Optical image capturing system
09904014 ยท 2018-02-27
Assignee
Inventors
Cpc classification
G02B13/18
PHYSICS
G02B5/208
PHYSICS
G02B6/2848
PHYSICS
International classification
G02B6/28
PHYSICS
G02B27/64
PHYSICS
Abstract
An optical image capturing system includes, along the optical axis in order from an object side to an image side, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens. At least one lens among the first to the sixth lenses has positive refractive force. The seventh lens can have negative refractive force, and both surfaces thereof are aspheric. At least a surface of the seventh lens has an inflection point. The lenses in the optical image capturing system which have refractive power include the first to the seventh lenses. The optical image capturing system can increase aperture value and improve the imaging quality for use in compact cameras.
Claims
1. An optical image capturing system, in order along an optical axis from an object side to an image side, comprising: a first lens having refractive power; a second lens having refractive power; a third lens having refractive power; a fourth lens having refractive power; a fifth lens having refractive power; a sixth lens having refractive power; a seventh lens having refractive power; a first image plane, which is an image plane specifically for visible light and perpendicular to the optical axis; a through-focus modulation transfer rate (value of MTF) at a first spatial frequency having a maximum value at central field of view of the first image plane; and a second image plane, which is an image plane specifically for infrared light and perpendicular to the optical axis; the through-focus modulation transfer rate (value of MTF) at the first spatial frequency having a maximum value at central of field of view of the second image plane; wherein the optical image capturing system consists of the seven lenses with refractive power; at least one lens among the first lens to the seventh lens is made of plastic, and at least one lens among the first lens to the seventh lens is made of glass; at least one lens among the first lens to the seventh lens has positive refractive power; each lens among the first lens to the seventh lens has an object-side surface, which faces the object side, and an image-side surface, which faces the image side; wherein the optical image capturing system satisfies:
1.0f/HEP10.0;
0 deg<HAF150 deg; and
|FS|60 m; where f1, f2, f3, f4, f5, f6, and f7 are focal lengths of the first lens to the seventh lens, respectively; f is a focal length of the optical image capturing system; HEP is an entrance pupil diameter of the optical image capturing system; HOS is a distance between an object-side surface of the first lens and the first image plane on the optical axis; HOI is a maximum image height on the first image plane perpendicular to the optical axis; InTL is a distance on the optical axis from the object-side surface of the first lens to the image-side surface of the seventh lens; HAF is a half of a maximum view angle of the optical image capturing system; for any surface of any lens; FS is a distance on the optical axis between the first image plane and the second image plane.
2. The optical image capturing system of claim 1, wherein a wavelength of the infrared light ranges from 700 nm to 1300 nm, and the first spatial frequency is denoted by SP1, which satisfies the following condition: SP1440 cycles/mm.
3. The optical image capturing system of claim 1, wherein the optical image capturing system further satisfies:
0.92(ARE/HEP)2.0; where ARE is a profile curve length measured from a start point where the optical axis of the belonging optical image capturing system passes through the surface of the lens, along a surface profile of the lens, and finally to a coordinate point of a perpendicular distance where is a half of the entrance pupil diameter away from the optical axis.
4. The optical image capturing system of claim 1, wherein at least two lenses among the first lens to the seventh lens is made of plastic.
5. The optical image capturing system of claim 1, wherein the third lens has positive refractive power, and the image-side surface thereof is convex on the optical axis.
6. The optical image capturing system of claim 1, wherein at least one surface of each of at least one lens among the first lens to the seventh lens has at least an inflection point.
7. The optical image capturing system of claim 1, wherein the optical image capturing system further satisfies:
0.05ARE71/TP735; and
0.05ARE72/TP735; where ARE71 is a profile curve length measured from a start point where the optical axis passes the object-side surface of the seventh lens, along a surface profile of the object-side surface of the seventh lens, and finally to a coordinate point of a perpendicular distance where is a half of the entrance pupil diameter away from the optical axis; ARE72 is a profile curve length measured from a start point where the optical axis passes the image-side surface of the seventh lens, along a surface profile of the image-side surface of the seventh lens, and finally to a coordinate point of a perpendicular distance where is a half of the entrance pupil diameter away from the optical axis; TP7 is a thickness of the seventh lens on the optical axis.
8. The optical image capturing system of claim 1, wherein the optical image capturing system further satisfies:
PLTA100 m;
PSTA100 m;
NLTA100 m;
NSTA100 m;
SLTA100 m;
SSTA100 m; and
|TDT|<100%; where TDT is a TV distortion; PLTA is a transverse aberration at 0.7 HOI on the image plane in the positive direction of a tangential fan of the optical image capturing system after a longest operation wavelength passing through an edge of the aperture; PSTA is a transverse aberration at 0.7 HOI on the image plane in the positive direction of the tangential fan after a shortest operation wavelength passing through the edge of the aperture; NLTA is a transverse aberration at 0.7 HOI on the image plane in the negative direction of the tangential fan after the longest operation wavelength passing through the edge of the aperture; NSTA is a transverse aberration at 0.7 HOI on the image plane in the negative direction of the tangential fan after the shortest operation wavelength passing through the edge of the aperture; SLTA is a transverse aberration at 0.7 HOI on the image plane of a sagittal fan of the optical image capturing system after the longest operation wavelength passing through the edge of the aperture; SSTA is a transverse aberration at 0.7 HOI on the image plane of a sagittal fan after the shortest operation wavelength passing through the edge of the aperture.
9. The optical image capturing system of claim 1, further comprising an aperture, wherein the optical image capturing system further satisfies:
0.2InS/HOS1.1; where InS is a distance between the aperture and the first image plane on the optical axis.
10. An optical image capturing system, in order along an optical axis from an object side to an image side, comprising: a first lens having refractive power; a second lens having refractive power; a third lens having refractive power; a fourth lens having refractive power; a fifth lens having refractive power; a sixth lens having refractive power; a seventh lens having refractive power; a first image plane, which is an image plane specifically for visible light and perpendicular to the optical axis; a through-focus modulation transfer rate (value of MTF) at a first spatial frequency having a maximum value at central field of view of the first image plane, and the first spatial frequency being 110 cycles/mm; and a second image plane, which is an image plane specifically for infrared light and perpendicular to the optical axis; the through-focus modulation transfer rate (value of MTF) at the first spatial frequency having a maximum value at central of field of view of the second image plane, and the first spatial frequency being 110 cycles/mm; wherein the optical image capturing system consists of the seven lenses with refractive power; at least one lens among the first lens to the seventh lens is made of plastic, and at least one lens among the first lens to the seventh lens is made of glass; at least one lens among the first lens to the seventh lens has positive refractive power; each lens among the first lens to the seventh lens has an object-side surface, which faces the object side, and an image-side surface, which faces the image side; wherein the optical image capturing system satisfies:
1.0f/HEP10.0;
0 deg<HAF150 deg;
|FS|60 m; and
0.92(ARE/HEP)2.0; where f1, f2, f3, f4, f5, f6, and f7 are focal lengths of the first lens to the seventh lens, respectively; f is a focal length of the optical image capturing system; HOI is a maximum height for image formation perpendicular to the optical axis on the image plane; HEP is an entrance pupil diameter of the optical image capturing system; HOS is a distance between the object-side surface of the first lens and the first image plane on the optical axis; InTL is a distance on the optical axis from the object-side surface of the first lens to the image-side surface of the seventh lens; HAF is a half of a maximum view angle of the optical image capturing system; for any surface of any lens; FS is a distance on the optical axis between the first image plane and the second image plane; ARE is a profile curve length measured from a start point where the optical axis passes therethrough, along a surface profile thereof, and finally to a coordinate point of a perpendicular distance where is a half of the entrance pupil diameter away from the optical axis.
11. The optical image capturing system of claim 10, wherein the optical image capturing system further satisfies:
0.9ARS/EHD2.0; where, for any surface of any lens, EHD is a maximum effective half diameter thereof, ARS is a profile curve length measured from a start point where the optical axis passes therethrough, along a surface profile thereof, and finally to an end point of the maximum effective half diameter thereof.
12. The optical image capturing system of claim 10, wherein each two neighboring lenses among the first to the seventh lenses are separated by air.
13. The optical image capturing system of claim 10, wherein the optical image capturing system further satisfies:
IN34IN45; and
IN34IN56; where IN34 is a distance on the optical axis between the third lens and the fourth lens; IN45 is a distance on the optical axis between the fourth lens and the fifth lens; and IN56 is a distance on the optical axis between the fifth lens and the sixth lens.
14. The optical image capturing system of claim 10, wherein at least two lenses among the first lens to the seventh lens is made of plastic.
15. The optical image capturing system of claim 10, wherein the first lens has negative refractive power, and the image-side surface thereof is concave on the optical axis.
16. The optical image capturing system of claim 10, wherein the third lens has positive refractive power, and the image-side surface thereof is convex on the optical axis.
17. The optical image capturing system of claim 10, wherein the image-side surface of the second lens is concave on the optical axis.
18. The optical image capturing system of claim 10, wherein at least one lens among the first lens to the seventh lens is a light filter, which is capable of filtering out light of wavelengths shorter than 500 nm.
19. The optical image capturing system of claim 10, wherein the optical image capturing system further satisfies:
0.1(TP7+IN67)/TP650; where IN67 is a distance on the optical axis between the sixth lens and the seventh lens; TP6 is a thickness of the sixth lens on the optical axis; TP7 is a thickness of the seventh lens on the optical axis.
20. An optical image capturing system, in order along an optical axis from an object side to an image side, comprising: a first lens having refractive power; a second lens having refractive power; a third lens having refractive power; a fourth lens having refractive power; a fifth lens having refractive power; a sixth lens having refractive power; a seventh lens having refractive power; a first average image plane, which is an image plane specifically for visible light and perpendicular to the optical axis; the first average image plane being installed at the average position of the defocusing positions, where through-focus modulation transfer rates (values of MTF) of the visible light at central field of view, 0.3 field of view, and 0.7 field of view are at their respective maximum at a first spatial frequency; the first spatial frequency being 110 cycles/mm; and a second average image plane, which is an image plane specifically for infrared light and perpendicular to the optical axis; the second average image plane being installed at the average position of the defocusing positions, where through-focus modulation transfer rates of the infrared light (values of MTF) at central field of view, 0.3 field of view, and 0.7 field of view are at their respective maximum at the first spatial frequency; the first spatial frequency being 110 cycles/mm; wherein the optical image capturing system consists of the seven lenses having refractive power; at least one lens among the first lens to the seventh lens is made of plastic, and at least one lens among the first lens to the seventh lens is made of glass; each lens among the first lens to the seventh lens has an object-side surface, which faces the object side, and an image-side surface, which faces the image side; wherein the optical image capturing system satisfies:
1f/HEP10;
0 deg<HAF150 deg;
|AFS|60 m; and
0.92(ARE/HEP)2.0; where f1, f2, f3, f4, f5, f6, and f7 are focal lengths of the first lens to the seventh lens, respectively; f is a focal length of the optical image capturing system; HEP is an entrance pupil diameter of the optical image capturing system; HAF is a half of a maximum view angle of the optical image capturing system; HOS is a distance between an object-side surface of the first lens and the image plane on the optical axis; HOI is a maximum image height on the first image plane perpendicular to the optical axis; InTL is a distance on the optical axis from the object-side surface of the first lens to the image-side surface of the seventh lens; AFS is a distance on the optical axis between the first average image plane and the second average image plane; ARE is a profile curve length measured from a start point where the optical axis passes therethrough, along a surface profile thereof, and finally to a coordinate point of a perpendicular distance where is a half of the entrance pupil diameter away from the optical axis.
21. The optical image capturing system of claim 20, wherein the optical image capturing system further satisfies:
0.9ARS/EHD2.0; where, for any surface of any lens, EHD is a maximum effective half diameter thereof, ARS is a profile curve length measured from a start point where the optical axis passes therethrough, along a surface profile thereof, and finally to an end point of the maximum effective half diameter thereof.
22. The optical image capturing system of claim 20, wherein each two neighboring lenses among the first to the seventh lenses are separated by air.
23. The optical image capturing system of claim 20, wherein the optical image capturing system further satisfies:
IN34IN45; and
IN34IN56; where IN34 is a distance on the optical axis between the third lens and the fourth lens; IN45 is a distance on the optical axis between the fourth lens and the fifth lens; and IN56 is a distance on the optical axis between the fifth lens and the sixth lens.
24. The optical image capturing system of claim 20, wherein the image-side surface of the third lens is convex on the optical axis.
25. The optical image capturing system of claim 20, further comprising an aperture and an image sensor, wherein the image sensing device is disposed on the first average image plane and comprises at least 100 thousand pixels; the optical image capturing system further satisfies:
0.2InS/HOS1.1; where InS is a distance between the aperture and the first average image plane on the optical axis.
Description
BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS
(1) The present invention will be best understood by referring to the following detailed description of some illustrative embodiments in conjunction with the accompanying drawings, in which
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DETAILED DESCRIPTION OF THE INVENTION
(32) An optical image capturing system of the present invention includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an image plane from an object side to an image side. The optical image capturing system further is provided with an image sensor at an image plane. The height for image formation in each of the following embodiments is about 3.91 mm.
(33) The optical image capturing system can work in three wavelengths, including 486.1 nm, 587.5 nm, and 656.2 nm, wherein 587.5 nm is the main reference wavelength and is the reference wavelength for obtaining the technical characters. The optical image capturing system can also work in five wavelengths, including 470 nm, 510 nm, 555 nm, 610 nm, and 650 nm wherein 555 nm is the main reference wavelength, and is the reference wavelength for obtaining the technical characters.
(34) The optical image capturing system of the present invention satisfies 0.5PPR/|NPR|15, and a preferable range is 1PPR/|NPR|3.0, where PPR is a ratio of the focal length fp of the optical image capturing system to a focal length fp of each of lenses with positive refractive power; NPR is a ratio of the focal length fn of the optical image capturing system to a focal length fn of each of lenses with negative refractive power; PPR is a sum of the PPRs of each positive lens; and NPR is a sum of the NPRs of each negative lens. It is helpful for control of an entire refractive power and an entire length of the optical image capturing system.
(35) The image sensor is provided on the image plane. The optical image capturing system of the present invention satisfies HOS/HOI10 and 0.5HOS/f10, and a preferable range is 1HOS/HOI5 and 1HOS/f7, where HOI is a half of a diagonal of an effective sensing area of the image sensor, i.e., the maximum image height, and HOS is a height of the optical image capturing system, i.e. a distance on the optical axis between the object-side surface of the first lens and the image plane. It is helpful for reduction of the size of the system for used in compact cameras.
(36) The optical image capturing system of the present invention further is provided with an aperture to increase image quality.
(37) In the optical image capturing system of the present invention, the aperture could be a front aperture or a middle aperture, wherein the front aperture is provided between the object and the first lens, and the middle is provided between the first lens and the image plane. The front aperture provides a long distance between an exit pupil of the system and the image plane, which allows more elements to be installed. The middle could enlarge a view angle of view of the system and increase the efficiency of the image sensor. The optical image capturing system satisfies 0.2InS/HOS1.1, where InS is a distance between the aperture and the image-side surface of the sixth lens. It is helpful for size reduction and wide angle.
(38) The optical image capturing system of the present invention satisfies 0.1TP/InTL0.9, where InTL is a distance between the object-side surface of the first lens and the image-side surface of the seventh lens, and ETP is a sum of central thicknesses of the lenses on the optical axis. It is helpful for the contrast of image and yield rate of manufacture and provides a suitable back focal length for installation of other elements.
(39) The optical image capturing system of the present invention satisfies 0.001|R1/R2|20, and a preferable range is 0.01|R1/R2|<10, where R1 is a radius of curvature of the object-side surface of the first lens, and R2 is a radius of curvature of the image-side surface of the first lens. It provides the first lens with a suitable positive refractive power to reduce the increase rate of the spherical aberration.
(40) The optical image capturing system of the present invention satisfies 7<(R11R12)/(R11+R12)<50, where R13 is a radius of curvature of the object-side surface of the seventh lens, and R14 is a radius of curvature of the image-side surface of the seventh lens. It may modify the astigmatic field curvature.
(41) The optical image capturing system of the present invention satisfies IN12/f3.0, where IN12 is a distance on the optical axis between the first lens and the second lens. It may correct chromatic aberration and improve the performance.
(42) The optical image capturing system of the present invention satisfies IN67/f0.8, where IN67 is a distance on the optical axis between the sixth lens and the seventh lens. It may correct chromatic aberration and improve the performance.
(43) The optical image capturing system of the present invention satisfies 0.1(TP1+IN12)/TP210, where TP1 is a central thickness of the first lens on the optical axis, and TP2 is a central thickness of the second lens on the optical axis. It may control the sensitivity of manufacture of the system and improve the performance.
(44) The optical image capturing system of the present invention satisfies 0.1(TP7+IN67)/TP610, where TP6 is a central thickness of the sixth lens on the optical axis, TP7 is a central thickness of the seventh lens on the optical axis, and IN67 is a distance between the sixth lens and the seventh lens. It may control the sensitivity of manufacture of the system and improve the performance.
(45) The optical image capturing system of the present invention satisfies 0.1TP4/(IN34+TP4+IN45)1, where TP3 is a central thickness of the third lens on the optical axis, TP4 is a central thickness of the fourth lens on the optical axis, TP5 is a central thickness of the fifth lens on the optical axis, IN34 is a distance on the optical axis between the third lens and the fourth lens, IN45 is a distance on the optical axis between the fourth lens and the fifth lens, and InTL is a distance between the object-side surface of the first lens and the image-side surface of the seventh lens. It may fine tune and correct the aberration of the incident rays layer by layer, and reduce the height of the system.
(46) The optical image capturing system satisfies 0 mmHVT713 mm; 0 mm<HVT726 mm; 0HVT71/HVT72; 0 mm|SGC71|0.5 mm; 0 mm|SGC72|2 mm; and 0<|SGC72|/(|SGC72|+TP7)0.9, where HVT71 a distance perpendicular to the optical axis between the critical point C71 on the object-side surface of the seventh lens and the optical axis; HVT72 a distance perpendicular to the optical axis between the critical point C72 on the image-side surface of the seventh lens and the optical axis; SGC71 is a distance on the optical axis between a point on the object-side surface of the seventh lens where the optical axis passes through and a point where the critical point C71 projects on the optical axis; SGC72 is a distance on the optical axis between a point on the image-side surface of the seventh lens where the optical axis passes through and a point where the critical point C72 projects on the optical axis. It is helpful to correct the off-axis view field aberration.
(47) The optical image capturing system satisfies 0.2HVT72/HOI0.9, and preferably satisfies 0.3HVT72/HOI0.8. It may help to correct the peripheral aberration.
(48) The optical image capturing system satisfies 0HVT72/HOS0.5, and preferably satisfies 0.2HVT72/HOS0.45. It may help to correct the peripheral aberration.
(49) The optical image capturing system of the present invention satisfies 0<SGI711/(SGI711+TP7)0.9; 0<SGI721/(SGI721+TP7)0.9, and it is preferable to satisfy 0.1SGI711/(SGI711+TP7)0.6; 0.1SGI721/(SGI721+TP7)0.6, where SGI711 is a displacement on the optical axis from a point on the object-side surface of the seventh lens, through which the optical axis passes, to a point where the inflection point on the object-side surface, which is the closest to the optical axis, projects on the optical axis, and SGI721 is a displacement on the optical axis from a point on the image-side surface of the seventh lens, through which the optical axis passes, to a point where the inflection point on the image-side surface, which is the closest to the optical axis, projects on the optical axis.
(50) The optical image capturing system of the present invention satisfies 0<SGI712/(SGI712+TP7)0.9; 0<SGI722/(SGI722+TP7)0.9, and it is preferable to satisfy 0.1SGI712/(SGI712+TP7)0.6; 0.1SGI722/(SGI722+TP7)0.6, where SGI712 is a displacement on the optical axis from a point on the object-side surface of the seventh lens, through which the optical axis passes, to a point where the inflection point on the object-side surface, which is the second closest to the optical axis, projects on the optical axis, and SGI722 is a displacement on the optical axis from a point on the image-side surface of the seventh lens, through which the optical axis passes, to a point where the inflection point on the image-side surface, which is the second closest to the optical axis, projects on the optical axis.
(51) The optical image capturing system of the present invention satisfies 0.001 mm|HIF711|5 mm; 0.001 mm|HIF721|5 mm, and it is preferable to satisfy 0.1 mm|HIF711|3.5 mm; 1.5 mm|HIF721|3.5 mm, where HIF711 is a distance perpendicular to the optical axis between the inflection point on the object-side surface of the seventh lens, which is the closest to the optical axis, and the optical axis; HIF721 is a distance perpendicular to the optical axis between the inflection point on the image-side surface of the seventh lens, which is the closest to the optical axis, and the optical axis.
(52) The optical image capturing system of the present invention satisfies 0.001 mm|HIF712|5 mm; 0.001 mm|HIF722|5 mm, and it is preferable to satisfy 0.1 mm|HIF722|3.5 mm; 0.1 mm|HIF712|3.5 mm, where HIF712 is a distance perpendicular to the optical axis between the inflection point on the object-side surface of the seventh lens, which is the second closest to the optical axis, and the optical axis; HIF722 is a distance perpendicular to the optical axis between the inflection point on the image-side surface of the seventh lens, which is the second closest to the optical axis, and the optical axis.
(53) The optical image capturing system of the present invention satisfies 0.001 mm|HIF713|5 mm; 0.001 mm|HIF723|5 mm, and it is preferable to satisfy 0.1 mm|HIF723|3.5 mm; 0.1 mm|HIF713|3.5 mm, where HIF713 is a distance perpendicular to the optical axis between the inflection point on the object-side surface of the seventh lens, which is the third closest to the optical axis, and the optical axis; HIF723 is a distance perpendicular to the optical axis between the inflection point on the image-side surface of the seventh lens, which is the third closest to the optical axis, and the optical axis.
(54) The optical image capturing system of the present invention satisfies 0.001 mm|HIF714|5 mm; 0.001 mm|HIF724|5 mm, and it is preferable to satisfy 0.1 mm|HIF724|3.5 mm; 0.1 mm|HIF714|3.5 mm, where HIF714 is a distance perpendicular to the optical axis between the inflection point on the object-side surface of the seventh lens, which is the fourth closest to the optical axis, and the optical axis; HIF724 is a distance perpendicular to the optical axis between the inflection point on the image-side surface of the seventh lens, which is the fourth closest to the optical axis, and the optical axis.
(55) In an embodiment, the lenses of high Abbe number and the lenses of low Abbe number are arranged in an interlaced arrangement that could be helpful for correction of aberration of the system.
(56) An equation of aspheric surface is
z=ch.sup.2/[1+[1(k+1)c.sup.2h.sup.2].sup.0.5]+A4h.sup.4+A6h.sup.6+A8h.sup.8+A10h.sup.10+A12h.sup.12+A14h.sup.14+A16 h.sup.16+A18h.sup.18+A20h.sup.20+ . . .(1)
(57) where z is a depression of the aspheric surface; k is conic constant; c is reciprocal of the radius of curvature; and A4, A6, A8, A10, A12, A14, A16, A18, and A20 are high-order aspheric coefficients.
(58) In the optical image capturing system, the lenses could be made of plastic or glass. The plastic lenses may reduce the weight and lower the cost of the system, and the glass lenses may control the thermal effect and enlarge the space for arrangement of the refractive power of the system. In addition, the opposite surfaces (object-side surface and image-side surface) of the first to the seventh lenses could be aspheric that can obtain more control parameters to reduce aberration. The number of aspheric glass lenses could be less than the conventional spherical glass lenses, which is helpful for reduction of the height of the system.
(59) When the lens has a convex surface, which means that the surface is convex around a position, through which the optical axis passes, and when the lens has a concave surface, which means that the surface is concave around a position, through which the optical axis passes.
(60) The optical image capturing system of the present invention could be applied in a dynamic focusing optical system. It is superior in the correction of aberration and high imaging quality so that it could be allied in lots of fields.
(61) The optical image capturing system of the present invention could further include a driving module to meet different demands, wherein the driving module can be coupled with the lenses to move the lenses. The driving module can be a voice coil motor (VCM), which is used to move the lens for focusing, or can be an optical image stabilization (OIS) component, which is used to lower the possibility of having the problem of image blurring which is caused by subtle movements of the lens while shooting.
(62) To meet different requirements, at least one lens among the first lens to the seventh lens of the optical image capturing system of the present invention can be a light filter, which filters out light of wavelength shorter than 500 nm. Such effect can be achieved by coating on at least one surface of the lens, or by using materials capable of filtering out short waves to make the lens.
(63) To meet different requirements, the image plane of the optical image capturing system in the present invention can be either flat or curved. If the image plane is curved (e.g., a sphere with a radius of curvature), the incidence angle required for focusing light on the image plane can be decreased, which is not only helpful to shorten the length of the system (TTL), but also helpful to increase the relative illuminance.
(64) We provide several embodiments in conjunction with the accompanying drawings for the best understanding, which are:
First Embodiment
(65) As shown in
(66) The first lens 110 has negative refractive power and is made of plastic. An object-side surface 112 thereof, which faces the object side, is a concave aspheric surface, and an image-side surface 114 thereof, which faces the image side, is a concave aspheric surface. The object-side surface 112 has an inflection point thereon, and the image-side surface 114 has two inflection points. A profile curve length of the maximum effective half diameter of an object-side surface of the first lens 110 is denoted by ARS11, and a profile curve length of the maximum effective half diameter of the image-side surface of the first lens 110 is denoted by ARS12. A profile curve length of a half of an entrance pupil diameter (HEP) of the object-side surface of the first lens 110 is denoted by ARE11, and a profile curve length of a half of the entrance pupil diameter (HEP) of the image-side surface of the first lens 110 is denoted by ARE12. A thickness of the first lens 110 on the optical axis is TP1.
(67) The first lens satisfies SGI111=0.1110 mm; SGI121=2.7120 mm; TP1=2.2761 mm; |SGI111|/(|SGI111|+TP1)=0.0465; |SGI1211/(|SGI121|+TP1)=0.5437, where SGI111 is a displacement on the optical axis from a point on the object-side surface of the first lens, through which the optical axis passes, to a point where the inflection point on the object-side surface, which is the closest to the optical axis, projects on the optical axis, and SGI121 is a displacement on the optical axis from a point on the image-side surface of the first lens, through which the optical axis passes, to a point where the inflection point on the image-side surface, which is the closest to the optical axis, projects on the optical axis.
(68) The first lens satisfies SGI112=0 mm; SGI122=4.2315 mm; |SGI112|/(|SGI112|+TP1)=0; |SGI122|/(|SGI122|+TP1)=0.6502, where SGI112 is a displacement on the optical axis from a point on the object-side surface of the first lens, through which the optical axis passes, to a point where the inflection point on the object-side surface, which is the second closest to the optical axis, projects on the optical axis, and SGI121 is a displacement on the optical axis from a point on the image-side surface of the first lens, through which the optical axis passes, to a point where the inflection point on the image-side surface, which is the second closest to the optical axis, projects on the optical axis.
(69) The first lens satisfies HIF111=12.8432 mm; HIF111/HOI=1.7127; HIF121=7.1744 mm; HIF121/HOI=0.9567, where HIF111 is a displacement perpendicular to the optical axis from a point on the object-side surface of the first lens, through which the optical axis passes, to the inflection point, which is the closest to the optical axis; HIF121 is a displacement perpendicular to the optical axis from a point on the image-side surface of the first lens, through which the optical axis passes, to the inflection point, which is the closest to the optical axis.
(70) The first lens satisfies HIF112=0 mm; HIF112/HOI=0; HIF122=9.8592 mm; HIF122/HOI=1.3147, where HIF112 is a displacement perpendicular to the optical axis from a point on the object-side surface of the first lens, through which the optical axis passes, to the inflection point, which is the second closest to the optical axis; HIF122 is a displacement perpendicular to the optical axis from a point on the image-side surface of the first lens, through which the optical axis passes, to the inflection point, which is the second closest to the optical axis.
(71) The second lens 120 has positive refractive power and is made of plastic. An object-side surface 122 thereof, which faces the object side, is a convex aspheric surface, and an image-side surface 124 thereof, which faces the image side, is a concave aspheric surface. A profile curve length of the maximum effective half diameter of an object-side surface of the second lens 120 is denoted by ARS21, and a profile curve length of the maximum effective half diameter of the image-side surface of the second lens 120 is denoted by ARS22. A profile curve length of a half of an entrance pupil diameter (REP) of the object-side surface of the second lens 120 is denoted by ARE21, and a profile curve length of a half of the entrance pupil diameter (HEP) of the image-side surface of the second lens 120 is denoted by ARE22. A thickness of the second lens 120 on the optical axis is TP2.
(72) For the second lens, a displacement on the optical axis from a point on the object-side surface of the second lens, through which the optical axis passes, to a point where the inflection point on the image-side surface, which is the closest to the optical axis, projects on the optical axis, is denoted by SGI211, and a displacement on the optical axis from a point on the image-side surface of the second lens, through which the optical axis passes, to a point where the inflection point on the image-side surface, which is the closest to the optical axis, projects on the optical axis is denoted by SGI221.
(73) For the second lens, a displacement perpendicular to the optical axis from a point on the object-side surface of the second lens, through which the optical axis passes, to the inflection point, which is the closest to the optical axis is denoted by HIF211, and a displacement perpendicular to the optical axis from a point on the image-side surface of the second lens, through which the optical axis passes, to the inflection point, which is the closest to the optical axis is denoted by HIF221.
(74) The third lens 130 has negative refractive power and is made of plastic. An object-side surface 132, which faces the object side, is a convex aspheric surface, and an image-side surface 134, which faces the image side, is a concave aspheric surface. A profile curve length of the maximum effective half diameter of an object-side surface of the third lens 130 is denoted by ARS31, and a profile curve length of the maximum effective half diameter of the image-side surface of the third lens 130 is denoted by ARS32. A profile curve length of a half of an entrance pupil diameter (HEP) of the object-side surface of the third lens 130 is denoted by ARE31, and a profile curve length of a half of the entrance pupil diameter (HEP) of the image-side surface of the third lens 130 is denoted by ARS32. A thickness of the third lens 130 on the optical axis is TP3.
(75) For the third lens 130, SGI311 is a displacement on the optical axis from a point on the object-side surface of the third lens, through which the optical axis passes, to a point where the inflection point on the object-side surface, which is the closest to the optical axis, projects on the optical axis, and SGI321 is a displacement on the optical axis from a point on the image-side surface of the third lens, through which the optical axis passes, to a point where the inflection point on the image-side surface, which is the closest to the optical axis, projects on the optical axis.
(76) For the third lens 130, SGI312 is a displacement on the optical axis from a point on the object-side surface of the third lens, through which the optical axis passes, to a point where the inflection point on the object-side surface, which is the second closest to the optical axis, projects on the optical axis, and SGI322 is a displacement on the optical axis from a point on the image-side surface of the third lens, through which the optical axis passes, to a point where the inflection point on the object-side surface, which is the second closest to the optical axis, projects on the optical axis.
(77) For the third lens 130, HIF311 is a distance perpendicular to the optical axis between the inflection point on the object-side surface of the third lens, which is the closest to the optical axis, and the optical axis; HIF321 is a distance perpendicular to the optical axis between the inflection point on the image-side surface of the third lens, which is the closest to the optical axis, and the optical axis.
(78) For the third lens 130, HIF312 is a distance perpendicular to the optical axis between the inflection point on the object-side surface of the third lens, which is the second closest to the optical axis, and the optical axis; HIF322 is a distance perpendicular to the optical axis between the inflection point on the image-side surface of the third lens, which is the second closest to the optical axis, and the optical axis.
(79) The fourth lens 140 has positive refractive power and is made of plastic. An object-side surface 142, which faces the object side, is a convex aspheric surface, and an image-side surface 144, which faces the image side, is a convex aspheric surface. The object-side surface 142 has an inflection point. A profile curve length of the maximum effective half diameter of an object-side surface of the fourth lens 140 is denoted by ARS41, and a profile curve length of the maximum effective half diameter of the image-side surface of the fourth lens 140 is denoted by ARS42. A profile curve length of a half of an entrance pupil diameter (HEP) of the object-side surface of the fourth lens 140 is denoted by ARE41, and a profile curve length of a half of the entrance pupil diameter (HEP) of the image-side surface of the fourth lens 140 is denoted by ARS42. A thickness of the fourth lens 140 on the optical axis is TP4.
(80) The fourth lens 140 satisfies SGI411=0.0018 mm; |SGI411|/(|SGI411|+TP4)=0.0009, where SGI411 is a displacement on the optical axis from a point on the object-side surface of the fourth lens, through which the optical axis passes, to a point where the inflection point on the object-side surface, which is the closest to the optical axis, projects on the optical axis, and SGI421 is a displacement on the optical axis from a point on the image-side surface of the fourth lens, through which the optical axis passes, to a point where the inflection point on the image-side surface, which is the closest to the optical axis, projects on the optical axis.
(81) For the fourth lens 140, SGI412 is a displacement on the optical axis from a point on the object-side surface of the fourth lens, through which the optical axis passes, to a point where the inflection point on the object-side surface, which is the second closest to the optical axis, projects on the optical axis, and SGI422 is a displacement on the optical axis from a point on the image-side surface of the fourth lens, through which the optical axis passes, to a point where the inflection point on the object-side surface, which is the second closest to the optical axis, projects on the optical axis.
(82) The fourth lens 140 further satisfies HIF411=0.7191 mm; HIF411/HOI=0.0959, where HIF411 is a distance perpendicular to the optical axis between the inflection point on the object-side surface of the fourth lens, which is the closest to the optical axis, and the optical axis; HIF421 is a distance perpendicular to the optical axis between the inflection point on the image-side surface of the fourth lens, which is the closest to the optical axis, and the optical axis.
(83) For the fourth lens 140, HIF412 is a distance perpendicular to the optical axis between the inflection point on the object-side surface of the fourth lens, which is the second closest to the optical axis, and the optical axis; HIF422 is a distance perpendicular to the optical axis between the inflection point on the image-side surface of the fourth lens, which is the second closest to the optical axis, and the optical axis.
(84) The fifth lens 150 has positive refractive power and is made of plastic. An object-side surface 152, which faces the object side, is a concave aspheric surface, and an image-side surface 154, which faces the image side, is a convex aspheric surface. The object-side surface 152 and the image-side surface 154 both have an inflection point. A profile curve length of the maximum effective half diameter of an object-side surface of the fifth lens 150 is denoted by ARS51, and a profile curve length of the maximum effective half diameter of the image-side surface of the fifth lens 150 is denoted by ARS52. A profile curve length of a half of an entrance pupil diameter (HEP) of the object-side surface of the fifth lens 150 is denoted by ARE51, and a profile curve length of a half of the entrance pupil diameter (HEP) of the image-side surface of the fifth lens 150 is denoted by ARE52. A thickness of the fifth lens 150 on the optical axis is TP5.
(85) The fifth lens 150 satisfies SGI511=0.1246 mm; SGI521=2.1477 mm; |SGI511|/(|SGI511|+TP5)=0.0284; |SGI521|/(|SGI521|+TP5)=0.3346, where SGI511 is a displacement on the optical axis from a point on the object-side surface of the fifth lens, through which the optical axis passes, to a point where the inflection point on the object-side surface, which is the closest to the optical axis, projects on the optical axis, and SGI521 is a displacement on the optical axis from a point on the image-side surface of the fifth lens, through which the optical axis passes, to a point where the inflection point on the image-side surface, which is the closest to the optical axis, projects on the optical axis.
(86) For the fifth lens 150, SGI512 is a displacement on the optical axis from a point on the object-side surface of the fifth lens, through which the optical axis passes, to a point where the inflection point on the object-side surface, which is the second closest to the optical axis, projects on the optical axis, and SGI522 is a displacement on the optical axis from a point on the image-side surface of the fifth lens, through which the optical axis passes, to a point where the inflection point on the object-side surface, which is the second closest to the optical axis, projects on the optical axis.
(87) The fifth lens 150 further satisfies HIF511=3.8179 mm; HIF521=4.5480 mm; HIF511/HOI=0.5091; HIF521/HOI=0.6065, where HIF511 is a distance perpendicular to the optical axis between the inflection point on the object-side surface of the fifth lens, which is the closest to the optical axis, and the optical axis; HIF521 is a distance perpendicular to the optical axis between the inflection point on the image-side surface of the fifth lens, which is the closest to the optical axis, and the optical axis.
(88) For the fifth lens 150, HIF512 is a distance perpendicular to the optical axis between the inflection point on the object-side surface of the fifth lens, which is the second closest to the optical axis, and the optical axis; HIF522 is a distance perpendicular to the optical axis between the inflection point on the image-side surface of the fifth lens, which is the second closest to the optical axis, and the optical axis.
(89) The sixth lens 160 has negative refractive power and is made of plastic. An object-side surface 162, which faces the object side, is a convex surface, and an image-side surface 164, which faces the image side, is a concave surface. The object-side surface 162 and the image-side surface 164 both have an inflection point, which could adjust the incident angle of each view field to improve aberration. A profile curve length of the maximum effective half diameter of an object-side surface of the sixth lens 160 is denoted by ARS61, and a profile curve length of the maximum effective half diameter of the image-side surface of the sixth lens 160 is denoted by ARS62. A profile curve length of a half of an entrance pupil diameter (HEP) of the object-side surface of the sixth lens 160 is denoted by ARE61, and a profile curve length of a half of the entrance pupil diameter (HEP) of the image-side surface of the sixth lens 160 is denoted by ARE62. A thickness of the sixth lens 160 on the optical axis is TP6.
(90) The sixth lens 160 satisfies SGI611=0.3208 mm; SGI621=0.5937 mm; |SGI611|/(|SGI611|+TP6)=0.5167; |SGI6211/(|SGI621|+TP6)=0.6643, where SGI611 is a displacement on the optical axis from a point on the object-side surface of the sixth lens, through which the optical axis passes, to a point where the inflection point on the object-side surface, which is the closest to the optical axis, projects on the optical axis, and SGI621 is a displacement on the optical axis from a point on the image-side surface of the sixth lens, through which the optical axis passes, to a point where the inflection point on the image-side surface, which is the closest to the optical axis, projects on the optical axis.
(91) The sixth lens 160 further satisfies HIF611=1.9655 mm; HIF621=2.0041 mm; HIF611/HOI=0.2621; HIF621/HOI=0.2672, where HIF611 is a distance perpendicular to the optical axis between the inflection point on the object-side surface of the sixth lens, which is the closest to the optical axis, and the optical axis; HIF621 is a distance perpendicular to the optical axis between the inflection point on the image-side surface of the sixth lens, which is the closest to the optical axis, and the optical axis.
(92) The seventh lens 170 has positive refractive power and is made of plastic. An object-side surface 172, which faces the object side, is a convex surface, and an image-side surface 174, which faces the image side, is a concave surface. This would help to shorten the back focal length, whereby to keep the optical image capturing system miniaturized. The object-side surface 172 and the image-side surface 174 both have an inflection point. A profile curve length of the maximum effective half diameter of an object-side surface of the seventh lens 170 is denoted by ARS71, and a profile curve length of the maximum effective half diameter of the image-side surface of the seventh lens 170 is denoted by ARS72. A profile curve length of a half of an entrance pupil diameter (HEP) of the object-side surface of the seventh lens 170 is denoted by ARE71, and a profile curve length of a half of the entrance pupil diameter (HEP) of the image-side surface of the seventh lens 170 is denoted by ARE72. A thickness of the seventh lens 170 on the optical axis is TP7.
(93) The seventh lens 170 satisfies SGI711=0.5212 mm; SG172|=0.5668 mm; |SGI711|/(|SGI7111+TP7)=0.3179; |SGI7211/(|SGI7211+TP7)=0.3364, where SGI711 is a displacement on the optical axis from a point on the object-side surface of the seventh lens, through which the optical axis passes, to a point where the inflection point on the object-side surface, which is the closest to the optical axis, projects on the optical axis, and SGI721 is a displacement on the optical axis from a point on the image-side surface of the seventh lens, through which the optical axis passes, to a point where the inflection point on the image-side surface, which is the closest to the optical axis, projects on the optical axis.
(94) The seventh lens 170 further satisfies HIF711=1.6707 mm; HIF721=1.8616 mm; HIF711/HOI=0.2228; HIF721/HOI=0.2482, where HIF711 is a distance perpendicular to the optical axis between the inflection point on the object-side surface of the seventh lens, which is the closest to the optical axis, and the optical axis; HIF721 is a distance perpendicular to the optical axis between the inflection point on the image-side surface of the seventh lens, which is the closest to the optical axis, and the optical axis.
(95) The infrared rays filter 180 is made of glass and between the seventh lens 170 and the image plane 190. The infrared rays filter 180 gives no contribution to the focal length of the system.
(96) The optical image capturing system 10 of the first embodiment has the following parameters, which are f=4.3019 mm; f/HEP=1.2; HAF=59.9968 deg; and tan(HAF)=1.7318, where f is a focal length of the system; HAF is a half of the maximum field angle; and REP is an entrance pupil diameter.
(97) The parameters of the lenses of the first embodiment are f1=14.5286 mm; |f/f1|=0.2961; f7=8.2933; |f1|>f7; and |f1/f7|=1.7519, where f1 is a focal length of the first lens 110; and f7 is a focal length of the seventh lens 170.
(98) The first embodiment further satisfies |f2|+|f3|+|f4|+|f5|+|f6|=144.7494; |f1|+|f7|=22.8219 and |f2|+|f3|+|f4|+|f5|+|f6|>|f1|+|f7|, where f2 is a focal length of the second lens 120, f3 is a focal length of the third lens 130, f4 is a focal length of the fourth lens 140, f5 is a focal length of the fifth lens 150, and f6 is a focal length of the sixth lens 160.
(99) The optical image capturing system 10 of the first embodiment further satisfies PPR=f/f2+f/f4+f/f5+f/f7=1.7384; NPR=f/f1+f/f3+f/f6=0.9999; PPR/|NPR|=1.7386; |f/f2|=0.1774; |f/f31=0.0443; |f/f4|=0.4411; |f/f5|=0.6012; |f/f6|=0.6595; |f/f7|=0.5187, where PPR is a ratio of a focal length fp of the optical image capturing system to a focal length fp of each of the lenses with positive refractive power; and NPR is a ratio of a focal length fn of the optical image capturing system to a focal length fn of each of lenses with negative refractive power.
(100) The optical image capturing system 10 of the first embodiment further satisfies InTL+BFL=HOS; HOS=26.9789 mm; HOI=7.5 mm; HOS/HOI=3.5977; HOS/f=6.2715; InS=12.4615 mm; and InS/HOS=0.4619, where InTL is a distance between the object-side surface 112 of the first lens 110 and the image-side surface 174 of the seventh lens 170; HOS is a height of the image capturing system, i.e. a distance between the object-side surface 112 of the first lens 110 and the image plane 190; InS is a distance between the aperture 100 and the image plane 190; HOI is a half of a diagonal of an effective sensing area of the image sensor 192, i.e., the maximum image height; and BFL is a distance between the image-side surface 174 of the seventh lens 170 and the image plane 190.
(101) The optical image capturing system 10 of the first embodiment further satisfies TP=16.0446 mm; and TP/InTL=0.6559, where TP is a sum of the thicknesses of the lenses 110-150 with refractive power. It is helpful for the contrast of image and yield rate of manufacture and provides a suitable back focal length for installation of other elements.
(102) The optical image capturing system 10 of the first embodiment further satisfies |R1/R2|=129.9952, where R1 is a radius of curvature of the object-side surface 112 of the first lens 110, and R2 is a radius of curvature of the image-side surface 114 of the first lens 110. It provides the first lens with a suitable positive refractive power to reduce the increase rate of the spherical aberration.
(103) The optical image capturing system 10 of the first embodiment further satisfies (R13R14)/(R13+R14)=0.0806, where R13 is a radius of curvature of the object-side surface 172 of the seventh lens 170, and R14 is a radius of curvature of the image-side surface 174 of the seventh lens 170. It may modify the astigmatic field curvature.
(104) The optical image capturing system 10 of the first embodiment further satisfies PP=f2+f4+f5+f7=49.4535 mm; and f4/(f2+f4+f5+f7)=0.1972, where PP is a sum of the focal length fp of each lens with positive refractive power. It is helpful to share the positive refractive power of the fourth lens 140 to other positive lenses to avoid the significant aberration caused by the incident rays.
(105) The optical image capturing system 10 of the first embodiment further satisfies NP=f1+f3+f6=118.1178 mm; and f1/(f1+f3+f6)=0.1677, where NP is a sum of the focal length fn of each lens with negative refractive power. It is helpful to share the negative refractive power of the first lens 110 to other negative lenses, which avoids the significant aberration caused by the incident rays.
(106) The optical image capturing system 10 of the first embodiment further satisfies IN12=4.5524 mm; IN12/f=1.0582, where IN12 is a distance on the optical axis between the first lens 110 and the second lens 120. It may correct chromatic aberration and improve the performance.
(107) The optical image capturing system 10 of the first embodiment further satisfies TP1=2.2761 mm; TP2=0.2398 mm; and (TP1+IN12)/TP2=1.3032, where TP1 is a central thickness of the first lens 110 on the optical axis, and TP2 is a central thickness of the second lens 120 on the optical axis. It may control the sensitivity of manufacture of the system and improve the performance.
(108) The optical image capturing system 10 of the first embodiment further satisfies TP6=0.3000 mm; TP7=1.1182 mm; and (TP7+IN67)/TP6=4.4322, where TP6 is a central thickness of the sixth lens 160 on the optical axis, TP7 is a central thickness of the seventh lens 170 on the optical axis, and IN67 is a distance on the optical axis between the sixth lens 160 and the seventh lens 170. It may control the sensitivity of manufacture of the system and lower the total height of the system.
(109) The optical image capturing system 10 of the first embodiment further satisfies TP3=0.8369 mm; TP4=2.0022 mm; TP5=4.2706 mm; IN34=1.9268 mm; IN45=1.5153 mm; and TP4/(IN34+TP4+IN45)=0.3678, where TP3 is a central thickness of the third lens 130 on the optical axis, TP4 is a central thickness of the fourth lens 140 on the optical axis, TP5 is a central thickness of the fifth lens 150 on the optical axis, IN34 is a distance on the optical axis between the third lens 130 and the fourth lens 140, IN45 is a distance on the optical axis between the fourth lens 140 and the fifth lens 150, and InTL is a distance from the object-side surface 112 of the first lens 110 to the image-side surface 174 of the seventh lens 170 on the optical axis. It may control the sensitivity of manufacture of the system and lower the total height of the system.
(110) The optical image capturing system 10 of the first embodiment further satisfies InRS61=0.7823 mm; InRS62=0.2166 mm; and nRS62|/TP6=0.722, where InRS61 is a displacement from a point on the object-side surface 162 of the sixth lens 160 passed through by the optical axis to a point on the optical axis where a projection of the maximum effective semi diameter of the object-side surface 162 of the sixth lens 160 ends; InRS62 is a displacement from a point on the image-side surface 166 of the sixth lens 160 passed through by the optical axis to a point on the optical axis where a projection of the maximum effective semi diameter of the image-side surface 166 of the sixth lens 160 ends; and TP6 is a central thickness of the sixth lens 160 on the optical axis. It is helpful for manufacturing and shaping of the lenses and is helpful to reduce the size.
(111) The optical image capturing system 10 of the first embodiment further satisfies HVT61=3.3498 mm; HVT62=3.9860 mm; and HVT61/HVT62=0.8404, where HVT61 is a distance perpendicular to the optical axis between the critical point on the object-side surface 162 of the sixth lens and the optical axis; and HVT62 is a distance perpendicular to the optical axis between the critical point on the image-side surface 166 of the sixth lens and the optical axis.
(112) The optical image capturing system 10 of the first embodiment further satisfies InRS71=0.2756 mm; InRS72=0.0938 mm; and |InRS72|/TP7=0.0839, where InRS71 is a displacement from a point on the object-side surface 172 of the seventh lens 170 passed through by the optical axis to a point on the optical axis where a projection of the maximum effective semi diameter of the object-side surface 172 of the seventh lens 170 ends; InRS72 is a displacement from a point on the image-side surface 174 of the seventh lens 170 passed through by the optical axis to a point on the optical axis where a projection of the maximum effective semi diameter of the image-side surface 174 of the seventh lens 170 ends; and TP7 is a central thickness of the seventh lens 170 on the optical axis. It is helpful for manufacturing and shaping of the lenses and is helpful to reduce the size.
(113) The optical image capturing system 10 of the first embodiment satisfies HVT71=3.6822 mm; HVT72=4.0606 mm; and HVT71/HVT72=0.9068, where HVT71 a distance perpendicular to the optical axis between the critical point on the object-side surface 172 of the seventh lens and the optical axis; and HVT72 a distance perpendicular to the optical axis between the critical point on the image-side surface 174 of the seventh lens and the optical axis.
(114) The optical image capturing system 10 of the first embodiment satisfies HVT72/HOI=0.5414. It is helpful for correction of the aberration of the peripheral view field of the optical image capturing system.
(115) The optical image capturing system 10 of the first embodiment satisfies HVT72/HOS=0.1505. It is helpful for correction of the aberration of the peripheral view field of the optical image capturing system.
(116) The second lens 120, the third lens 130, and the seventh lens 170 have negative refractive power. The optical image capturing system 10 of the first embodiment further satisfies 1NA7/NA2, where NA2 is an Abbe number of the second lens 120; NA3 is an Abbe number of the third lens 130; and NA7 is an Abbe number of the seventh lens 170. It may correct the aberration of the optical image capturing system.
(117) The optical image capturing system 10 of the first embodiment further satisfies |TDT|=2.5678%; |ODT|=2.1302%, where TDT is TV distortion; and ODT is optical distortion.
(118) In the present embodiment, the lights of any field of view can be further divided into sagittal ray and tangential ray, and the spatial frequency of 220 cycles/mm serves as the benchmark for assessing the focus shifts and the values of MTF. The focus shifts where the through-focus MTF values of the visible sagittal ray at the central field of view, 0.3 field of view, and 0.7 field of view of the optical image capturing system are at their respective maxima are denoted by VSFS0, VSFS3, and VSFS7 (unit of measurement: mm), respectively. The values of VSFS0, VSFS3, and VSFS7 equal to 0.000 mm, 0.005 mm, and 0.000 mm, respectively. The maximum values of the through-focus MTF of the visible sagittal ray at the central field of view, 0.3 field of view, and 0.7 field of view are denoted by VSMTF0, VSMTF3, and VSMTF7, respectively. The values of VSMTF0, VSMTF3, and VSMTF7 equal to 0.886, 0.885, and 0.863, respectively. The focus shifts where the through-focus MTF values of the visible tangential ray at the central field of view, 0.3 field of view, and 0.7 field of view of the optical image capturing system are at their respective maxima, are denoted by VTFS0, VTFS3, and VTFS7 (unit of measurement: mm), respectively. The values of VTFS0, VTFS3, and VTFS7 equal to 0.000 mm, 0.001 mm, and 0.005 mm, respectively. The maximum values of the through-focus MTF of the visible tangential ray at the central field of view, 0.3 field of view, and 0.7 field of view are denoted by VTMTF0, VTMTF3, and VTMTF7, respectively. The values of VTMTF0, VTMTF3, and VTMTF7 equal to 0.886, 0.868, and 0.796, respectively. The average focus shift (position) of both the aforementioned focus shifts of the visible sagittal ray at three fields of view and focus shifts of the visible tangential ray at three fields of view is denoted by AVFS (unit of measurement: mm), which satisfies the absolute value |(VSFS0+VSFS3+VSFS7+VTFS0+VTFS3+VTFS7)/6|=|0.000 mm|.
(119) The focus shifts where the through-focus MTF values of the infrared sagittal ray at the central field of view, 0.3 field of view, and 0.7 field of view of the optical image capturing system are at their respective maxima, are denoted by ISFS0, ISFS3, and ISFS7 (unit of measurement: mm), respectively. The values of ISFS0, ISFS3, and ISFS7 equal to 0.025 mm, 0.020 mm, and 0.020 mm, respectively. The average focus shift (position) of the aforementioned focus shifts of the infrared sagittal ray at three fields of view is denoted by AISFS (unit of measurement: mm). The maximum values of the through-focus MTF of the infrared sagittal ray at the central field of view, 0.3 field of view, and 0.7 field of view are denoted by ISMTF0, ISMTF3, and ISMTF7, respectively. The values of ISMTF0, ISMTF3, and ISMTF7 equal to 0.787, 0.802, and 0.772, respectively. The focus shifts where the through-focus MTF values of the infrared tangential ray at the central field of view, 0.3 field of view, and 0.7 field of view of the optical image capturing system are at their respective maxima, are denoted by ITFS0, ITFS3, and ITFS7 (unit of measurement: mm), respectively. The values of ITFS0, ITFS3, and ITFS7 equal to 0.025, 0.035, and 0.035, respectively. The average focus shift (position) of the aforementioned focus shifts of the infrared tangential ray at three fields of view is denoted by AITFS (unit of measurement: mm). The maximum values of the through-focus MTF of the infrared tangential ray at the central field of view, 0.3 field of view, and 0.7 field of view are denoted by ITMTF0, ITMTF3, and ITMTF7, respectively. The values of ITMTF0, ITMTF3, and ITMTF7 equal to 0.787, 0.805, and 0.721, respectively. The average focus shift (position) of both of the aforementioned focus shifts of the infrared sagittal ray at the three fields of view and focus shifts of the infrared tangential ray at the three fields of view is denoted by AIFS (unit of measurement: mm), which equals to the absolute value of |(ISFS0+ISFS3+ISFS7+ITFS0+ITFS3+ITFS7)/6|=|0.02667 mm|.
(120) The focus shift (difference) between the focal points of the visible light and the infrared light at their central fields of view (RGB/IR) of the entire optical image capturing system (i.e. wavelength of 850 nm versus wavelength of 555 nm, unit of measurement: mm) is denoted by FS (the distance between the first and second image planes on the optical axis), which satisfies the absolute value |(VSFS0+VTFS0)/2(ISFS0+ITFS0)/2|=|0.025 mm|. The difference (focus shift) between the average focus shift of the visible light in the three fields of view and the average focus shift of the infrared light in the three fields of view (RGB/IR) of the entire optical image capturing system is denoted by AFS (i.e. wavelength of 850 nm versus wavelength of 555 nm, unit of measurement: mm), for which the absolute value of |AIFSAVFS|=|0.02667 mm| is satisfied.
(121) In the optical image capturing system 10 of the first embodiment, a transverse aberration at 0.7 field of view in the positive direction of the tangential fan after the shortest operation wavelength of visible light passing through the edge of the aperture 100 is denoted by PSTA, and is 0.00040 mm; a transverse aberration at 0.7 field of view in the positive direction of the tangential fan after the longest operation wavelength of visible light passing through the edge of the aperture 100 is denoted by PLTA, and is 0.009 mm; a transverse aberration at 0.7 field of view in the negative direction of the tangential fan after the shortest operation wavelength of visible light passing through the edge of the aperture 100 is denoted by NSTA, and is 0.002 mm; a transverse aberration at 0.7 field of view in the negative direction of the tangential fan after the longest operation wavelength of visible light passing through the edge of the aperture 100 is denoted by NLTA, and is 0.016 mm; a transverse aberration at 0.7 field of view of the sagittal fan after the shortest operation wavelength of visible light passing through the edge of the aperture 100 is denoted by SSTA, and is 0.018 mm; a transverse aberration at 0.7 field of view of the sagittal fan after the longest operation wavelength of visible light passing through the edge of the aperture 100 is denoted by SLTA, and is 0.016 mm.
(122) The parameters of the lenses of the first embodiment are listed in Table 1 and Table 2.
(123) TABLE-US-00001 TABLE 1 f = 4.3019 mm; f/HEP = 1.2; HAF = 59.9968 deg Focal Radius of curvature Thickness Refractive Abbe length Surface (mm) (mm) Material index number (mm) 0 Object plane infinity 1 1.sup.st lens 1079.499964 2.276 plastic 1.565 58.00 14.53 2 8.304149657 4.552 3 2.sup.nd lens 14.39130913 5.240 plastic 1.650 21.40 24.25 4 130.0869482 0.162 5 3.sup.rd lens 8.167310118 0.837 plastic 1.650 21.40 97.07 6 6.944477468 1.450 7 Aperture plane 0.477 8 4.sup.th lens 121.5965254 2.002 plastic 1.565 58.00 9.75 9 5.755749302 1.515 10 5.sup.th lens 86.27705938 4.271 plastic 1.565 58.00 7.16 11 3.942936258 0.050 12 6.sup.th lens 4.867364751 0.300 plastic 1.650 21.40 6.52 13 2.220604983 0.211 14 7.sup.th lens 1.892510651 1.118 plastic 1.650 21.40 8.29 15 2.224128115 1.400 16 Infrared plane 0.200 BK_7 1.517 64.2 rays filter 17 plane 0.917 18 Image plane plane Reference wavelength: 555 nm.
(124) TABLE-US-00002 TABLE 2 Coefficients of the aspheric surfaces Surface 1 2 3 4 5 6 8 k 2.500000E+01 4.711931E01 1.531617E+00 1.153034E+01 2.915013E+00 4.886991E+00 3.459463E+01 A4 5.236918E06 2.117558E04 7.146736E05 4.353586E04 5.793768E04 3.756697E04 1.292614E03 A6 3.014384E08 1.838670E06 2.334364E06 1.400287E05 2.112652E04 3.901218E04 1.602381E05 A8 2.487400E10 9.605910E09 7.479362E08 1.688929E07 1.344586E05 4.925422E05 8.452359E06 A10 1.170000E12 8.256000E11 1.701570E09 3.829807E08 1.000482E06 4.139741E06 7.243999E07 A12 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 A14 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 Surface 9 10 11 12 13 14 15 k 7.549291E+00 5.000000E+01 1.740728E+00 4.709650E+00 4.509781E+00 3.427137E+00 3.215123E+00 A4 5.583548E03 1.240671E04 6.467538E04 1.872317E03 8.967310E04 3.189453E03 2.815022E03 A6 1.947110E04 4.949077E05 4.981838E05 1.523141E05 2.688331E05 1.058126E05 1.884580E05 A8 1.486947E05 2.088854E06 9.129031E07 2.169414E06 8.324958E07 1.760103E06 1.017223E08 A10 6.501246E08 1.438383E08 7.108550E09 2.308304E08 6.184250E09 4.730294E08 3.660000E12 A12 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 A14 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00
(125) The figures related to the profile curve lengths obtained based on Table 1 and Table 2 are listed in the following table:
(126) TABLE-US-00003 First embodiment (Reference wavelength: 555 nm) ARE ARE 2(ARE/HEP) ARE/TP ARE (HEP) value (HEP) % TP (%) 11 1.792 1.792 0.00044 99.98% 2.276 78.73% 12 1.792 1.806 0.01319 100.74% 2.276 79.33% 21 1.792 1.797 0.00437 100.24% 5.240 34.29% 22 1.792 1.792 0.00032 99.98% 5.240 34.20% 31 1.792 1.808 0.01525 100.85% 0.837 216.01% 32 1.792 1.819 0.02705 101.51% 0.837 217.42% 41 1.792 1.792 0.00041 99.98% 2.002 89.50% 42 1.792 1.825 0.03287 101.83% 2.002 91.16% 51 1.792 1.792 0.00031 99.98% 4.271 41.96% 52 1.792 1.845 0.05305 102.96% 4.271 43.21% 61 1.792 1.818 0.02587 101.44% 0.300 606.10% 62 1.792 1.874 0.08157 104.55% 0.300 624.67% 71 1.792 1.898 0.10523 105.87% 1.118 169.71% 72 1.792 1.885 0.09273 105.17% 1.118 168.59% ARS ARS (ARS/EHD) ARS/TP ARS EHD value EHD % TP (%) 11 15.095 15.096 0.001 100.01% 2.276 663.24% 12 10.315 11.377 1.062 110.29% 2.276 499.86% 21 7.531 8.696 1.166 115.48% 5.240 165.96% 22 4.759 4.881 0.122 102.56% 5.240 93.15% 31 3.632 4.013 0.382 110.51% 0.837 479.55% 32 2.815 3.159 0.344 112.23% 0.837 377.47% 41 2.967 2.971 0.004 100.13% 2.002 148.38% 42 3.402 3.828 0.426 112.53% 2.002 191.20% 51 4.519 4.523 0.004 100.10% 4.271 105.91% 52 5.016 5.722 0.706 114.08% 4.271 133.99% 61 5.019 5.823 0.805 116.04% 0.300 1941.14% 62 5.629 6.605 0.976 117.34% 0.300 2201.71% 71 5.634 6.503 0.869 115.43% 1.118 581.54% 72 6.488 7.152 0.664 110.24% 1.118 639.59%
(127) The detail parameters of the first embodiment are listed in Table 1, in which the unit of the radius of curvature, thickness, and focal length are millimeter, and surface 0-10 indicates the surfaces of all elements in the system in sequence from the object side to the image side. Table 2 is the list of coefficients of the aspheric surfaces, in which A1-A20 indicate the coefficients of aspheric surfaces from the first order to the twentieth order of each aspheric surface. The following embodiments have the similar diagrams and tables, which are the same as those of the first embodiment, so we do not describe it again.
Second Embodiment
(128) As shown in
(129) The first lens 210 has negative refractive power and is made of glass. An object-side surface 212 thereof, which faces the object side, is a convex aspheric surface, and an image-side surface 214 thereof, which faces the image side, is a concave aspheric surface.
(130) The second lens 220 has negative refractive power and is made of glass. An object-side surface 222 thereof, which faces the object side, is a convex aspheric surface, and an image-side surface 224 thereof, which faces the image side, is a concave aspheric surface.
(131) The third lens 230 has positive refractive power and is made of glass. An object-side surface 232, which faces the object side, is a concave aspheric surface, and an image-side surface 234, which faces the image side, is a convex aspheric surface.
(132) The fourth lens 240 has positive refractive power and is made of glass. An object-side surface 242, which faces the object side, is a convex aspheric surface, and an image-side surface 244, which faces the image side, is a convex aspheric surface.
(133) The fifth lens 250 has negative refractive power and is made of glass. An object-side surface 252, which faces the object side, is a concave aspheric surface, and an image-side surface 254, which faces the image side, is a concave aspheric surface. The object-side surface 252 has an inflection point.
(134) The sixth lens 260 has positive refractive power and is made of glass. An object-side surface 262, which faces the object side, is a convex aspheric surface, and an image-side surface 264, which faces the image side, is a convex aspheric surface. Whereby, the incident angle of each view field could be adjusted to improve aberration.
(135) The seventh lens 270 has negative refractive power and is made of plastic. An object-side surface 272, which faces the object side, is a convex aspheric surface, and an image-side surface 274, which faces the image side, is a concave aspheric surface. The object-side surface 272 has an inflection point, and the image-side surface 274 has two inflection points. It may help to shorten the back focal length to keep small in size. In addition, it may reduce an incident angle of the light of an off-axis field of view and correct the aberration of the off-axis field of view.
(136) The infrared rays filter 280 is made of glass and between the seventh lens 270 and the image plane 290. The infrared rays filter 280 gives no contribution to the focal length of the system.
(137) The parameters of the lenses of the second embodiment are listed in Table 3 and Table 4.
(138) TABLE-US-00004 TABLE 3 f = 2.9939 mm; f/HEP = 1.6; HAF = 100 deg Focal Radius of curvature Thickness Refractive Abbe length Surface (mm) (mm) Material index number (mm) 0 Object 1E+18 1E+18 1 1.sup.st lens 41.92839302 5.803 glass 1.702 41.15 24.342 2 11.47631436 7.841 3 2.sup.nd lens 18.81433042 0.911 glass 1.882 37.22 15.058 4 7.630116852 8.965 5 3.sup.rd lens 21.08840147 16.749 glass 1.923 20.88 35.065 6 17.7158751 10.061 7 Aperture 1E+18 0.200 8 4.sup.th lens 9.66596437 3.564 glass 1.583 59.46 9.474 9 11.21858218 0.200 10 5.sup.th lens 44.0820068 0.863 glass 1.923 20.88 9.037 11 10.49260784 1.201 12 6.sup.th lens 9.186649337 6.184 glass 1.553 71.68 12.009 13 18.41648295 0.117 14 7.sup.th lens 14.07670086 0.500 plastic 1.643 22.47 92.711 15 11.24405549 4.840 16 Infrared 1E+18 1.000 BK_7 1.517 64.2 rays filter 17 1E+18 1.013 18 Image 1E+18 0.013 plane Reference wavelength: 555 nm; the position of blocking light: none.
(139) TABLE-US-00005 TABLE 4 Coefficients of the aspheric surfaces Surface 1 2 3 4 5 6 8 k 3.527462E01 2.426472E01 0.000000E+00 0.000000E+00 0.000000E+00 4.388300E01 1.000000E+00 A4 6.593757E08 8.186690E05 1.232319E05 1.701808E04 6.398095E05 3.283548E06 3.411462E05 A6 1.293185E09 2.119346E07 5.790714E08 1.775052E06 1.378056E08 6.446245E08 1.301464E06 A8 1.581778E13 9.520071E21 3.350727E10 1.413708E17 7.174936E10 3.879021E11 4.562410E08 A10 5.317944E16 5.727197E25 9.328010E14 5.362004E22 2.119181E11 2.394856E12 2.025042E09 A12 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 Surface 9 10 11 12 13 14 15 k 8.096204E01 7.056286E01 8.048996E01 0.000000E+00 0.000000E+00 7.996445E01 2.805483E01 A4 6.391967E04 1.457768E04 1.247646E04 8.467622E05 4.064439E05 2.135766E04 5.291170E04 A6 9.887468E06 3.878285E06 1.082581E06 5.724168E07 4.123727E08 1.309630E04 1.500879E04 A8 5.119961E08 1.924083E07 7.213805E08 8.990285E08 1.980924E07 2.516758E06 4.054295E06 A10 4.804411E10 2.094605E09 3.340129E09 6.671300E10 3.987454E09 7.85001E09 2.706527E08 A12 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00
(140) An equation of the aspheric surfaces of the second embodiment is the same as that of the first embodiment, and the definitions are the same as well.
(141) The exact parameters of the second embodiment based on Table 3 and Table 4 are listed in the following table:
(142) TABLE-US-00006 Second embodiment (Reference wavelength: 555 nm) |f/f1| |f/f2| |f/f3| |f/f4| |f/f5| |f/f6| 0.1230 0.1988 0.0854 0.3160 0.3313 0.2493 |f/f7| PPR NPR PPR/|NPR| IN12/f IN67/f 0.0323 0.7737 0.5624 1.3757 2.6190 0.0391 |f1/f2| |f2/f3| (TP1 + IN12)/TP2 (TP7 + IN67)/TP6 1.6166 0.4294 14.9807 0.0998 HOS InTL HOS/HOI InS/HOS ODT % TDT % 70.0001 63.1602 11.6667 0.2810 135.2980 93.1001 HVT11 HVT12 HVT21 HVT22 HVT31 HVT32 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 HVT61 HVT62 HVT71 HVT72 HVT72/HOI HVT72/HOS 0.0000 0.0000 3.5467 4.3991 0.7332 0.0628 PSTA PLTA NSTA NLTA SSTA SLTA 0.019 mm 0.002 mm 0.00016 mm 0.001 mm 0.009 mm 0.002 mm VSFS0 VSFS3 VSFS7 VTFS0 VTFS3 VTFS7 0.005 mm 0.000 mm 0.000 mm 0.005 mm 0.005 mm 0.000 mm VSMTF0 VSMTF3 VSMTF7 VTMTF0 VTMTF3 VTMTF7 0.575 0.546 0.607 0.575 0.427 0.592 ISFS0 ISFS3 ISFS7 ITFS0 ITFS3 ITFS7 0.005 mm 0.005 mm 0.005 mm 0.005 mm 0.010 mm 0.030 mm ISMTF0 ISMTF3 ISMTF7 ITMTF0 ITMTF3 ITMTF7 0.742 0.749 0.668 0.742 0.734 0.740 FS AIFS AVFS AFS 0.000 mm 0.010 mm 0.003 mm 0.008 mm
(143) The figures related to the profile curve lengths obtained based on Table 3 and Table 4 are listed in the following table:
(144) TABLE-US-00007 Second embodiment (Reference wavelength: 555 nm) ARE ARE 2(ARE/HEP) ARE/TP ARE (HEP) value (HEP) % TP (%) 11 0.921 0.921 0.00012 99.99% 5.803 15.87% 12 0.921 0.922 0.00080 100.09% 5.803 15.89% 21 0.921 0.921 0.00018 100.02% 0.911 101.16% 22 0.921 0.923 0.00207 100.22% 0.911 101.37% 31 0.921 0.921 0.00010 100.01% 16.749 5.50% 32 0.921 0.921 0.00022 100.02% 16.749 5.50% 41 0.921 0.922 0.00120 100.13% 3.564 25.88% 42 0.921 0.922 0.00081 100.09% 3.564 25.87% 51 0.921 0.921 0.00013 99.99% 0.863 106.71% 52 0.921 0.922 0.00098 100.11% 0.863 106.84% 61 0.921 0.923 0.00135 100.15% 6.184 14.92% 62 0.921 0.921 0.00019 100.02% 6.184 14.90% 71 0.921 0.922 0.00047 100.05% 0.500 184.33% 72 0.921 0.922 0.00086 100.09% 0.500 184.41% ARS ARS (ARS/EHD) ARS/TP ARS EHD value EHD % TP (%) 11 31.726 36.519 4.793 115.11% 5.803 629.34% 12 13.145 20.033 6.888 152.40% 5.803 345.24% 21 12.785 13.941 1.156 109.04% 0.911 1530.70% 22 7.611 11.607 3.996 152.50% 0.911 1274.47% 31 7.607 7.849 0.241 103.17% 16.749 46.86% 32 8.940 9.322 0.382 104.27% 16.749 55.66% 41 4.803 4.981 0.178 103.70% 3.564 139.76% 42 4.914 5.001 0.087 101.77% 3.564 140.32% 51 4.864 4.868 0.004 100.08% 0.863 564.00% 52 4.849 5.000 0.152 103.13% 0.863 579.34% 61 5.847 6.325 0.479 108.19% 6.184 102.28% 62 5.579 5.676 0.097 101.74% 6.184 91.79% 71 5.299 5.418 0.119 102.25% 0.500 1083.56% 72 5.369 5.407 0.038 100.71% 0.500 1081.45%
(145) The results of the equations of the second embodiment based on Table 3 and Table 4 are listed in the following table:
(146) TABLE-US-00008 Values related to the inflection points of the second embodiment (Reference wavelength: 555 nm) HIF511 3.4296 HIF511/HOI 0.5716 SGI511 0.1102 |SGI511|/(|SGI511| + TP5) 0.1132 HIF711 2.3035 HIF711/HOI 0.3839 SGI711 0.1792 |SGI711|/(|SGI711| + TP7) 0.2639 HIF721 2.6087 HIF721/HOI 0.4348 SGI721 0.2935 |SGI721|/(|SGI721| + TP7) 0.3699 HIF722 4.8478 HIF722/HOI 0.8080 SGI722 0.5028 |SGI722|/(|SGI722| + TP7) 0.5014
Third Embodiment
(147) As shown in
(148) The first lens 310 has negative refractive power and is made of glass. An object-side surface 312 thereof, which faces the object side, is a convex aspheric surface, and an image-side surface 314 thereof, which faces the image side, is a concave aspheric surface.
(149) The second lens 320 has negative refractive power and is made of glass. An object-side surface 322 thereof, which faces the object side, is a convex aspheric surface, and an image-side surface 324 thereof, which faces the image side, is a concave aspheric surface. The object-side surface 322 has an inflection point.
(150) The third lens 330 has positive refractive power and is made of glass. An object-side surface 332 thereof, which faces the object side, is a concave aspheric surface, and an image-side surface 334 thereof, which faces the image side, is a convex aspheric surface.
(151) The fourth lens 340 has positive refractive power and is made of glass. An object-side surface 342, which faces the object side, is a convex aspheric surface, and an image-side surface 344, which faces the image side, is a convex aspheric surface.
(152) The fifth lens 350 has negative refractive power and is made of plastic. An object-side surface 352, which faces the object side, is a convex aspheric surface, and an image-side surface 354, which faces the image side, is a concave aspheric surface. The object-side surface 352 and the image-side surface 354 both have an inflection point. It may help to shorten the back focal length to keep small in size.
(153) The sixth lens 360 has positive refractive power and is made of plastic. An object-side surface 362, which faces the object side, is a convex aspheric surface, and an image-side surface 364, which faces the image side, is a convex aspheric surface. Whereby, the incident angle of each view field could be adjusted to improve aberration.
(154) The seventh lens 370 has negative refractive power and is made of plastic. An object-side surface 372, which faces the object side, is a concave aspheric surface, and an image-side surface 374, which faces the image side, is a concave aspheric surface. It may help to shorten the back focal length to keep small in size. In addition, it may reduce an incident angle of the light of an off-axis field of view and correct the aberration of the off-axis field of view.
(155) The infrared rays filter 380 is made of glass and between the seventh lens 370 and the image plane 390. The infrared rays filter 380 gives no contribution to the focal length of the system.
(156) The parameters of the lenses of the third embodiment are listed in Table 5 and Table 6.
(157) TABLE-US-00009 TABLE 5 f = 3.1680 mm; f/HEP = 1.6; HAF = 100 deg Focal Radius of curvature Thickness Refractive Abbe length Surface (mm) (mm) Material index number (mm) 0 Object 1E+18 1E+18 1 1.sup.st lens 87.02777231 12.704 glass 1.593 68.62 36.921 2 16.57257815 13.034 3 2.sup.nd lens 32.57874755 0.911 glass 2.001 29.13 11.306 4 8.319427612 8.327 5 3.sup.rd lens 31.71101734 15.837 glass 2.002 19.32 33.685 6 20.54322186 13.421 7 Aperture 1E+18 0.246 8 4.sup.th lens 9.409945021 3.215 glass 1.517 64.20 11.394 9 14.0061341 0.200 10 5.sup.th lens 156.7944101 0.500 glass 2.002 19.32 11.254 11 10.59043283 1.514 12 6.sup.th lens 8.092427896 5.943 plastic 1.544 55.96 10.776 13 15.94241774 0.050 14 7.sup.th lens 142.1261659 1.807 plastic 1.661 20.40 34.689 15 27.76756583 5.211 16 Infrared 1E+18 1.000 BK_7 1.517 64.2 rays filter 17 1E+18 1.007 18 Image 1E+18 0.008 plane Reference wavelength: 555 nm; the position of blocking light: none.
(158) Table 6 Coefficients of the aspheric surfaces
(159) TABLE-US-00010 Surface 1 2 3 4 5 6 8 k 9.994640E01 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 9.997027E01 9.842439E01 A4 5.323689E07 3.668145E05 8.269482E05 1.291646E04 1.789001E04 1.268020E05 2.158921E04 A6 2.063924E11 1.482266E09 2.049930E07 2.270184E06 2.075647E07 2.792729E07 2.084476E06 A8 3.604070E14 9.005003E17 3.093643E10 1.964108E08 1.973919E09 4.602672E10 8.469103E08 A10 7.693800E18 8.039533E22 4.354415E13 6.620269E13 8.452814E13 5.457441E13 1.683112E09 A12 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 A14 9.994640E01 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 9.997027E01 9.842439E01 Surface 9 10 11 12 13 14 15 k 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 9.449169E01 0.000000E+00 A4 7.094612E04 2.885560E04 3.825028E04 4.947782E04 1.033630E04 1.287691E04 2.821415E05 A6 1.743261E05 1.024236E05 1.110316E06 3.452597E06 1.936606E06 8.243134E06 3.839053E06 A8 2.944941E07 2.658374E08 6.546523E08 5.840322E09 1.323358E08 9.656849E08 8.595996E08 A10 2.439009E09 1.045008E09 3.475710E10 8.151859E10 1.090334E09 2.820589E10 4.013457E09 A12 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 A14 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 9.449169E01 0.000000E+00
(160) An equation of the aspheric surfaces of the third embodiment is the same as that of the first embodiment, and the definitions are the same as well.
(161) The exact parameters of the third embodiment based on Table 5 and Table 6 are listed in the following table:
(162) TABLE-US-00011 Third embodiment (Reference wavelength: 555 nm) |f/f1| |f/f2| |f/f3| |f/f4| |f/f5| |f/f6| 0.0858 0.2802 0.0940 0.2780 0.2815 0.2940 |f/f7| PPR NPR PPR/|NPR| IN12/f IN67/f 0.0913 0.7519 0.6530 1.1513 4.1145 0.0158 |f1/f2| |f2/f3| (TP1 + IN12)/TP2 (TP7 + IN67)/TP6 3.2657 0.3356 28.2665 0.3125 HOS InTL HOS/HOI InS/HOS ODT % TDT % 84.9201 77.7097 14.1534 0.2436 124.9210 78.1265 HVT11 HVT12 HVT21 HVT22 HVT31 HVT32 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 HVT61 HVT62 HVT71 HVT72 HVT72/HOI HVT72/HOS 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 PSTA PLTA NSTA NLTA SSTA SLTA 0.007 mm 0.004 mm 0.002 mm 0.010 mm 0.013 mm 0.004 mm VSFS0 VSFS3 VSFS7 VTFS0 VTFS3 VTFS7 0.005 mm 0.010 mm 0.010 mm 0.005 mm 0.005 mm 0.010 mm VSMTF0 VSMTF3 VSMTF7 VTMTF0 VTMTF3 VTMTF7 0.444 0.400 0.415 0.444 0.418 0.494 ISFS0 ISFS3 ISFS7 ITFS0 ITFS3 ITFS7 0.000 mm 0.025 mm 0.020 mm 0.000 mm 0.000 mm 0.035 mm ISMTF0 ISMTF3 ISMTF7 ITMTF0 ITMTF3 ITMTF7 0.328 0.299 0.378 0.328 0.380 0.424 FS AIFS AVFS AFS 0.005 mm 0.002 mm 0.008 mm 0.006 mm
(163) The figures related to the profile curve lengths obtained based on Table 5 and Table 6 are listed in the following table:
(164) TABLE-US-00012 Third embodiment (Reference wavelength: 555 nm) ARE 1/2(HEP) ARE value ARE-1/2(HEP) 2(ARE/HEP) % TP ARE/TP (%) 11 0.960 0.960 0.00005 100.00% 12.704 7.56% 12 0.960 0.961 0.00047 100.05% 12.704 7.56% 21 0.960 0.960 0.00007 100.01% 0.911 105.44% 22 0.960 0.962 0.00207 100.22% 0.911 105.66% 31 0.960 0.960 0.00008 100.01% 15.837 6.06% 32 0.960 0.960 0.00028 100.03% 15.837 6.06% 41 0.960 0.962 0.00158 100.16% 3.215 29.91% 42 0.960 0.961 0.00065 100.07% 3.215 29.88% 51 0.960 0.960 0.00006 99.99% 0.500 191.98% 52 0.960 0.961 0.00123 100.13% 0.500 192.24% 61 0.960 0.962 0.00216 100.22% 5.943 16.19% 62 0.960 0.961 0.00051 100.05% 5.943 16.16% 71 0.960 0.960 0.00006 99.99% 1.807 53.13% 72 0.960 0.960 0.00013 100.01% 1.807 53.14% ARS EHD ARS value ARS-EHD (ARS/EHD) % TP ARS/TP (%) 11 58.469 66.605 8.136 113.91% 12.704 524.27% 12 16.365 25.563 9.198 156.21% 12.704 201.21% 21 12.936 13.665 0.729 105.63% 0.911 1500.68% 22 8.170 11.266 3.095 137.89% 0.911 1237.19% 31 8.134 8.420 0.286 103.51% 15.837 53.16% 32 10.350 10.892 0.542 105.24% 15.837 68.78% 41 5.092 5.298 0.206 104.04% 3.215 164.79% 42 5.203 5.260 0.057 101.09% 3.215 163.59% 51 5.224 5.226 0.001 100.02% 0.500 1045.01% 52 5.265 5.390 0.126 102.38% 0.500 1077.92% 61 6.345 6.921 0.576 109.08% 5.943 116.46% 62 6.091 6.221 0.131 102.14% 5.943 104.69% 71 5.815 5.849 0.034 100.59% 1.807 323.73% 72 5.537 5.598 0.061 101.09% 1.807 309.82%
(165) The results of the equations of the third embodiment based on Table 5 and Table 6 are listed in the following table:
(166) TABLE-US-00013 Values related to the inflection points of the third embodiment (Reference wavelength: 555 nm) HIF211 11.7034 HIF211/HOI 1.9506 SGI211 3.0695 |SGI211|/(|SGI211| + TP2) 0.7712 HIF511 3.5701 HIF511/HOI 0.5950 SGI511 0.0660 |SGI511|/(|SGI511| + TP5) 0.1165 HIF512 4.4304 HIF512/HOI 0.7384 SGI512 0.8068 |SGI512|/(|SGI512| + TP5) 0.6174
Fourth Embodiment
(167) As shown in
(168) The first lens 410 has negative refractive power and is made of glass. An object-side surface 412 thereof, which faces the object side, is a convex aspheric surface, and an image-side surface 414 thereof, which faces the image side, is a concave aspheric surface.
(169) The second lens 420 has negative refractive power and is made of glass. An object-side surface 422 thereof, which faces the object side, is a convex aspheric surface, and an image-side surface 424 thereof, which faces the image side, is a concave aspheric surface.
(170) The third lens 430 has positive refractive power and is made of glass. An object-side surface 432 thereof, which faces the object side, is a concave aspheric surface, and an image-side surface 434 thereof, which faces the image side, is a convex aspheric surface.
(171) The fourth lens 440 has positive refractive power and is made of glass. An object-side surface 442, which faces the object side, is a convex aspheric surface, and an image-side surface 444, which faces the image side, is a convex aspheric surface.
(172) The fifth lens 450 has negative refractive power and is made of plastic. An object-side surface 452, which faces the object side, is a concave aspheric surface, and an image-side surface 454, which faces the image side, is a concave aspheric surface. The image-side surface 452 has two inflection points.
(173) The sixth lens 460 has positive refractive power and is made of plastic. An object-side surface 462, which faces the object side, is a convex aspheric surface, and an image-side surface 464, which faces the image side, is a convex aspheric surface. Whereby, the incident angle of each view field could be adjusted to improve aberration.
(174) The seventh lens 470 has negative refractive power and is made of plastic. An object-side surface 472, which faces the object side, is a concave aspheric surface, and an image-side surface 474, which faces the image side, is a convex aspheric surface. It may help to shorten the back focal length to keep small in size. In addition, the object-side surface 472 and the image-side surface 474 both have an inflection point, which may reduce an incident angle of the light of an off-axis field of view and correct the aberration of the off-axis field of view.
(175) The infrared rays filter 480 is made of glass and between the seventh lens 470 and the image plane 490. The infrared rays filter 480 gives no contribution to the focal length of the system.
(176) The parameters of the lenses of the fourth embodiment are listed in Table 7 and Table 8.
(177) TABLE-US-00014 TABLE 7 f = 2.5946 mm; f/HEP = 1.6; HAF = 100 deg Focal Radius of curvature Thickness Refractive Abbe length Surface (mm) (mm) Material index number (mm) 0 Object 1E+18 1E+18 1 1.sup.st lens 321.4308977 21.000 glass 1.497 81.56 69.234 2 30.47428025 30.268 3 2.sup.nd lens 90.26309328 9.538 glass 2.001 29.13 11.067 4 9.395277256 9.062 5 3.sup.rd lens 34.70439931 21.000 glass 2.002 19.32 30.544 6 21.31088764 14.232 7 Aperture 1E+18 0.548 8 4.sup.th lens 12.49869625 2.689 glass 1.592 67.02 10.115 9 10.63133622 0.200 10 5.sup.th lens 15.28705691 2.341 plastic 1.661 20.40 10.185 11 12.96928497 0.555 12 6.sup.th lens 10.09155631 4.122 plastic 1.544 55.96 10.686 13 11.82446889 0.535 14 7.sup.th lens 9.909711633 1.745 plastic 1.661 20.40 54.272 15 14.60810155 4.966 16 Infrared 1E+18 1.000 BK_7 1.517 64.2 rays filter 17 1E+18 1.017 18 Image 1E+18 0.017 plane Reference wavelength: 555 nm; the position of blocking light: none.
(178) TABLE-US-00015 TABLE 8 Coefficients of the aspheric surfaces Surface 1 2 3 4 5 6 8 k 8.728647E01 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 3.002993E01 1.000000E+00 A4 2.658863E07 4.156391E06 1.056273E05 1.509824E04 8.590287E05 1.177802E05 3.637741E05 A6 2.359851E11 3.008587E08 1.365533E08 1.558340E06 4.245225E07 5.812455E08 4.065190E06 A8 1.179863E15 2.178626E11 9.300297E12 4.951255E09 1.980683E09 2.490950E10 1.210052E07 A10 1.126140E20 9.446200E28 5.247197E16 6.343405E11 5.400693E12 1.979960E13 8.772488E10 A12 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 Surface 9 10 11 12 13 14 15 k 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 9.997298E01 A4 1.059277E03 9.369986E04 2.446991E05 2.201359E04 1.434490E04 9.910535E04 1.224827E03 A6 2.037991E05 1.094731E05 6.011490E06 1.613490E06 1.150827E06 5.846579E06 1.036570E06 A8 3.456524E07 6.735267E08 2.294688E07 5.316143E08 6.257959E08 5.909459E10 2.604750E07 A10 2.914910E09 1.454000E10 1.270803E09 8.749138E10 2.601915E10 1.232999E09 7.488591E09 A12 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00
(179) An equation of the aspheric surfaces of the fourth embodiment is the same as that of the first embodiment, and the definitions are the same as well.
(180) The exact parameters of the fourth embodiment based on Table 7 and Table 8 are listed in the following table:
(181) TABLE-US-00016 Fourth embodiment (Reference wavelength: 555 nm) |f/f1| |f/f2| |f/f3| |f/f4| |f/f5| |f/f6| 0.0375 0.2344 0.0849 0.2565 0.2547 0.2428 |f/f7| PPR NPR PPR/|NPR| IN12/f IN67/f 0.0478 0.6217 0.5370 1.1578 11.6657 0.2061 |f1/f2| |f2/f3| (TP1 + IN12)/TP2 (TP7 + IN67)/TP6 6.2560 0.3623 5.3753 0.5531 HOS InTL HOS/HOI InS/HOS ODT % TDT % 124.8010 117.8340 20.8002 0.1579 140.7650 77.6837 HVT11 HVT12 HVT21 HVT22 HVT31 HVT32 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 HVT61 HVT62 HVT71 HVT72 HVT72/HOI HVT72/HOS 0.0000 0.0000 0.0000 3.9383 0.6564 0.0316 PSTA PLTA NSTA NLTA SSTA SLTA 0.010 mm 0.009 mm 0.004 mm 0.013 mm 0.016 mm 0.007 mm VSFS0 VSFS3 VSFS7 VTFS0 VTFS3 VTFS7 0.000 mm 0.005 mm 0.005 mm 0.000 mm 0.005 mm 0.000 mm VSMTF0 VSMTF3 VSMTF7 VTMTF0 VTMTF3 VTMTF7 0.632 0.583 0.497 0.632 0.575 0.479 ISFS0 ISFS3 ISFS7 ITFS0 ITFS3 ITFS7 0.010 mm 0.000 mm 0.020 mm 0.010 mm 0.010 mm 0.025 mm ISMTF0 ISMTF3 ISMTF7 ITMTF0 ITMTF3 ITMTF7 0.595 0.454 0.303 0.595 0.466 0.268 FS AIFS AVFS AFS 0.010 mm 0.003 mm 0.001 mm 0.002 mm
(182) The figures related to the profile curve lengths obtained based on Table 7 and Table 8 are listed in the following table:
(183) TABLE-US-00017 Fourth embodiment (Reference wavelength: 555 nm) ARE 1/2(HEP) ARE value ARE-1/2(HEP) 2(ARE/HEP) % TP ARE/TP (%) 11 0.811 0.810 0.00083 99.90% 21.000 3.86% 12 0.811 0.810 0.00074 99.91% 21.000 3.86% 21 0.811 0.810 0.00082 99.90% 9.538 8.49% 22 0.811 0.811 0.00017 100.02% 9.538 8.50% 31 0.811 0.810 0.00076 99.91% 21.000 3.86% 32 0.811 0.810 0.00064 99.92% 21.000 3.86% 41 0.811 0.811 0.00027 99.97% 2.689 30.15% 42 0.811 0.811 0.00007 99.99% 2.689 30.15% 51 0.811 0.810 0.00047 99.94% 2.341 34.62% 52 0.811 0.811 0.00030 99.96% 2.341 34.63% 61 0.811 0.811 0.00003 100.00% 4.122 19.67% 62 0.811 0.811 0.00019 99.98% 4.122 19.66% 71 0.811 0.811 0.00004 100.01% 1.745 46.46% 72 0.811 0.810 0.00044 99.95% 1.745 46.44% ARS EHD ARS value ARS-EHD (ARS/EHD)% TP ARS/TP (%) 11 114.351 126.395 12.043 110.53% 21.000 601.88% 12 29.764 50.253 20.488 168.84% 21.000 239.30% 21 24.068 24.879 0.811 103.37% 9.538 260.85% 22 9.264 12.649 3.384 136.53% 9.538 132.62% 31 9.218 9.439 0.222 102.40% 21.000 44.95% 32 11.653 12.252 0.600 105.15% 21.000 58.34% 41 4.759 4.859 0.101 102.12% 2.689 180.72% 42 4.884 4.955 0.071 101.46% 2.689 184.27% 51 4.914 4.935 0.022 100.44% 2.341 210.86% 52 5.231 5.393 0.162 103.10% 2.341 230.41% 61 5.743 5.995 0.253 104.40% 4.122 145.44% 62 5.833 6.154 0.322 105.51% 4.122 149.30% 71 5.561 5.643 0.082 101.48% 1.745 323.33% 72 5.373 5.406 0.033 100.62% 1.745 309.79%
(184) The results of the equations of the fourth embodiment based on Table 7 and Table 8 are listed in the following table:
(185) TABLE-US-00018 Values related to the inflection points of the fourth embodiment (Reference wavelength: 555 nm) HIF511 2.8984 HIF511/HOI 0.4831 SGI511 0.2180 |SGI511|/(|SGI511| + TP5) 0.0852 HIF512 4.2830 HIF512/HOI 0.7138 SGI512 0.3718 |SGI512|/(|SGI512| + TP5) 0.1371 HIF711 3.5328 HIF711/HOI 0.5888 SGI711 0.5077 |SGI711|/(|SGI711| + TP7) 0.2254 HIF721 2.2481 HIF721/HOI 0.3747 SGI721 0.1438 |SGI721|/(|SGI721| + TP7) 0.0761
Fifth Embodiment
(186) As shown in
(187) The first lens 510 has negative refractive power and is made of glass. An object-side surface 512, which faces the object side, is a convex aspheric surface, and an image-side surface 514, which faces the image side, is a concave aspheric surface.
(188) The second lens 520 has negative refractive power and is made of glass. An object-side surface 522 thereof, which faces the object side, is a concave aspheric surface, and an image-side surface 524 thereof, which faces the image side, is a concave aspheric surface. The object-side surface 522 has an inflection point.
(189) The third lens 530 has positive refractive power and is made of glass. An object-side surface 532, which faces the object side, is a convex aspheric surface, and an image-side surface 534, which faces the image side, is a convex aspheric surface. The object-side surface 532 has an inflection point.
(190) The fourth lens 540 has positive refractive power and is made of plastic. An object-side surface 542, which faces the object side, is a convex aspheric surface, and an image-side surface 544, which faces the image side, is a convex aspheric surface. The object-side surface 542 has an inflection point.
(191) The fifth lens 550 has negative refractive power and is made of plastic. An object-side surface 552, which faces the object side, is a concave aspheric surface, and an image-side surface 554, which faces the image side, is a concave aspheric surface. The object-side surface 552 has an inflection point, and the image-side surface 554 has two inflection points.
(192) The sixth lens 560 has positive refractive power and is made of plastic. An object-side surface 562, which faces the object side, is a convex aspheric surface, and an image-side surface 564, which faces the image side, is a convex aspheric surface. The object-side surface 562 has an inflection point. Whereby, the incident angle of each view field could be adjusted to improve aberration.
(193) The seventh lens 570 has negative refractive power and is made of plastic. An object-side surface 572, which faces the object side, is a concave surface, and an image-side surface 574, which faces the image side, is a convex surface. The object-side surface 572 and the image-side surface 574 both have an inflection point. It may help to shorten the back focal length to keep small in size. In addition, it may reduce an incident angle of the light of an off-axis field of view and correct the aberration of the off-axis field of view.
(194) The infrared rays filter 570 is made of glass and between the seventh lens 570 and the image plane 590. The infrared rays filter 570 gives no contribution to the focal length of the system.
(195) The parameters of the lenses of the fifth embodiment are listed in Table 9 and Table 10.
(196) TABLE-US-00019 TABLE 9 f = 2.5476 mm; f/HEP = 1.6; HAF = 100 deg Focal Radius of curvature Thickness Refractive Abbe length Surface (mm) (mm) Material index number (mm) 0 Object 1E+18 1E+18 1 1.sup.st lens 422.3797336 5.325 glass 2.001 29.13 21.134 2 20.13645672 16.735 3 2.sup.nd lens 46.67535661 9.362 glass 1.497 81.56 13.921 4 8.689511396 12.420 5 3.sup.rd lens 116.1534168 9.496 glass 2.002 19.32 24.018 6 29.43764072 7.460 7 Aperture 1E+18 0.225 8 4.sup.th lens 9.828482715 2.521 plastic 1.544 55.96 9.466 9 9.905556538 0.200 10 5.sup.th lens 21.8759728 0.654 plastic 1.661 20.40 6.474 11 5.442205584 0.224 12 6.sup.th lens 5.60942038 4.264 plastic 1.544 55.96 6.889 13 8.340838485 0.382 14 7.sup.th lens 8.229570064 0.546 plastic 1.661 20.40 21.813 15 19.45624788 6.478 16 Infrared 1E+18 1.550 BK_7 1.517 64.2 rays filter 17 1E+18 0.461 18 Image 1E+18 0.010 plane Reference wavelength: 555 nm; the position of blocking light: the effective half diameter of the clear aperture of the first surface is 39.000 mm; the effective diameter of the clear aperture of the thirteenth surface is 4.490 mm.
(197) TABLE-US-00020 TABLE 10 Coefficients of the aspheric surfaces Surface 1 2 3 4 5 6 8 k 4.654639E+01 0.000000E+00 0.000000E+00 0.000000E+00 7.863171E+01 4.823853E+00 1.560618E+01 A4 6.232796E06 2.302790E05 2.494173E05 9.560846E05 1.209355E04 1.299938E04 1.253604E03 A6 1.339705E09 2.589581E08 2.240256E08 6.662419E07 3.207299E07 9.851989E07 7.863244E05 A8 4.409286E14 1.589886E11 7.427334E12 6.536767E09 1.077777E08 6.266384E09 3.372428E06 A10 2.394721E18 3.293961E14 9.021052E15 1.838658E10 6.816150E11 6.526565E12 1.010607E07 A12 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 Surface 9 10 11 12 13 14 15 k 3.163401E01 0.000000E+00 2.150698E01 7.709144E02 3.672865E01 1.982630E01 5.502533E+00 A4 2.647003E03 1.302192E03 3.782007E03 2.751315E03 5.207225E04 5.584642E05 8.575613E04 A6 1.936000E04 1.674594E04 6.098017E05 4.948233E05 2.677209E05 6.710895E05 6.401309E05 A8 6.959131E06 6.869099E06 6.292110E08 4.567442E07 8.972603E08 6.813027E06 5.712426E06 A10 1.143419E07 7.655374E08 2.420471E08 9.587696E08 1.241054E08 9.729343E08 8.137282E08 A12 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00
(198) An equation of the aspheric surfaces of the fifth embodiment is the same as that of the first embodiment, and the definitions are the same as well.
(199) The exact parameters of the fifth embodiment based on Table 9 and Table 10 are listed in the following table:
(200) TABLE-US-00021 Fifth embodiment (Reference wavelength: 555 nm) |f/f1| |f/f2| |f/f3| |f/f4| |f/f5| |f/f6| 0.1205 0.1830 0.1061 0.2691 0.3935 0.3698 |f/f7| PPR NPR PPR/|NPR| IN12/f IN67/f 0.1168 0.8656 0.6933 1.2484 6.5689 0.1499 |f1/f2| |f2/f3| (TP1 + IN12)/TP2 (TP7 + IN67)/TP6 1.5181 0.5796 2.3564 0.2176 HOS InTL HOS/HOI InS/HOS ODT % TDT % 78.2920 69.8134 13.0487 0.2234 141.5220 97.9379 HVT11 HVT12 HVT21 HVT22 HVT31 HVT32 0.0000 0.0000 0.0000 0.0000 4.2961 0.0000 HVT61 HVT62 HVT71 HVT72 HVT72/HOI HVT72/HOS 0.0000 0.0000 0.0000 3.6284 0.6047 0.0463 PSTA PLTA NSTA NLTA SSTA SLTA 0.014 mm 0.002 mm 0.002 mm 0.014 mm 0.017 mm 0.004 mm VSFS0 VSFS3 VSFS7 VTFS0 VTFS3 VTFS7 0.005 mm 0.005 mm 0.000 mm 0.005 mm 0.005 mm 0.020 mm VSMTF0 VSMTF3 VSMTF7 VTMTF0 VTMTF3 VTMTF7 0.468 0.450 0.344 0.468 0.426 0.310 ISFS0 ISFS3 ISFS7 ITFS0 ITFS3 ITFS7 0.005 mm 0.040 mm 0.010 mm 0.005 mm 0.040 mm 0.005 mm ISMTF0 ISMTF3 ISMTF7 ITMTF0 ITMTF3 ITMTF7 0.279 0.239 0.161 0.279 0.216 0.184 FS AIFS AVFS AFS 0.000 mm 0.014 mm 0.007 mm 0.008 mm
(201) The figures related to the profile curve lengths obtained based on Table 9 and Table 10 are listed in the following table:
(202) TABLE-US-00022 Fifth embodiment (Reference wavelength: 555 nm) ARE 1/2(HEP) ARE value ARE-1/2(HEP) 2(ARE/REP) % TP ARE/TP (%) 11 0.796 0.796 0.00013 99.98% 5.325 14.95% 12 0.796 0.796 0.00007 100.01% 5.325 14.95% 21 0.796 0.796 0.00010 99.99% 9.362 8.50% 22 0.796 0.797 0.00099 100.12% 9.362 8.51% 31 0.796 0.796 0.00013 99.98% 9.496 8.38% 32 0.796 0.796 0.00004 100.00% 9.496 8.38% 41 0.796 0.797 0.00072 100.09% 2.521 31.61% 42 0.796 0.797 0.00066 100.08% 2.521 31.61% 51 0.796 0.796 0.00003 100.00% 0.654 121.65% 52 0.796 0.799 0.00255 100.32% 0.654 122.04% 61 0.796 0.799 0.00244 100.31% 4.264 18.73% 62 0.796 0.797 0.00110 100.14% 4.264 18.70% 71 0.796 0.797 0.00112 100.14% 0.546 146.11% 72 0.796 0.796 0.00008 100.01% 0.546 145.92% ARS EHD ARS value ARS-EHD (ARS/EHD) % TP ARS/TP (%) 11 39.000 42.095 3.095 107.94% 5.325 790.50% 12 19.703 26.600 6.896 135.00% 5.325 499.51% 21 19.125 19.211 0.086 100.45% 9.362 205.20% 22 8.071 10.594 2.522 131.25% 9.362 113.16% 31 7.292 7.296 0.004 100.05% 9.496 76.83% 32 7.209 7.325 0.116 101.61% 9.496 77.14% 41 4.173 4.249 0.076 101.82% 2.521 168.58% 42 4.110 4.182 0.072 101.75% 2.521 165.93% 51 3.926 3.946 0.020 100.52% 0.654 603.01% 52 4.030 4.151 0.121 103.01% 0.654 634.32% 61 4.247 4.433 0.186 104.39% 4.264 103.97% 62 4.490 4.781 0.291 106.49% 4.264 112.13% 71 4.377 4.552 0.174 103.99% 0.546 834.17% 72 4.362 4.378 0.016 100.37% 0.546 802.39%
(203) The results of the equations of the fifth embodiment based on Table 9 and Table 10 are listed in the following table:
(204) TABLE-US-00023 Values related to the inflection points of the fifth embodiment (Reference wavelength: 555 nm) HIF211 9.7821 HIF211/HOI 1.6303 SGI211 0.8271 |SGI211|/(|SGI211| + TP2) 0.0812 HIF311 2.4717 HIF311/HOI 0.4120 SGI211 0.0220 |SGI311|/(|SGI311| + TP3) 0.0023 HIF411 3.4647 HIF411/HOI 0.5775 SGI411 0.5456 |SGI411|/(|SGI411| + TP4) 0.1779 HIF511 3.8496 HIF511/HOI 0.6416 SGI511 0.3238 |SGI511|/(|SGI511| + TP5) 0.3310 HIF521 2.9810 HIF521/HOI 0.4968 SGI521 0.6136 |SGI521|/(|SGI521| + TP5) 0.4839 HIF522 3.8137 HIF522/HOI 0.6356 SGI522 0.8671 |SGI522|/(|SGI522| + TP5) 0.5699 HIF611 3.5954 HIF611/HOI 0.5992 SGI611 0.9142 |SGI611|/(|SGI611| + TP6) 0.1766 HIF711 3.4465 HIF711/HOI 0.5744 SGI711 0.7719 |SGI711|/(|SGI711| + TP7) 0.5859 HIF721 2.5598 HIF721/HOI 0.4266 SGI721 0.1451 |SGI721|/(|SGI721| + TP7) 0.2100
Sixth Embodiment
(205) As shown in
(206) The first lens 610 has negative refractive power and is made of glass. An object-side surface 612, which faces the object side, is a convex aspheric surface, and an image-side surface 614, which faces the image side, is a concave aspheric surface.
(207) The second lens 620 has negative refractive power and is made of glass. An object-side surface 622 thereof, which faces the object side, is a convex aspheric surface, and an image-side surface 624 thereof, which faces the image side, is a concave aspheric surface. The object-side surface 622 has an inflection point.
(208) The third lens 630 has positive refractive power and is made of plastic. An object-side surface 632, which faces the object side, is a concave aspheric surface, and an image-side surface 634, which faces the image side, is a convex aspheric surface.
(209) The fourth lens 640 has positive refractive power and is made of plastic. An object-side surface 642, which faces the object side, is a convex spherical surface, and an image-side surface 644, which faces the image side, is a convex spherical surface.
(210) The fifth lens 650 has negative refractive power and is made of plastic. An object-side surface 652, which faces the object side, is a concave aspheric surface, and an image-side surface 654, which faces the image side, is a concave aspheric surface.
(211) The sixth lens 660 has positive refractive power and is made of plastic. An object-side surface 662, which faces the object side, is a convex aspheric surface, and an image-side surface 664, which faces the image side, is a convex aspheric surface. Whereby, the incident angle of each view field could be adjusted to improve aberration.
(212) The seventh lens 670 has negative refractive power and is made of plastic. An object-side surface 672, which faces the object side, is a concave surface, and an image-side surface 674, which faces the image side, is a concave surface. The image-side surface 674 has an inflection point. It may help to shorten the back focal length to keep small in size. In addition, it may reduce an incident angle of the light of an off-axis field of view and correct the aberration of the off-axis field of view.
(213) The infrared rays filter 680 is made of glass and between the seventh lens 670 and the image plane 690. The infrared rays filter 680 gives no contribution to the focal length of the system.
(214) The parameters of the lenses of the sixth embodiment are listed in Table 11 and Table 12.
(215) TABLE-US-00024 TABLE 11 f = 3.0145 mm; f/HEP = 1.6; HAF = 100 deg Focal Radius of curvature Thickness Refractive Abbe length Surface (mm) (mm) Material index number (mm) 0 Object 1E+18 1E+18 1 1.sup.st lens 70.11502755 4.224 glass 1.564 60.83 51.850 2 20.13480972 16.630 3 2.sup.nd lens 75.9703764 2.742 glass 1.702 41.15 15.768 4 9.591795449 11.025 5 3.sup.rd lens 21.3115197 13.828 plastic 1.661 20.40 34.535 6 13.99907941 10.753 7 Aperture 1E+18 0.206 8 4.sup.th lens 9.607535629 2.249 plastic 1.544 55.96 10.385 9 12.46482446 0.518 10 5.sup.th lens 30.50238209 0.698 plastic 1.661 20.40 9.753 11 8.27386019 0.490 12 6.sup.th lens 6.772530749 7.210 plastic 1.544 55.96 8.645 13 9.676681523 0.464 14 7.sup.th lens 21.62446642 3.995 plastic 1.661 20.40 14.604 15 18.94872291 0.452 16 Infrared 1E+18 1.000 BK_7 1.517 64.2 rays filter 17 1E+18 1.005 18 Image 1E+18 0.005 plane Reference wavelength: 555 nm; the position of blocking light: none.
(216) TABLE-US-00025 TABLE 12 Coefficients of the aspheric surfaces Surface 1 2 3 4 5 6 8 k 9.997289E01 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 6.991219E01 3.446971E01 A4 6.151231E08 9.316681E06 2.072640E05 6.537710E05 8.508985E05 4.079449E05 7.114546E05 A6 1.509269E10 1.285632E08 2.441236E08 2.764024E08 4.984317E07 1.308318E07 1.632271E07 A8 2.456007E14 2.461372E21 1.019337E11 2.996234E09 5.507962E10 2.189337E10 1.308598E07 A10 2.892898E17 1.148852E24 3.131755E15 4.655406E20 1.520489E11 1.637919E12 7.430792E09 A12 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 Surface 9 10 11 12 13 14 15 k 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 A4 8.755948E04 7.020672E04 3.753123E04 7.531434E04 3.489045E04 9.921789E04 6.618163E04 A6 1.306932E05 1.708084E05 8.164472E06 4.058472E06 7.057471E06 6.674084E06 3.322863E06 A8 1.406677E07 2.959662E07 1.215639E07 1.775085E07 2.083656E08 1.296766E07 7.076644E08 A10 1.457487E09 1.332265E08 1.835685E09 1.020327E08 3.556652E09 2.741156E09 4.695574E09 A12 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00
(217) An equation of the aspheric surfaces of the sixth embodiment is the same as that of the first embodiment, and the definitions are the same as well.
(218) The exact parameters of the sixth embodiment based on Table 11 and Table 12 are listed in the following table:
(219) TABLE-US-00026 Sixth embodiment (Reference wavelength: 555 nm) |f/f1| |f/f2| |f/f3| |f/f4| |f/f5| |f/f6| 0.0581 0.1912 0.0873 0.2903 0.3091 0.3487 |f/f7| PPR NPR PPR/|NPR| IN12/f IN67/f 0.2064 1.0935 0.3976 2.7503 5.4894 0.1505 |f1/f2| |f2/f3| (TP1 + IN12)/TP2 (TP7 + IN67)/TP6 3.2883 0.4566 7.5952 0.6108 HOS InTL HOS/HOI InS/HOS ODT % TDT % 77.3995 74.9614 12.8999 0.2382 127.8020 82.6333 HVT11 HVT12 HVT21 HVT22 HVT31 HVT32 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 HVT61 HVT62 HVT71 HVT72 HVT72/HOI HVT72/HOS 0.0000 0.0000 0.0000 4.2008 0.7001 0.0543 PSTA PLTA NSTA NLTA SSTA SLTA 0.013 mm 0.012 mm 0.007 mm 0.018 mm 0.001 mm 0.007 mm VSFS0 VSFS3 VSFS7 VTFS0 VTFS3 VTFS7 0.000 mm 0.005 mm 0.010 mm 0.000 mm 0.005 mm 0.000 mm VSMTF0 VSMTF3 VSMTF7 VTMTF0 VTMTF3 VTMTF7 0.628 0.631 0.560 0.628 0.503 0.264 ISFS0 ISFS3 ISFS7 ITFS0 ITFS3 ITFS7 0.005 mm 0.000 mm 0.010 mm 0.005 mm 0.005 mm 0.005 mm ISMTF0 ISMTF3 ISMTF7 ITMTF0 ITMTF3 ITMTF7 0.747 0.563 0.377 0.747 0.453 0.252 FS AIFS AVFS AFS 0.005 mm 0.000 mm 0.002 mm 0.002 mm
(220) The figures related to the profile curve lengths obtained based on Table 11 and Table 12 are listed in the following table:
(221) TABLE-US-00027 Sixth embodiment (Reference wavelength: 555 nm) ARE 1/2(HEP) ARE value ARE-1/2(HEP) 2(ARE/HEP) % TP ARE/TP (%) 11 0.937 0.937 0.00039 99.96% 4.224 22.18% 12 0.937 0.937 0.00008 99.99% 4.224 22.19% 21 0.937 0.937 0.00040 99.96% 2.742 34.17% 22 0.937 0.938 0.00107 100.11% 2.742 34.22% 31 0.937 0.937 0.00012 99.99% 13.828 6.78% 32 0.937 0.938 0.00028 100.03% 13.828 6.78% 41 0.937 0.938 0.00107 100.11% 2.249 41.73% 42 0.937 0.938 0.00042 100.05% 2.249 41.70% 51 0.937 0.937 0.00029 99.97% 0.698 134.32% 52 0.937 0.939 0.00157 100.17% 0.698 134.59% 61 0.937 0.940 0.00253 100.27% 7.210 13.04% 62 0.937 0.938 0.00103 100.11% 7.210 13.02% 71 0.937 0.937 0.00010 99.99% 3.995 23.46% 72 0.937 0.937 0.00006 99.99% 3.995 23.46% ARS EHD ARS value ARS-EHD (ARS/EHD) % TP ARS/TP (%) 11 47.641 55.094 7.453 115.64% 4.224 1304.32% 12 20.018 31.378 11.360 156.75% 4.224 742.85% 21 18.970 19.500 0.530 102.79% 2.742 711.12% 22 9.537 13.803 4.266 144.73% 2.742 503.35% 31 9.504 10.026 0.522 105.49% 13.828 72.50% 32 10.530 11.384 0.855 108.12% 13.828 82.33% 41 4.437 4.611 0.174 103.93% 2.249 205.02% 42 4.489 4.539 0.049 101.10% 2.249 201.80% 51 4.503 4.507 0.004 100.09% 0.698 645.95% 52 4.578 4.759 0.181 103.96% 0.698 682.08% 61 4.993 5.317 0.324 106.49% 7.210 73.75% 62 5.130 5.283 0.152 102.97% 7.210 73.27% 71 5.055 5.242 0.188 103.71% 3.995 131.22% 72 5.818 5.831 0.013 100.22% 3.995 145.96%
(222) The results of the equations of the sixth embodiment based on Table 11 and Table 12 are listed in the following table:
(223) TABLE-US-00028 Values related to the inflection points of the sixth embodiment (Reference wavelength: 555 nm) HIF211 17.4438 HIF211/HOI 2.9073 SGI211 3.2816 |SGI211|/(|SGI211| + TP2) 0.5481 HIF721 2.4565 HIF721/HOI 0.4094 SGI721 0.1273 |SGI721|/(|SGI721| + TP7) 0.0314
(224) It must be pointed out that the embodiments described above are only some embodiments of the present invention. All equivalent structures which employ the concepts disclosed in this specification and the appended claims should fall within the scope of the present invention.