Optical image capturing system
11500180 · 2022-11-15
Assignee
Inventors
Cpc classification
G02B5/208
PHYSICS
International classification
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 has negative refractive force, wherein both surfaces thereof can be aspheric, and at least one surface thereof 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 positive refractive power; an aperture; a second lens having negative refractive power; a third lens having refractive power; a fourth lens having refractive power; a fifth lens having refractive power; a sixth lens having positive refractive power; a seventh lens having negative refractive power; and an image plane; wherein the optical image capturing system has a total of the seven lenses with refractive power; at least one lens among the first to the seventh lenses is made of glass; at least four lens among the first to the seventh lenses has positive refractive power; each lens of the first to the seventh lenses has an object-side surface, which faces the object side, and an image-side surface, which faces the image side; the object-side surface of the first lens is a convex surface; the image-side surface of the second lens is a concave surface; the image-side surface of the fourth lens is a convex surface; the image-side surface of the sixth lens is a convex surface; wherein the optical image capturing system satisfies:
1≤f/HEP≤10;
0.5≤HOS/HOI≤1.9;
0 deg<HAF≤100 deg; and
0.5≤SETP/STP<1; wherein 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 field angle of the optical image capturing system; ETP1, ETP2, ETP3, ETP4, ETP5, ETP6, and ETP7 are respectively a thickness of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, and the seventh lens at a height of half of the entrance pupil diameter away from the optical axis, wherein the height of half of the entrance pupil diameter is smaller than or equal to a minimum of a maximum effective half diameter of any surface among the first to the seventh lens; SETP is a sum of the aforementioned ETP1 to ETP7; TP1, TP2, TP3, TP4, TP5, TP6, and TP7 are respectively a thickness of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, and the seventh lens on the optical axis; STP is a sum of the aforementioned TP1 to TP7; HOS is a distance between the object-side surface of the first lens and the image plane on the optical axis; HOI is a maximum height for image formation perpendicular to the optical axis on the image plane.
2. The optical image capturing system of claim 1, wherein the optical image capturing system further satisfies:
0.2≤InS/HOS≤1.1; wherein InS is a distance on the optical axis between the aperture and the image plane; HOS is a distance between the object-side surface of the first lens and the image plane on the optical axis.
3. The optical image capturing system of claim 1, wherein at least one surface of each of at least two lenses among the first lens to the seventh lens has at least an inflection point thereon.
4. The optical image capturing system of claim 1, wherein the optical image capturing system further satisfies:
0.2≤EIN/ETL<1; wherein ETL is a distance in parallel with the optical axis between a coordinate point at a height of half of the entrance pupil diameter away from the optical axis on the object-side surface of the first lens and the image plane; EIN is a distance in parallel with the optical axis between the coordinate point at the height of half of the entrance pupil diameter away from the optical axis on the object-side surface of the first lens and a coordinate point at a height of half of the entrance pupil diameter away from the optical axis on the image-side surface of the seventh lens.
5. The optical image capturing system of claim 1, wherein the optical image capturing system further satisfies:
0.2≤SETP/EIN<1; wherein EIN is a distance in parallel with the optical axis between the coordinate point at the height of half of the entrance pupil diameter away from the optical axis on the object-side surface of the first lens and a coordinate point at a height of half of the entrance pupil diameter away from the optical axis on the image-side surface of the seventh lens.
6. The optical image capturing system of claim 1, further comprising a filtering component provided between the seventh lens and the image plane, wherein the optical image capturing system further satisfies:
0.1≤EIR/PIR≤1.1; wherein EIR is a horizontal distance in parallel with the optical axis between the coordinate point at a height of half of the entrance pupil diameter away from the optical axis on the image-side surface of the seventh lens and the filtering component; PIR is a horizontal distance in parallel with the optical axis between a point on the image-side surface of the seventh lens where the optical axis passes through and the filtering component.
7. The optical image capturing system of claim 1, wherein the optical image capturing system further satisfies:
MTFE0≥0.2;
MTFE3≥0.01; and
MTFE7≥0.01; wherein HOI is a maximum height for image formation perpendicular to the optical axis on the image plane; MTFE0, MTFE3, and MTFE7 are respectively a value of modulation transfer function of visible light in a spatial frequency of 55 cycles/mm at the optical axis, 0.3 HOI, and 0.7 HOI on an image plane for visible light.
8. The optical image capturing system of claim 1, wherein the optical image capturing system further satisfies:
0.1≤EBL/BL≤1.5; wherein EBL is a horizontal distance in parallel with the optical axis between a coordinate point at a height of half of the entrance pupil diameter away from the optical axis on the image-side surface of the seventh lens and image surface; BL is a horizontal distance in parallel with the optical axis between the point on the image-side surface of the seventh lens where the optical axis passes through and the image plane.
9. An optical image capturing system, in order along an optical axis from an object side to an image side, comprising: a first lens having positive refractive power; an aperture; a second lens having negative refractive power; a third lens having refractive power; a fourth lens having refractive power; a fifth lens having refractive power; a sixth lens having positive refractive power; a seventh lens having negative refractive power; and an image plane; wherein the optical image capturing system has a total of seven lens with refractive power; at least one lens among the first lens to the seventh lens is made of glass; at least one surface of at least two lenses among the first lens to the seventh lens has at least an inflection point; at least two lens among the four lens to the seventh lens has positive refractive power; each lens among the first to the seventh lenses has an object-side surface, which faces the object side, and an image-side surface, which faces the image side; the object-side surface of the first lens is a convex surface; the image-side surface of the second lens is a concave surface; the image-side surface of the fourth lens is a convex surface; the image-side surface of the sixth lens is a convex surface; wherein the optical image capturing system satisfies:
1≤f/HEP≤10;
0 deg<HAF≤60 deg;
0.5≤HOS/HOI≤1.8; and
0.2≤EIN/ETL<1; wherein 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 the object-side surface of the first lens and the image plane on the optical axis; HOI is a maximum height for image formation perpendicular to the optical axis on the image plane; HAF is a half of the maximum field angle of the optical image capturing system; ETL is a distance in parallel with the optical axis between a coordinate point at a height of half of the entrance pupil diameter away from the optical axis on the object-side surface of the first lens and the image plane, wherein the height of half of the entrance pupil diameter is smaller than or equal to a minimum of a maximum effective half diameter of any surface among the first to the seventh lens; EIN is a distance in parallel with the optical axis between the coordinate point at the height of half of the entrance pupil diameter away from the optical axis on the object-side surface of the first lens and a coordinate point at a height of half of the entrance pupil diameter away from the optical axis on the image-side surface of the seventh lens; wherein at least one surface of at least one lens among the first lens to the third lens has at least a critical point.
10. The optical image capturing system of claim 9, wherein the object-side surface of the first lens is convex on the optical axis, and the image-side surface of the second lens is convex on the optical axis.
11. The optical image capturing system of claim 9, wherein the optical image capturing system further satisfies:
0<ED67/IN67≤50; wherein ED67 is a horizontal distance between the sixth lens and the seventh lens at a height of half of the entrance pupil diameter away from the optical axis; IN67 is a horizontal distance between the sixth lens and the seventh lens on the optical axis.
12. The optical image capturing system of claim 9, wherein the optical image capturing system further satisfies:
0<ED12/IN12≤10; wherein ED12 is a horizontal distance between the first lens and the second lens at a height of half of the entrance pupil diameter away from the optical axis; IN12 is a horizontal distance between the first lens and the second lens on the optical axis.
13. The optical image capturing system of claim 9, wherein the optical image capturing system further satisfies:
0<ETP2/TP2≤3; wherein ETP2 is a thickness of the second lens at a height of half of the entrance pupil diameter away from the optical axis in parallel with the optical axis; TP2 is a thickness of the second lens on the optical axis.
14. The optical image capturing system of claim 9, wherein the optical image capturing system further satisfies:
0<ETP6/TP6≤5; wherein ETP6 is a thickness of the sixth lens at a height of half of the entrance pupil diameter away from the optical axis in parallel with the optical axis; TP6 is a thickness of the sixth lens on the optical axis.
15. The optical image capturing system of claim 9, wherein the optical image capturing system further satisfies:
0<ETP7/TP7≤5; wherein ETP7 is a thickness of the seventh lens at a height of half of the entrance pupil diameter away from the optical axis in parallel with the optical axis; TP7 is a thickness of the seventh lens on the optical axis.
16. The optical image capturing system of claim 9, wherein the optical image capturing system further satisfies:
MTFQ0≥0.2;
MTFQ3≥0.01; and
MTFQ7≥0.01 wherein MTFQ0, MTFQ3, and MTFQ7 are respectively values of modulation transfer function of visible light in a spatial frequency of 110 cycles/mm at the optical axis, 0.3 HOI, and 0.7 HOI on the image plane for visible light.
17. The optical image capturing system of claim 9, 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.
18. An optical image capturing system, in order along an optical axis from an object side to an image side, comprising: a first lens having positive refractive power, wherein the first lens is made of glass; an aperture; a second lens having negative refractive power; a third lens having refractive power; a fourth lens having refractive power; a fifth lens having refractive power; a sixth lens having positive refractive power; a seventh lens having negative refractive power; and an image plane; wherein the optical image capturing system has a total of the seven lenses having refractive power; at least two lens among the fourth lens to the seventh lens has positive refractive power; at least one surface of each of at least two lenses among the first lens to the seventh lens has at least an inflection point; each lens of the first to the seventh lenses has an object-side surface, which faces the object side, and an image-side surface, which faces the image side; the object-side surface of the first lens is a convex surface; the image-side surface of the second lens is a concave surface; the image-side surface of the fourth lens is a convex surface; the image-side surface of the sixth lens is a convex surface; wherein the optical image capturing system satisfies:
1≤f/HEP≤10;
0 deg<HAF≤100 deg;
0.5≤HOS/HOI≤1.6;
0.9≤InS/HOS≤1.1; and
0.2≤EIN/ETL<1; wherein f is a focal length of the optical image capturing system; InS is a distance on the optical axis between the aperture and 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 image plane on the optical axis; HAF is a half of a maximum view angle of the optical image capturing system; HOI is a maximum height for image formation perpendicular to the optical axis on the image plane; ETL is a distance in parallel with the optical axis between a coordinate point at a height of half of the entrance pupil diameter away from the optical axis on the object-side surface of the first lens and the image plane, wherein the height of half of the entrance pupil diameter is smaller than or equal to a minimum of a maximum effective half diameter of any surface among the first to the seventh lens; EIN is a distance in parallel with the optical axis between the coordinate point at the height of half of the entrance pupil diameter away from the optical axis on the object-side surface of the first lens and a coordinate point at a height of half of the entrance pupil diameter away from the optical axis on the image-side surface of the seventh lens.
19. The optical image capturing system of claim 18, wherein at least one surface of at least one lens among the first lens to the third lens has at least a critical point; the object-side surface of the first lens is convex on the optical axis, and the object-side surface of the second lens is convex on the optical axis.
20. The optical image capturing system of claim 18, wherein the optical image capturing system further satisfies:
HOI≥5 mm.
21. The optical image capturing system of claim 18, wherein the optical image capturing system further satisfies:
0.1≤EBL/BL<1.5; wherein EBL is a horizontal distance in parallel with the optical axis between a coordinate point at the height of half of the entrance pupil diameter away from the optical axis on the image-side surface of the seventh lens and image surface; BL is a horizontal distance in parallel with the optical axis between the point on the image-side surface of the seventh lens where the optical axis passes through and the image plane.
22. The optical image capturing system of claim 18, wherein the optical image capturing system further satisfies:
0<ED67/IN67≤50; wherein ED67 is a horizontal distance between the sixth lens and the seventh lens at a height of half of the entrance pupil diameter away from the optical axis; IN67 is a horizontal distance between the sixth lens and the seventh lens on the optical axis.
23. The optical image capturing system of claim 18, further comprising an image sensor and a driving module, wherein the image sensor is disposed on the image plane; the driving module is coupled with the lenses to move the lenses.
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
(20) 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. Image heights in the following embodiments are all almost 3.91 mm.
(21) 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.
(22) The optical image capturing system of the present invention satisfies 0.5≤ΣPPR/|ΣNPR|≤15, and a preferable range is 1≤ΣPPR/|/ΣNPR|≤3.0, where PPR is a ratio of the focal length f 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 f of the optical image capturing system to a focal length fn of each of lenses with negative refractive power; ΣPPR is a sum of the PPRs of each positive lens; and ΣNPR 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.
(23) The image sensor is provided on the image plane. The optical image capturing system of the present invention satisfies HOS/HOI≤10 and 0.5≤HOS/f≤10, and a preferable range is 1≤HOS/HOI≤5 and 1≤HOS/f≤7, 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.
(24) The optical image capturing system of the present invention further is provided with an aperture to increase image quality.
(25) 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 0.2≤InS/HOS≤1.1, 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.
(26) The optical image capturing system of the present invention satisfies 0.1≤ΣTP/InTL≤0.9, where InTL is a distance between the object-side surface of the first lens and the image-side surface of the seventh lens, and ΣTP 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.
(27) 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.
(28) The optical image capturing system of the present invention satisfies −7<(R13−R14)/(R13+R14)<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.
(29) The optical image capturing system of the present invention satisfies IN12/f≤3.0, 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.
(30) The optical image capturing system of the present invention satisfies IN67/f≤0.8, 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.
(31) The optical image capturing system of the present invention satisfies 0.1≤(TP1+IN12)/TP2≤10, 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.
(32) The optical image capturing system of the present invention satisfies 0.1≤(TP7+IN67)/TP6≤10, 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.
(33) The optical image capturing system of the present invention satisfies 0.1≤TP4/(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.
(34) The optical image capturing system satisfies 0 mm≤HVT71≤3 mm; 0 mm<HVT72≤6 mm; 0≤HVT71/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.
(35) The optical image capturing system satisfies 0.2≤HVT72/HOI≤0.9, and preferably satisfies 0.3≤HVT72/HOI≤0.8. It may help to correct the peripheral aberration.
(36) The optical image capturing system satisfies 0≤HVT72/HOS≤0.5, and preferably satisfies 0.2≤HVT72/HOS≤0.45. It may help to correct the peripheral aberration.
(37) 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 0.1≤SGI711/(SGI711+TP7)≤0.6; 0.1≤SGI721/(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.
(38) 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 0.1≤SGI712/(SGI712+TP7)≤0.6; 0.1≤SGI722/(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 object-side surface, which is the second closest to the optical axis, projects on the optical axis.
(39) 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.
(40) 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.
(41) 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.
(42) 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.
(43) 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.
(44) 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+A16h.sup.16+A18h.sup.18+A20h.sup.20+ . . . (1)
(45) 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.
(46) 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.
(47) 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.
(48) 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.
(49) 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.
(50) 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.
(51) 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.
(52) We provide several embodiments in conjunction with the accompanying drawings for the best understanding, which are:
First Embodiment
(53) As shown in
(54) 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, and the image-side surface 114 has two inflection points. A thickness of the first lens 110 on the optical axis is TP1, and a thickness of the first lens 110 at the height of a half of the entrance pupil diameter (HEP) is denoted by ETP1.
(55) The first lens satisfies SGI111=−0.1110 mm; SGI121=2.7120 mm; TP1=2.2761 mm; |SGI111|/(|SGI111|+TP1)=0.0465; |SGI121|/(|SGI121|+TP1)=0.5437, where 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 image-side surface, which is the closest to the optical axis, projects on the optical axis, is denoted by SGI111, and 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 is denoted by SGI121.
(56) The first lens satisfies SGI112=0 mm; SGI122=4.2315 mm; |SGI112|/(|SGI112|+TP1)=0; |SGI122|/(|SGI122|+TP1)=0.6502, where 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 image-side surface, which is the second closest to the optical axis, projects on the optical axis, is denoted by SGI112, and 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 is denoted by SGI122.
(57) The first lens satisfies HIF111=12.8432 mm; HIF111/HOI=1.7127; HIF121=7.1744 mm; HIF121/HOI=0.9567, where 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 is denoted by HIF111, and 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 is denoted by HIF121.
(58) The first lens satisfies HIF112=0 mm; HIF112/HOI=0; HIF122=9.8592 mm; HIF122/HOI=1.3147, where 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 is denoted by HIF112, and 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 is denoted by HIF122.
(59) 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 thickness of the second lens 120 on the optical axis is TP2, and thickness of the second lens 120 at the height of a half of the entrance pupil diameter (HEP) is denoted by ETP2.
(60) 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.
(61) 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.
(62) 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 thickness of the third lens 130 on the optical axis is TP3, and a thickness of the third lens 130 at the height of a half of the entrance pupil diameter (HEP) is denoted by ETP3.
(63) 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.
(64) 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.
(65) 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.
(66) 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.
(67) 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 thickness of the fourth lens 140 on the optical axis is TP4, and a thickness of the fourth lens 140 at the height of a half of the entrance pupil diameter (HEP) is denoted by ETP4.
(68) 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.
(69) 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.
(70) 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.
(71) 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.
(72) 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 thickness of the fifth lens 150 on the optical axis is TP5, and a thickness of the fifth lens 150 at the height of a half of the entrance pupil diameter (HEP) is denoted by ETP5.
(73) 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.
(74) 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.
(75) 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.
(76) 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.
(77) 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 aspheric surface, and an image-side surface 164, which faces the image side, is a concave aspheric surface. The object-side surface 162 and the image-side surface 164 both have an inflection point. Whereby, the incident angle of each view field entering the sixth lens 160 can be effectively adjusted to improve aberration. A thickness of the sixth lens 160 on the optical axis is TP6, and a thickness of the sixth lens 160 at the height of a half of the entrance pupil diameter (HEP) is denoted by ETP6.
(78) The sixth lens 160 satisfies SGI611=0.3208 mm; SGI621=0.5937 mm; |SGI611|/(|SGI611|+TP6)=0.5167; |SGI621|/(|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.
(79) 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.
(80) 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. The object-side surface 172 and the image-side surface 174 both have an inflection point. A thickness of the seventh lens 170 on the optical axis is TP7, and a thickness of the seventh lens 170 at the height of a half of the entrance pupil diameter (HEP) is denoted by ETP7.
(81) The seventh lens 170 satisfies SGI711=0.5212 mm; SGI721=0.5668 mm; |SGI711|/(|SGI711|+TP7)=0.3179; |SGI721|/(|SGI721|+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.
(82) 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.
(83) A distance in parallel with the optical axis between a coordinate point at a height of ½ HEP on the object-side surface of the first lens 110 and the image plane is ETL, and a distance in parallel with the optical axis between the coordinate point at the height of ½ HEP on the object-side surface of the first lens 110 and a coordinate point at a height of ½ HEP on the image-side surface of the seventh lens 140 is EIN, which satisfies: ETL=26.980 mm; EIN=24.999 mm; EIN/ETL=0.927.
(84) The optical image capturing system of the first embodiment satisfies: ETP1=2.470 mm; ETP2=5.144 mm; ETP3=0.898 mm; ETP4=1.706 mm; ETP5=3.901 mm; ETP6=0.528 mm; ETP7=1.077 mm. The sum of the aforementioned ETP1 to ETP7 is SETP, wherein SETP=15.723 mm. In addition, TP1=2.276 mm; TP2=5.240 mm; TP3=0.837 mm; TP4=2.002 mm; TP5=4.271 mm; TP6=0.300 mm; TP7=1.118 mm. The sum of the aforementioned TP1 to TP7 is STP, wherein STP=16.044 mm. In addition, SETP/STP=0.980, and SETP/EIN=0.629.
(85) In order to enhance the ability of correcting aberration and to lower the difficulty of manufacturing at the same time, the ratio between the thickness (ETP) at the height of a half of the entrance pupil diameter (HEP) and the thickness (TP) of any lens on the optical axis (i.e., ETP/TP) in the optical image capturing system of the first embodiment is particularly controlled, which satisfies: ETP1/TP1=1.085; ETP2/TP2=0.982; ETP3/TP3=1.073; ETP4/TP4=0.852; ETP5/TP5=0.914; ETP6/TP6=1.759; ETP7/TP7=0.963.
(86) In order to enhance the ability of correcting aberration, lower the difficulty of manufacturing, and “slightly shortening” the length of the optical image capturing system at the same time, the ratio between the horizontal distance (ED) between two neighboring lenses at the height of a half of the entrance pupil diameter (HEP) and the parallel distance (IN) between these two neighboring lens on the optical axis (i.e., ED/IN) in the optical image capturing system of the first embodiment is particularly controlled, which satisfies: the horizontal distance between the first lens 110 and the second lens 120 at the height of a half of the entrance pupil diameter (HEP) is denoted by ED12, wherein ED12=4.474 mm; the horizontal distance between the second lens 120 and the third lens 130 at the height of a half of the entrance pupil diameter (HEP) is denoted by ED23, wherein ED23=0.349 mm; the horizontal distance between the third lens 130 and the fourth lens 140 at the height of a half of the entrance pupil diameter (HEP) is denoted by ED34, wherein ED34=1.660 mm; the horizontal distance between the fourth lens 140 and the fifth lens 150 at the height of a half of the entrance pupil diameter (HEP) is denoted by ED45, wherein ED45=1.794 mm; the horizontal distance between the fifth lens 150 and the sixth lens 160 at the height of a half of the entrance pupil diameter (HEP) is denoted by ED56, wherein ED56=0.714 mm; the horizontal distance between the sixth lens 160 and the seventh lens 170 at the height of a half of the entrance pupil diameter (HEP) is denoted by ED67, wherein ED67=0.284 mm. The sum of the aforementioned ED12 to ED67 is SED, wherein SED=9.276 mm.
(87) The horizontal distance between the first lens 110 and the second lens 120 on the optical axis is denoted by IN12, wherein IN12=4.552 mm, and ED12/IN12=0.983. The horizontal distance between the second lens 120 and the third lens 130 on the optical axis is denoted by IN23, wherein IN23=0.162 mm, and ED23/IN23=2.153. The horizontal distance between the third lens 130 and the fourth lens 140 on the optical axis is denoted by IN34, wherein IN34=1.927 mm, and ED34/IN34=0.862. The horizontal distance between the fourth lens 140 and the fifth lens 150 on the optical axis is denoted by IN45, wherein IN45=1.515 mm, and ED45/IN45=1.184. The horizontal distance between the fifth lens 150 and the sixth lens 160 on the optical axis is denoted by IN56, wherein IN56=0.050 mm, and ED56/IN56=14.285. The horizontal distance between the sixth lens 160 and the seventh lens 170 on the optical axis is denoted by IN67, wherein IN67=0.211 mm, and ED67/IN67=1.345. The sum of the aforementioned IN12 to IN67 is denoted by SIN, wherein SIN=8.418, and SED/SIN=1.102.
(88) The optical image capturing system of the first embodiment satisfies: ED12/ED23=12.816; ED23/ED34=0.210; ED34/ED45=0.925; ED45/ED56=2.512; ED56/ED67=2.512; IN12/IN23=28.080; IN23/IN34=0.084; IN34/IN45=1.272; IN45/IN56=30.305; IN56/IN67=0.236.
(89) The horizontal distance in parallel with the optical axis between a coordinate point at the height of ½ HEP on the image-side surface of the seventh lens 170 and image surface is denoted by EBL, wherein EBL=1.982 mm. The horizontal distance in parallel with the optical axis between the point on the image-side surface of the seventh lens 170 where the optical axis passes through and the image plane is denoted by BL, wherein BL=2.517 mm. The optical image capturing system of the first embodiment satisfies: EBL/BL=0.7874. The horizontal distance in parallel with the optical axis between the coordinate point at the height of ½ HEP on the image-side surface of the seventh lens 170 and the infrared rays filter 180 is denoted by EIR, wherein EIR=0.865 mm. The horizontal distance in parallel with the optical axis between the point on the image-side surface of the seventh lens 170 where the optical axis passes through and the infrared rays filter 180 is denoted by PIR, wherein PIR=1.400 mm, and it satisfies: EIR/PIR=0.618.
(90) The description below and the features related to inflection points are obtained based on main reference wavelength of 555 nm.
(91) 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.
(92) 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 degrees; and tan(HAF)=1.7318, where f is a focal length of the system; HAF is a half of the maximum field angle; and HEP is an entrance pupil diameter.
(93) 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.
(94) 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, f6 is a focal length of the sixth lens 160, and f7 is a focal length of the seventh lens 170.
(95) The optical image capturing system 10 of the first embodiment further satisfies ΣPPR=f/f2+f/f4+f/f5+f/f7=1.7384; ΣNPR=f/f1+f/f3+f/f6=−0.9999; ΣPPR/|ΣNPR|=1.7386; |f/f2|=0.1774; |f/f3|=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 f 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 f of the optical image capturing system to a focal length fn of each of lenses with negative refractive power.
(96) 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.
(97) The optical image capturing system 10 of the first embodiment further satisfies ΣTP=16.0446 mm; and ΣTP/InTL=0.6559, where ΣTP 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.
(98) 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.
(99) The optical image capturing system 10 of the first embodiment further satisfies (R13−R14)/(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.
(100) The optical image capturing system 10 of the first embodiment further satisfies ΣPP=f2+f4+f5+f7=49.4535 mm; and f4/(f2+f4+f5+f7)=0.1972, where ΣPP is a sum of the focal lengths 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.
(101) The optical image capturing system 10 of the first embodiment further satisfies ΣNP=f1+f3+f6=−118.1178 mm; and f1/(f1+f3+f6)=0.1677, where/NP is a sum of the focal lengths fn of each lens with negative refractive power. It is helpful to share the negative refractive power of the first lens 110 to the other negative lens, which avoid the significant aberration caused by the incident rays.
(102) 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.
(103) 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.
(104) 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.
(105) 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; 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. It may control the sensitivity of manufacture of the system and lower the total height of the system.
(106) The optical image capturing system 10 of the first embodiment further satisfies InRS61=−0.7823 mm; InRS62=−0.2166 mm; and |InRS62|/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 164 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 164 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.
(107) 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 160 and the optical axis; and HVT62 is a distance perpendicular to the optical axis between the critical point on the image-side surface 164 of the sixth lens 160 and the optical axis.
(108) 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.
(109) 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 is a distance perpendicular to the optical axis between the critical point on the object-side surface 172 of the seventh lens 170 and the optical axis; and HVT72 is a distance perpendicular to the optical axis between the critical point on the image-side surface 174 of the seventh lens 170 and the optical axis.
(110) 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.
(111) 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.
(112) 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 1≤NA7/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.
(113) 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.
(114) For the optical image capturing system of the first embodiment, the values of MTF in the spatial frequency of 55 cycles/mm at the optical axis, 0.3 field of view, and 0.7 field of view of visible light on an image plane are respectively denoted by MTFE0, MTFE3, and MTFE7, wherein MTFE0 is around 0.35, MTFE3 is around 0.14, and MTEF7 is around 0.28; the values of MTF in the spatial frequency of 110 cycles/mm at the optical axis, 0.3 field of view, and 0.7 field of view of visible light on an image plane are respectively denoted by MTFQ0, MTFQ3, and MTFQ7, wherein MTFQ0 is around 0.126, MTFQ3 is around 0.075, and MTFQ7 is around 0.177; the values of modulation transfer function (MTF) in the spatial frequency of 220 cycles/mm at the optical axis, 0.3 field of view, and 0.7 field of view on an image plane are respectively denoted by MTFH0, MTFH3, and MTFH7, wherein MTFH0 is around 0.01, MTFH3 is around 0.01, and MTFH7 is around 0.01.
(115) For the optical image capturing system of the first embodiment, when the infrared of wavelength of 850 nm focuses on the image plane, the values of MTF in spatial frequency (55 cycles/mm) at the optical axis, 0.3 HOI, and 0.7 HOI on an image plane are respectively denoted by MTFI0, MTFI3, and MTFI7, wherein MTFI0 is around 0.01, MTFI3 is around 0.01, and MTFI7 is around 0.01.
(116) The parameters of the lenses of the first embodiment are listed in Table 1 and Table 2.
(117) TABLE-US-00001 TABLE 1 f = 4.3019 mm; f/HEP = 1.2; HAF = 59.9968 deg Focal Thickness Refractive Abbe length Surface Radius of curvature (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 rays plane 0.200 BK_7 1.517 64.2 filter 17 plane 0.917 18 Image plane plane 0 Reference wavelength (d-line): 555 mm.
(118) TABLE-US-00002 TABLE 2 Coefficients of the aspheric surfaces Surface 1 2 3 4 5 6 8 k 2.500000E+01 −4.711931E−01 1.531617E+00 −1.153034E+01 −2.915013E+00 4.886991E+00 −3.459463E+01 A4 5.236918E−06 −2.117558E−04 7.146736E−05 4.353586E−04 5.793768E−04 −3.756697E−04 −1.292614E−03 A6 −3.014384E−08 −1.838670E−06 2.334364E−06 1.400287E−05 2.112652E−04 3.901218E−04 −1.602381E−05 A8 −2.487400E−10 9.605910E−09 −7.479362E−08 −1.688929E−07 −1.344586E−05 −4.925422E−05 −8.452359E−06 A10 1.170000E−12 −8.256000E−11 1.701570E−09 3.829807E−08 1.000482E−06 4.139741E−06 7.243999E−07 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 −5.583548E−03 1.240671E−04 6.467538E−04 −1.872317E−03 −8.967310E−04 −3.189453E−03 −2.815022E−03 A6 1.947110E−04 −4.949077E−05 −4.981838E−05 −1.523141E−05 −2.688331E−05 −1.058126E−05 1.884580E−05 A8 −1.486947E−05 2.088854E−06 9.129031E−07 −2.169414E−06 −8.324958E−07 1.760103E−06 −1.017223E−08 A10 −6.501246E−08 −1.438383E−08 7.108550E−09 −2.308304E−08 −6.184250E−09 −4.730294E−08 3.660000E−12 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
(119) 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
(120) As shown in
(121) The first lens 210 has positive 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 convex aspheric surface. The object-side surface 212 has an inflection point.
(122) The second lens 220 has negative refractive power and is made of plastic. An object-side surface 222 thereof, which faces the object side, is a concave aspheric surface, and an image-side surface 224 thereof, which faces the image side, is a concave aspheric surface. The object-side surface 222 and the image-side surface 224 both have an inflection point.
(123) The third lens 230 has negative refractive power and is made of plastic. 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 concave aspheric surface. The image-side surface 234 has an inflection point.
(124) The fourth lens 240 has positive refractive power and is made of plastic. 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. The object-side surface 242 has an inflection point, and the image-side surface 244 has an inflection point.
(125) The fifth lens 250 has positive refractive power and is made of plastic. 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 convex aspheric surface. The object-side surface 252 has an inflection point, and the image-side surface 254 has an inflection point.
(126) The sixth lens 260 has positive refractive power and is made of plastic. 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. The object-side surface 262 has an inflection point, and the image-side surface 264 has an inflection point. Whereby, the incident angle of each view field entering the sixth lens 260 can be effectively adjusted to improve aberration.
(127) 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 surface, and an image-side surface 274, which faces the image side, is a concave surface. It may help to shorten the back focal length to keep small in size. In addition, the object-side surface 272 and the image-side surface 274 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.
(128) 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.
(129) The parameters of the lenses of the second embodiment are listed in Table 3 and Table 4.
(130) TABLE-US-00003 TABLE 3 f = 6.3952 mm; f/HEP = 1.4; HAF = 49.9998 deg Radius of curvature Thickness Refractive Abbe Focal length Surface (mm) (mm) Material index number (mm) 0 Object 1E+18 1E+18 1 1.sup.st lens 9.618471181 0.441 glass 2.001 29.13 6.930 2 −24.86156152 −0.131 3 Aperture 1E+18 0.179 4 2.sup.nd lens −432.7166802 0.216 plastic 1.583 30.20 −10.440 5 6.211919599 0.767 6 3.sup.rd lens −52.72204695 0.311 plastic 1.661 20.40 −18.972 7 16.68296883 0.050 8 4.sup.th lens 12.59511741 2.304 plastic 1.565 58.00 6.599 9 −4.967558536 1.236 10 5.sup.th lens −2.808731413 1.545 plastic 1.565 58.00 18.075 11 −2.643138591 0.050 12 6.sup.th lens 37.54058936 0.578 plastic 1.640 23.30 8.093 13 −6.025577081 0.050 14 7.sup.th lens 4.675086583 0.904 plastic 1.661 20.40 −5.305 15 1.857980678 1.500 16 Infrared rays 1E+18 0.200 BK_7 1.517 64.2 filter 17 1E+18 0.999 18 Image plane 1E+18 0.050 Reference wavelength (d-line): 555 nm
(131) TABLE-US-00004 TABLE 4 Coefficients of the aspheric surfaces Surface 1 2 4 5 6 7 8 k 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 −5.000000E+01 A4 −3.515672E−03 3.222128E−03 5.981639E−03 −5.857957E−03 2.278942E−03 3.419243E−03 2.055166E−04 A6 −9.793959E−05 −8.774391E−04 −5.732172E−04 1.261473E−04 −2.349167E−03 −1.981604E−03 −5.498487E−04 A8 −1.214140E−04 −7.530876E−06 5.617946E−05 −6.336189E−05 1.900883E−04 2.483727E−04 9.252405E−05 A10 1.094388E−05 4.787140E−06 −1.075006E−06 −1.547612E−06 −1.404849E−05 −1.205946E−05 −5.923414E−06 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 6.281703E−01 −1.074549E+00 −2.641517E+00 −2.653801E+01 −5.000000E+01 −5.557222E+00 −3.653961E+00 A4 −3.088031E−03 2.235962E−03 −4.555544E−03 −3.717478E−03 −3.244719E−03 −4.605976E−03 −2.821213E−03 A6 3.950284E−04 1.735728E−04 4.531990E−04 5.439178E−05 4.891966E−05 8.999759E−05 7.587529E−05 A8 −3.777554E−05 2.369320E−06 −2.854883E−05 −1.260243E−06 5.820044E−06 −4.949781E−07 −1.177152E−06 A10 3.078891E−06 −2.571639E−07 7.240814E−07 4.325807E−08 −1.431215E−07 −1.929266E−08 3.458214E−09 A12 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00
(132) 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.
(133) The exact parameters of the second embodiment based on Table 3 and Table 4 are listed in the following table:
(134) TABLE-US-00005 Second embodiment (Reference wavelength: 555 nm) MTFE0 MTFE3 MTFE7 MTFQ0 MTFQ3 MTFQ7 0.59 0.47 0.47 0.32 0.21 0.24 ETP1 ETP2 ETP3 ETP4 ETP5 ETP6 0.194 0.344 0.652 1.548 1.507 0.301 ETP7 ETL EBL EIN EIR PIR 1.360 11.132 1.949 9.183 0.700 1.500 EIN/ETL SETP/EIN EIR/PIR SETP STP SETP/STP 0.825 0.643 0.467 5.906 6.299 0.938 ETP1/TP1 ETP2/TP2 ETP3/TP3 ETP4/TP4 ETP5/TP5 ETP6/TP6 0.440 1.592 2.095 0.672 0.975 0.521 ETP7/TP7 BL EBL/BL SED SIN SED/SIN 1.505 2.749 0.7090 3.277 2.202 1.489 ED12 ED23 ED34 ED45 ED56 ED67 0.290 0.292 0.075 1.029 0.894 0.697 ED12/IN12 ED23/IN23 ED34/IN34 ED45/IN45 ED56/IN56 ED67/IN67 6.000 0.381 1.507 0.833 17.874 13.934 |f/f1| |f/f2| |f/f3| |f/f4| |f/f5| |f/f6| 0.9228 0.6126 0.3371 0.9692 0.3538 0.7902 |f/f7| ΣPPR ΣNPR ΣPPR/|ΣNPR| IN12/f IN67/f 1.2055 3.0193 2.1719 1.3902 0.0076 0.0078 |f1/f2| |f2/f3| (TP1 + IN12)/TP2 (TP7 + IN67)/TP6 0.6638 0.5503 2.2666 1.6492 HOS InTL HOS/HOI InS/HOS ODT % TDT % 11.2500 8.5009 1.5000 0.9724 2.0107 4.0106 HVT11 HVT12 HVT21 HVT22 HVT31 HVT32 2.0434 0.0000 0.3130 2.2409 0.0000 2.2981 HVT61 HVT62 HVT71 HVT72 HVT72/HOI HVT72/HOS 1.3536 0.0000 2.9988 4.8111 0.6415 0.4277
(135) The results of the equations of the second embodiment based on Table 3 and Table 4 are listed in the following table:
(136) TABLE-US-00006 Values related to the inflection points of the second embodiment (Reference wavelength: 555 nm) HIF111 1.3102 HIF111/HOI 0.1747 SGI111 0.0779 |SGI111|/(|SGI111| + TP1) 0.1501 HIF211 0.1802 HIF211/HOI 0.0240 SGI211 −0.0000 |SGI211|/(|SGI211| + TP2) 0.0001 HIF221 1.4781 HIF221/HOI 0.1971 SGI221 0.1503 |SGI221|/(|SGI221| + TP2) 0.4103 HIF321 1.4074 HIF321/HOI 0.1877 SGI321 0.0609 |SGI321|/(|SGI321| + TP3) 0.1638 HIF411 1.5417 HIF411/HOI 0.2056 SGI411 0.0777 |SGI411|/(|SGI411| + TP4) 0.0326 HIF421 2.9178 HIF421/HOI 0.3890 SGI421 −1.0720 |SGI421|/(|SGI421| + TP4) 0.3175 HIF511 2.4039 HIF511/HOI 0.3205 SGI511 −0.9059 |SGI511|/(|SGI511| + TP5) 0.3696 HIF521 3.7736 HIF521/HOI 0.5031 SGI521 −2.1116 |SGI521|/(|SGI521| + TP5) 0.5774 HIF611 0.7747 HIF611/HOI 0.1033 SGI611 0.0066 |SGI611|/(|SGI611| + TP6) 0.0114 HIF621 3.3445 HIF621/HOI 0.4459 SGI621 −0.6418 |SGI621|/(|SGI621| + TP6) 0.5261 HIF711 1.5436 HIF711/HOI 0.2058 SGI711 0.2043 |SGI711|/(|SGI711| + TP7) 0.1844 HIF721 1.7691 HIF721/HOI 0.2359 SGI721 0.5665 |SGI721|/(|SGI721| + TP7) 0.3854
Third Embodiment
(137) As shown in
(138) The first lens 310 has positive 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.
(139) The second lens 320 has negative refractive power and is made of plastic. 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 and the image-side surface 324 both have an inflection point.
(140) The third lens 330 has positive refractive power and is made of plastic. An object-side surface 332 thereof, which faces the object side, is a convex aspheric surface, and an image-side surface 334 thereof, which faces the image side, is a convex aspheric surface. The object-side surface 332 has an inflection point.
(141) The fourth lens 340 has positive refractive power and is made of plastic. 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. The object-side surface 342 has an inflection point.
(142) 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 has two inflection points, and the image-side surface 354 has an inflection point.
(143) 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 concave aspheric surface, and an image-side surface 364, which faces the image side, is a convex aspheric surface. The object-side surface 362 has two inflection points, and the image-side surface 364 has an inflection point. Whereby, the incident angle of each view field entering the sixth lens 360 can be effectively adjusted to improve aberration.
(144) 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 convex 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, the object-side surface 372 has an inflection point, and the image-side surface 374 has 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.
(145) 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.
(146) The parameters of the lenses of the third embodiment are listed in Table 5 and Table 6.
(147) TABLE-US-00007 TABLE 5 f = 6.3551 mm; f/HEP = 1.4; HAF = 50.0000 deg Radius of curvature Thickness Refractive Abbe Focal length Surface (mm) (mm) Material index number (mm) 0 Object 1E+18 1E+18 1 1.sup.st lens 7.311305804 0.508 glass 2.001 29.13 10.390 2 23.41806008 0.126 3 Aperture 1E+18 −0.043 4 2.sup.nd lens 11.94686699 0.312 plastic 1.661 20.40 −18.604 5 6.022274725 0.676 6 3.sup.rd lens 270.2166058 0.755 plastic 1.565 58.00 42.882 7 −26.68005308 0.288 8 4.sup.th lens 20.95347426 0.648 plastic 1.565 58.00 14.538 9 −13.42832242 0.050 10 5.sup.th lens 4129.910969 0.628 plastic 1.661 20.40 −27.917 11 18.530658 0.372 12 6.sup.th lens −7.243535019 3.817 plastic 1.565 58.00 5.494 13 −2.592850156 0.050 14 7.sup.th lens 2.968936109 1.153 plastic 1.661 20.40 −8.877 15 1.670069327 1.000 16 Infrared rays 1E+18 0.200 BK_7 1.517 64.2 filter 17 1E+18 1.414 18 Image plane 1E+18 0.047 Reference wavelength (d-line): 555 nm.
(148) TABLE-US-00008 TABLE 6 Coefficients of the aspheric surfaces Surface 1 2 4 5 6 7 8 k 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 −5.000000E+01 A4 0.000000E+00 0.000000E+00 −5.253312E−03 −6.030777E−03 −2.602597E−03 −1.015339E−02 −6.803000E−03 A6 0.000000E+00 0.000000E+00 3.398044E−04 4.914265E−04 −4.484766E−04 −4.346792E−04 −1.898055E−03 A8 0.000000E+00 0.000000E+00 1.136920E−05 −6.732066E−05 1.772027E−05 6.918318E−05 2.285804E−04 A10 0.000000E+00 0.000000E+00 −5.168602E−06 1.335946E−06 −1.910603E−05 −1.437532E−05 −1.482606E−05 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 1.873906E+01 −5.000000E+01 −1.378096E+01 −2.381318E+01 −2.341100E+00 −5.380286E+00 −3.054417E+00 A4 −1.290747E−03 −1.035629E−02 −4.041872E−03 −1.491752E−03 −2.388974E−03 −1.223476E−03 −2.278114E−03 A6 −1.790949E−03 −1.125479E−04 −1.282060E−04 5.203381E−05 −2.123265E−05 −1.198723E−04 4.648209E−05 A8 3.203321E−04 7.224130E−05 1.001941E−05 8.022353E−06 −1.089346E−06 5.190853E−06 −5.266812E−07 A10 −2.422894E−05 −1.012852E−05 1.103937E−10 −2.830216E−07 1.828801E−07 −8.643538E−08 −6.123372E−10 A12 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00
(149) 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.
(150) The exact parameters of the third embodiment based on Table 5 and Table 6 are listed in the following table:
(151) TABLE-US-00009 Third embodiment (Reference wavelength: 555 nm) MTFE0 MTFE3 MTFE7 MTFQ0 MTFQ3 MTFQ7 0.69 0.55 0.59 0.3 0.28 0.27 ETP1 ETP2 ETP3 ETP4 ETP5 ETP6 0.267 0.500 0.515 0.498 0.901 3.236 ETP7 ETL EBL EIN EIR PIR 1.500 11.653 1.773 9.880 0.112 1.000 EIN/ETL SETP/EIN EIR/PIR SETP STP SETP/STP 0.848 0.751 0.112 7.417 7.820 0.948 ETP1/TP1 ETP2/TP2 ETP3/TP3 ETP4/TP4 ETP5/TP5 ETP6/TP6 0.526 1.605 0.682 0.769 1.434 0.848 ETP7/TP7 BL EBL/BL SED SIN SED/SIN 1.301 2.661 0.6663 2.463 1.519 1.622 ED12 ED23 ED34 ED45 ED56 ED67 0.090 0.220 0.485 0.145 0.080 1.444 ED12/IN12 ED23/IN23 ED34/IN34 ED45/IN45 ED56/IN56 ED67/IN67 1.085 0.325 1.685 2.896 0.216 28.880 |f/f1| |f/f2| |f/f3| |f/f4| |f/f5| |f/f6| 0.6117 0.3416 0.1482 0.4371 0.2276 1.1567 |f/f7| ΣPPR ΣNPR ΣPPR/|ΣNPR| IN12/f IN67/f 0.7159 2.3537 1.2852 1.8314 0.0131 0.0079 |f1/f2| |f2/f3| (TP1 + IN12)/TP2 (TP7 + IN67)/TP6 0.5585 0.4338 1.8970 0.3151 HOS InTL HOS/HOI InS/HOS ODT % TDT % 12.0000 9.3385 1.6000 0.9472 −1.2596 1.6892 HVT11 HVT12 HVT21 HVT22 HVT31 HVT32 0.0000 0.0000 0.0000 0.0000 0.5727 0.0000 HVT61 HVT62 HVT71 HVT72 HVT72/HOI HVT72/HOS 3.8255 0.0000 3.6513 5.2295 0.6973 0.4358
(152) The results of the equations of the third embodiment based on Table 5 and Table 6 are listed in the following table:
(153) TABLE-US-00010 Values related to the inflection points of the third embodiment (Reference wavelength: 555 nm) HIF211 1.3874 HIF211/HOI 0.1850 SGI211 0.0638 |SGI211|/(|SGI211| + TP2) 0.1700 HIF221 1.7856 HIF221/HOI 0.2381 SGI221 0.2189 |SGI221|/(|SGI221| + TP2) 0.4127 HIF311 0.3362 HIF311/HOI 0.0448 SGI311 0.0002 |SGI311|/(|SGI311| + TP3) 0.0002 HIF411 0.6547 HIF411/HOI 0.0873 SGI411 0.0087 |SGI411|/(|SGI411| + TP4) 0.0133 HIF511 0.0442 HIF511/HOI 0.0059 SGI511 0.0000 |SGI511|/(|SGI511| + TP5) 0.0000 HIF521 0.9938 HIF521/HOI 0.1325 SGI521 0.0224 |SGI521|/(|SGI521| + TP5) 0.0344 HIF522 3.6232 HIF522/HOI 0.4831 SGI522 −0.3699 |SGI522|/(|SGI522| + TP5) 0.3706 HIF611 2.4960 HIF611/HOI 0.3328 SGI611 −0.3299 |SGI611|/(|SGI611| + TP6) 0.0795 HIF621 3.8674 HIF621/HOI 0.5157 SGI621 −2.4486 |SGI621|/(|SGI621| + TP6) 0.3908 HIF711 1.8190 HIF711/HOI 0.2425 SGI711 0.4072 |SGI711|/(|SGI711| + TP7) 0.2611 HIF721 1.9219 HIF721/HOI 0.2563 SGI721 0.7263 |SGI721|/(|SGI721| + TP7) 0.3865
Fourth Embodiment
(154) As shown in
(155) The first lens 410 has positive 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 convex aspheric surface. The object-side surface 412 has two inflection points, and the image-side surface 414 has an inflection point.
(156) The second lens 420 has negative refractive power and is made of plastic. An object-side surface 422 thereof, which faces the object side, is a concave aspheric surface, and an image-side surface 424 thereof, which faces the image side, is a concave aspheric surface. The object-side surface 422 has an inflection point.
(157) The third lens 430 has positive refractive power and is made of plastic. An object-side surface 432 thereof, which faces the object side, is a convex aspheric surface, and an image-side surface 434 thereof, which faces the image side, is a convex aspheric surface. The object-side surface 432 has an inflection point.
(158) The fourth lens 440 has negative refractive power and is made of plastic. An object-side surface 442, which faces the object side, is a concave aspheric surface, and an image-side surface 444, which faces the image side, is a concave aspheric surface. The object-side surface 442 has an inflection point, and the image-side surface 444 has two inflection points.
(159) The fifth lens 450 has positive 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 convex aspheric surface. The object-side surface 452 has an inflection point, and the image-side surface 454 has an inflection point.
(160) 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 concave 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 entering the sixth lens 460 can be effectively adjusted to improve aberration.
(161) 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 convex aspheric surface, and an image-side surface 474, which faces the image side, is a concave aspheric surface. The object-side surface 472 has an inflection point, and the image-side surface 474 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.
(162) 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.
(163) The parameters of the lenses of the fourth embodiment are listed in Table 7 and Table 8.
(164) TABLE-US-00011 TABLE 7 f = 6.3416 mm; f/HEP = 1.4; HAF = 50.0001 deg Radius of curvature Thickness Refractive Abbe Focal length Surface (mm) (mm) Material index number (mm) 0 Object 1E+18 1E+18 1 1.sup.st lens 8.060806348 0.464 glass 2.001 29.13 6.457 2 −32.69610345 0.042 3 Aperture 1E+18 0.013 4 2.sup.nd lens −48.41379813 0.302 plastic 1.607 26.60 −8.068 5 5.502597319 0.614 6 3.sup.rd lens 23.55198437 1.870 plastic 1.565 58.00 7.600 7 −5.120686895 0.050 8 4.sup.th lens −43.90396444 0.733 plastic 1.661 20.40 −20.524 9 20.01626531 0.768 10 5.sup.th lens −5.250110051 1.614 plastic 1.565 58.00 55.468 11 −4.99927293 0.050 12 6.sup.th lens −4.090879102 1.426 plastic 1.565 58.00 9.716 13 −2.643227385 0.050 14 7.sup.th lens 3.544063947 1.502 plastic 1.661 20.40 −13.713 15 2.120957399 1.800 16 Infrared rays 1E+18 0.200 BK_7 1.517 64.2 filter 17 1E+18 0.333 18 Image plane 1E+18 0.045 Reference wavelength (d-line): 555 nm.
(165) TABLE-US-00012 TABLE 8 Coefficients of the aspheric surfaces Surface 1 2 4 5 6 7 8 k −6.632346E−01 4.608319E+01 5.000000E+01 −1.069464E+00 1.598200E+01 1.735827E+00 −5.000000E+01 A4 −8.751125E−04 1.131030E−02 1.558936E−02 −4.672758E−03 −1.418853E−03 −2.904622E−03 −9.060118E−03 A6 3.326652E−04 −2.443774E−03 −4.720184E−03 7.261899E−05 −3.443427E−04 8.879534E−06 −6.059265E−04 A8 −1.385626E−04 2.779980E−04 8.290451E−04 2.817648E−05 1.149256E−05 1.195794E−05 −6.913598E−06 A10 1.135853E−05 −9.213627E−06 −4.940385E−05 −1.989951E−06 −1.138589E−05 −1.821280E−06 6.044720E−06 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 −1.726970E+01 −9.324283E−01 −4.477778E−01 −7.095487E−01 −9.586706E−01 −4.489939E+00 −3.168316E+00 A4 −2.766400E−03 1.217035E−04 −1.565971E−03 6.176266E−03 5.859864E−03 −2.389821E−03 −2.720577E−03 A6 −5.724507E−04 −6.331365E−04 −2.035113E−04 −1.819286E−04 −2.198466E−05 −8.691246E−05 6.759150E−05 A8 4.245697E−05 8.659758E−05 1.478901E−05 2.691317E−06 −6.759165E−06 5.084918E−06 −8.812636E−07 A10 −3.393583E−07 −2.481574E−06 −5.429445E−08 −8.142693E−07 −1.722853E−07 −1.110144E−07 1.181828E−09 A12 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00
(166) 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.
(167) The exact parameters of the fourth embodiment based on Table 7 and Table 8 are listed in the following table:
(168) TABLE-US-00013 Fourth embodiment (Reference wavelength: 555 nm) MTFE0 MTFE3 MTFE7 MTFQ0 MTFQ3 MTFQ7 0.7 0.6 0.57 0.37 0.34 0.3 ETP1 ETP2 ETP3 ETP4 ETP5 ETP6 0.223 0.549 1.215 1.082 1.551 1.105 ETP7 ETL EBL EIN EIR PIR 1.785 11.594 1.607 9.987 1.029 1.800 EIN/ETL SETP/EIN EIR/PIR SETP STP SETP/STP 0.861 0.752 0.572 7.511 7.911 0.949 ETP1/TP1 ETP2/TP2 ETP3/TP3 ETP4/TP4 ETP5/TP5 ETP6/TP6 0.482 1.816 0.650 1.478 0.961 0.775 ETP7/TP7 BL EBL/BL SED SIN SED/SIN 1.188 2.379 0.6755 2.476 1.587 1.561 ED12 ED23 ED34 ED45 ED56 ED67 0.125 0.258 0.355 0.254 0.128 1.356 ED12/IN12 ED23/IN23 ED34/IN34 ED45/IN45 ED56/IN56 ED67/IN67 2.272 0.420 7.103 0.331 2.550 27.127 |f/f1| |f/f2| |f/f3| |f/f4| |f/f5| |f/f6| 0.9821 0.7860 0.8344 0.3090 0.1143 0.6527 |f/f7| ΣPPR ΣNPR ΣPPR/|ΣNPR| IN12/f IN67/f 0.4625 2.7781 1.3628 2.0386 0.0087 0.0079 |f1/f2| |f2/f3| (TP1 + IN12)/TP2 (TP7 + IN67)/TP6 0.8003 1.0615 1.7171 1.0885 HOS InTL HOS/HOI InS/HOS ODT % TDT % 11.8763 9.4978 1.5835 0.9574 2.1627 3.2317 HVT11 HVT12 HVT21 HVT22 HVT31 HVT32 0.0000 0.9671 0.6310 0.0000 1.7547 0.0000 HVT61 HVT62 HVT71 HVT72 HVT72/HOI HVT72/HOS 0.0000 0.0000 3.4027 5.1142 0.6819 0.4306
(169) The results of the equations of the fourth embodiment based on Table 7 and Table 8 are listed in the following table:
(170) TABLE-US-00014 Values related to the inflection points of the fourth embodiment (Reference wavelength: 555 nm) HIF111 2.0758 HIF111/HOI 0.2768 SGI111 0.2483 |SGI111|/(|SGI111| + TP1) 0.3487 HIF112 2.2752 HIF112/HOI 0.3034 SGI112 0.2887 |SGI112|/(|SGI112| + TP1) 0.3837 HIF121 0.5150 HIF121/HOI 0.0687 SGI121 −0.0033 |SGI121|/(|SGI121| + TP1) 0.0071 HIF211 0.3488 HIF211/HOI 0.0465 SGI211 −0.0010 |SGI211|/(|SGI211| + TP2) 0.0034 HIF311 1.1756 HIF311/HOI 0.1567 SGI311 0.0260 |SGI311|/(|SGI311| + TP3) 0.0137 HIF411 2.8340 HIF411/HOI 0.3779 SGI411 −0.8123 |SGI411|/(|SGI411| + TP4) 0.5258 HIF421 0.9923 HIF421/HOI 0.1323 SGI421 0.0212 |SGI421|/(|SGI421| + TP4) 0.0281 HIF422 3.1210 HIF422/HOI 0.4161 SGI422 −0.2160 |SGI422|/(|SGI422| + TP4) 0.2277 HIF511 2.6306 HIF511/HOI 0.3507 SGI511 −0.7066 |SGI511|/(|SGI511| + TP5) 0.3044 HIF521 3.5486 HIF521/HOI 0.4731 SGI521 −1.6619 |SGI521|/(|SGI521| + TP5) 0.5072 HIF711 1.7819 HIF711/HOI 0.2376 SGI711 0.3513 |SGI711|/(|SGI711| + TP7) 0.1895 HIF721 1.9580 HIF721/HOI 0.2611 SGI721 0.6362 |SGI721|/(|SGI721| + TP7) 0.2975
Fifth Embodiment
(171) As shown in
(172) The first lens 510 has positive 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 convex aspheric surface. The object-side surface 512 has two inflection points, and the image-side surface 514 has three inflection points.
(173) The second lens 520 has negative refractive power and is made of plastic. 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 two inflection points, and the image-side surface 524 has an inflection point.
(174) The third lens 530 has positive refractive power and is made of plastic. 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.
(175) 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.
(176) 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 image-side surface 554 has an inflection point.
(177) 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 concave 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, and the image-side surface 564 has an inflection point. Whereby, the incident angle of each view field entering the sixth lens 560 can be effectively adjusted to improve aberration.
(178) 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 convex surface, and an image-side surface 574, which faces the image side, is a concave 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 could effectively suppress the incidence angle of light in the off-axis view field, and correct the off-axis view field aberration.
(179) The infrared rays filter 580 is made of glass and between the seventh lens 570 and the image plane 590. The infrared rays filter 580 gives no contribution to the focal length of the system.
(180) The parameters of the lenses of the fifth embodiment are listed in Table 9 and Table 10.
(181) TABLE-US-00015 TABLE 9 f = 6.4044 mm; f/HEP = 1.4; HAF = 50.0000 deg Radius of curvature Thickness Refractive Abbe Focal length Surface (mm) (mm) Material index number (mm) 0 Object 1E+18 1E+18 1 1.sup.st lens 6.542109497 0.462 glass 2.001 29.13 6.383 2 −357.0900649 0.145 3 Aperture 1E+18 −0.095 4 2.sup.nd lens −47.91258137 0.200 plastic 1.607 26.60 −8.688 5 5.98006608 0.662 6 3.sup.rd lens 24.18118235 1.455 plastic 1.565 58.00 18.743 7 −18.53493788 0.186 8 4.sup.th lens 22.08973305 0.442 plastic 1.514 56.80 10.623 9 −7.234059452 0.050 10 5.sup.th lens −19.51688283 0.446 plastic 1.661 20.40 −15.627 11 22.56127517 0.684 12 6.sup.th lens −3.404690424 2.352 plastic 1.565 54.50 8.585 13 −2.50388046 0.050 14 7.sup.th lens 4.47930309 1.673 plastic 1.661 20.40 −15.291 15 2.647093769 1.500 16 Infrared rays 1E+18 0.200 BK_7 1.517 64.2 filter 17 1E+18 0.802 18 Image plane 1E+18 0.036 Reference wavelength (d-line): 555 nm; the position of blocking light: none.
(182) TABLE-US-00016 TABLE 10 Coefficients of the aspheric surfaces Surface 1 2 4 5 6 7 8 k 0.000000E+00 −5.000000E+01 2.934883E+01 1.270147E−01 −9.531827E−01 −5.484336E+00 2.167720E+01 A4 −2.798824E−03 1.409753E−03 1.241225E−02 5.231216E−03 −1.874173E−03 −1.748505E−02 −1.714669E−02 A6 −5.632021E−04 5.106194E−04 −3.086597E−04 −2.131715E−03 −2.137339E−06 1.044623E−03 −4.793560E−04 A8 −1.188733E−04 −3.050568E−04 1.001208E−04 4.156287E−04 −3.055664E−05 −1.908065E−05 2.664167E−06 A10 1.596807E−05 2.627584E−05 −1.695453E−05 −3.036834E−05 −8.176120E−07 −6.238776E−06 3.461532E−06 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 −2.181745E+01 4.084800E+01 −1.669264E+01 −4.379206E+00 −2.686311E+00 −3.403668E−01 −4.029276E+00 A4 −4.008342E−03 −9.231240E−03 −7.552707E−03 −1.355888E−03 −6.862600E−03 −7.813012E−03 −2.376038E−03 A6 −8.335650E−04 −1.477547E−05 1.332538E−04 1.149945E−05 3.513671E−04 1.567588E−04 6.106226E−05 A8 8.489338E−05 7.042535E−05 1.610644E−05 2.373483E−05 −2.422492E−05 −2.685606E−06 −1.023616E−06 A10 −1.044810E−05 −9.966524E−06 −7.754682E−07 −7.301227E−07 1.301749E−06 −5.830335E−08 3.220507E−09 A12 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00
(183) 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.
(184) The exact parameters of the fifth embodiment based on Table 9 and Table 10 are listed in the following table:
(185) TABLE-US-00017 Fifth embodiment (Reference wavelength: 555 nm) MTFE0 MTFE3 MTFE7 MTFQ0 MTFQ3 MTFQ7 0.58 0.54 0.45 0.29 0.3 0.25 ETP1 ETP2 ETP3 ETP4 ETP5 ETP6 0.213 0.438 0.927 0.367 0.777 2.002 ETP7 ETL EBL EIN EIR PIR 1.901 11.021 1.895 9.126 0.858 1.500 EIN/ETL SETP/EIN EIR/PIR SETP STP SETP/STP 0.828 0.726 0.572 6.624 7.301 0.942 ETP1/TP1 ETP2/TP2 ETP3/TP3 ETP4/TP4 ETP5/TP5 ETP6/TP6 0.461 2.192 0.637 0.829 1.742 0.851 ETP7/TP7 BL EBL/BL SED SIN SED/SIN 1.136 2.537 0.7469 2.502 1.682 1.487 ED12 ED23 ED34 ED45 ED56 ED67 0.314 0.212 0.298 0.115 0.140 1.423 ED12/IN12 ED23/IN23 ED34/IN34 ED45/IN45 ED56/IN56 ED67/IN67 6.199 0.320 1.603 2.304 0.205 28.460 |f/f1| |f/f2| |f/f3| |f/f4| |f/f5| |f/f6| 1.0034 0.7372 0.3417 0.6029 0.4098 0.7460 |f/f7| ΣPPR ΣNPR ΣPPR/|ΣNPR| IN12/f IN67/f 0.4188 2.6940 1.5658 1.7205 0.0079 0.0078 |f1/f2| |f2/f3| (TP1 + IN12)/TP2 (TP7 + IN67)/TP6 0.7347 0.4635 2.5644 0.7327 HOS InTL HOS/HOI InS/HOS ODT % TDT % 11.2500 8.7129 1.5000 0.9460 −2.0002 3.5556 HVT11 HVT12 HVT21 HVT22 HVT31 HVT32 2.2567 0.0000 0.6536 0.0000 1.9172 0.0000 HVT61 HVT62 HVT71 HVT72 HVT72/HOI HVT72/HOS 3.5386 0.0000 3.4449 4.7760 0.6368 0.4245
(186) The results of the equations of the fifth embodiment based on Table 9 and Table 10 are listed in the following table:
(187) TABLE-US-00018 Values related to the inflection points of the fifth embodiment (Reference wavelength: 555 nm) HIF111 1.4120 HIF111/HOI 0.1883 SGI111 0.1372 |SGI111|/(|SGI111| + TP1) 0.2289 HIF112 2.5493 HIF112/HOI 0.3399 SGI112 0.2174 |SGI112|/(|SGI112| + TP1) 0.3199 HIF121 0.3857 HIF121/HOI 0.0514 SGI121 −0.0002 |SGI121|/(|SGI121| + TP1) 0.0004 HIF122 1.3642 HIF122/HOI 0.1819 SGI122 0.0025 |SGI122|/(|SGI122| + TP1) 0.0054 HIF123 2.4361 HIF123/HOI 0.3248 SGI123 −0.0369 |SGI123|/(|SGI123| + TP1) 0.0739 HIF211 0.3763 HIF211/HOI 0.0502 SGI211 −0.0012 |SGI211|/(|SGI211| + TP2) 0.0061 HIF212 2.3683 HIF212/HOI 0.3158 SGI212 0.2813 |SGI212|/(|SGI212| + TP2) 0.5845 HIF221 2.3481 HIF221/HOI 0.3131 SGI221 0.5141 |SGI221|/(|SGI221| + TP2) 0.7199 HIF311 1.2400 HIF311/HOI 0.1653 SGI311 0.0272 |SGI311|/(|SGI311| + TP3) 0.0183 HIF411 0.4692 HIF411/HOI 0.0626 SGI411 0.0042 |SGI411|/(|SGI411| + TP4) 0.0093 HIF521 0.6999 HIF521/HOI 0.0933 SGI521 0.0090 |SGI521|/(|SGI521| + TP5) 0.0198 HIF611 2.3106 HIF611/HOI 0.3081 SGI611 −0.6241 |SGI611|/(|SGI611| + TP6) 0.2097 HIF621 3.1707 HIF621/HOI 0.4228 SGI621 −1.8232 |SGI621|/(|SGI621| + TP6) 0.4367 HIF711 1.8217 HIF711/HOI 0.2429 SGI711 0.3005 |SGI711|/(|SGI711| + TP7) 0.1522 HIF721 1.9690 HIF721/HOI 0.2625 SGI721 0.5233 |SGI721|/(|SGI721| + TP7) 0.2382
Sixth Embodiment
(188) As shown in
(189) The first lens 610 has positive 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. The object-side surface 612 and the image-side surface 614 both have two inflection points.
(190) The second lens 620 has negative refractive power and is made of plastic. An object-side surface 622 thereof, which faces the object side, is a concave 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.
(191) 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 convex aspheric surface, and an image-side surface 634, which faces the image side, is a convex aspheric surface. The object-side surface 632 has an inflection point.
(192) 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 concave aspheric surface, and an image-side surface 644, which faces the image side, is a convex aspheric surface. The object-side surface 642 has an inflection point.
(193) 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 convex aspheric surface.
(194) 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 concave surface, and an image-side surface 664, which faces the image side, is a convex surface. The image-side surface 664 has an inflection point. Whereby, the incident angle of each view field entering the sixth lens 660 can be effectively adjusted to improve aberration.
(195) 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 convex surface, and an image-side surface 674, which faces the image side, is a concave surface. The object-side surface 672 has an inflection point, and 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.
(196) 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.
(197) The parameters of the lenses of the sixth embodiment are listed in Table 11 and Table 12.
(198) TABLE-US-00019 TABLE 11 f = 6.1663 mm; f/HEP = 1.4; HAF = 50.0000 deg Radius of curvature Thickness Refractive Abbe Focal length Surface (mm) (mm) Material index number (mm) 0 Object 1E+18 1E+18 1 1.sup.st lens 6.066464721 0.449 glass 2.001 29.13 6.383 2 282.2699822 0.218 3 Aperture 1E+18 −0.168 4 2.sup.nd lens −632.6427209 0.200 plastic 1.607 26.60 −8.688 5 4.725227328 0.581 6 3.sup.rd lens 12.33931322 1.468 plastic 1.565 58.00 18.743 7 −15.91761039 0.336 8 4.sup.th lens −2321.565531 0.697 plastic 1.565 58.00 10.623 9 −14.21362143 0.812 10 5.sup.th lens −2.063968959 0.716 plastic 1.661 20.40 −15.627 11 −3.129442768 0.050 12 6.sup.th lens −7.2540908 1.170 plastic 1.565 54.50 8.585 13 −2.848991784 0.050 14 7.sup.th lens 3.399458948 1.337 plastic 1.661 20.40 −15.291 15 2.373606687 1.500 16 Infrared rays 1E+18 0.200 BK_7 1.517 64.2 filter 17 1E+18 0.861 18 Image plane 1E+18 0.022 Reference wavelength (d-line): 555 nm; the position of blocking light: none.
(199) TABLE-US-00020 TABLE 12 Coefficients of the aspheric surfaces Surface 1 2 4 5 6 7 8 k −2.003076E−01 −5.000000E+01 5.000000E+01 1.684783E−01 −8.628211E−01 2.830256E−01 5.000000E+01 A4 −3.563531E−03 3.266048E−03 1.360396E−02 1.371272E−03 −2.120979E−03 −1.122485E−02 −1.501592E−02 A6 −6.728569E−04 1.017092E−04 −9.394013E−06 −1.154570E−03 9.383408E−05 −2.945176E−04 −1.221291E−03 A8 −5.031179E−05 −2.533659E−04 −4.275215E−05 2.634353E−04 −4.752016E−05 8.566114E−05 1.519131E−04 A10 1.361132E−05 2.803709E−05 −5.117044E−06 −2.108117E−05 −2.241886E−06 −1.059370E−05 −7.715119E−07 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 2.027347E+01 −1.374438E+00 −1.747416E+00 −4.258495E+01 −2.774770E+00 −4.828195E+00 −4.064610E+00 A4 −6.417702E−03 −6.309330E−03 −1.424481E−03 2.699723E−03 8.800963E−05 −2.873726E−03 −2.189587E−03 A6 −1.489020E−03 6.294078E−04 2.525774E−04 −5.170184E−04 3.670397E−05 −1.260535E−05 3.741687E−05 A8 1.867809E−04 4.570895E−05 5.336888E−06 3.426269E−05 4.749380E−06 3.156151E−06 −2.180933E−07 A10 −1.021600E−05 −9.413242E−06 −1.065466E−06 −1.166749E−06 −2.026267E−07 −5.880215E−08 −3.721709E−09 A12 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00
(200) 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.
(201) The exact parameters of the sixth embodiment based on Table 11 and Table 12 are listed in the following table:
(202) TABLE-US-00021 Sixth embodiment (Reference wavelength: 555 nm) MTFE0 MTFE3 MTFE7 MTFQ0 MTFQ3 MTFQ7 0.6 0.58 0.54 0.32 0.28 0.31 ETP1 ETP2 ETP3 ETP4 ETP5 ETP6 0.224 0.461 0.927 0.662 1.135 0.678 ETP7 ETL EBL EIN EIR PIR 1.511 10.243 1.938 8.305 0.854 1.500 EIN/ETL SETP/EIN EIR/PIR SETP STP SETP/STP 0.811 0.674 0.570 5.597 6.037 0.927 ETP1/TP1 ETP2/TP2 ETP3/TP3 ETP4/TP4 ETP5/TP5 ETP6/TP6 0.499 2.303 0.631 0.950 1.586 0.579 ETP7/TP7 BL EBL/BL SED SIN SED/SIN 1.130 2.583 0.7503 2.708 1.880 1.441 ED12 ED23 ED34 ED45 ED56 ED67 0.286 0.178 0.358 0.117 0.569 1.200 ED12/IN12 ED23/IN23 ED34/IN34 ED45/IN45 ED56/IN56 ED67/IN67 5.710 0.307 1.065 0.144 11.380 23.996 |f/f1| |f/f2| |f/f3| |f/f4| |f/f5| |f/f6| 1.0026 0.8035 0.4933 0.2444 0.4960 0.8167 |f/f7| ΣPPR ΣNPR ΣPPR/|ΣNPR| IN12/f IN67/f 0.2502 3.0530 1.0538 2.8972 0.0081 0.0081 |f1/f2| |f2/f3| (TP1 + IN12)/TP2 (TP7 + IN67)/TP6 0.8015 0.6140 2.4954 1.1849 HOS InTL HOS/HOI InS/HOS ODT % TDT % 10.5000 7.9166 1.4000 0.9365 2.0047 0.6869 HVT11 HVT12 HVT21 HVT22 HVT31 HVT32 0.0000 0.0000 0.1704 0.0000 2.1881 0.0000 HVT61 HVT62 HVT71 HVT72 HVT72/HOI HVT72/HOS 0.0000 0.0000 3.6653 4.8015 0.6402 0.4573
(203) The results of the equations of the sixth embodiment based on Table 11 and Table 12 are listed in the following table:
(204) TABLE-US-00022 Values related to the inflection points of the sixth embodiment (Reference wavelength: 555 nm) HIF111 1.4360 HIF111/HOI 0.1915 SGI111 0.1505 |SGI111|/(|SGI111| + TP1) 0.2510 HIF112 2.3410 HIF112/HOI 0.3121 SGI112 0.2701 |SGI112|/(|SGI112| + TP1) 0.3756 HIF121 1.5661 HIF121/HOI 0.2088 SGI121 0.0188 |SGI121|/(|SGI121| + TP1) 0.0402 HIF122 2.1491 HIF122/HOI 0.2866 SGI122 0.0315 |SGI122|/(|SGI122| + TP1) 0.0656 HIF211 0.0984 HIF211/HOI 0.0131 SGI211 −0.0000 |SGI211|/(|SGI211| + TP2) 0.0000 HIF311 1.5146 HIF311/HOI 0.2019 SGI311 0.0815 |SGI311|/(|SGI311| + TP3) 0.0526 HIF411 2.7519 HIF411/HOI 0.3669 SGI411 −0.9127 |SGI411|/(|SGI411| + TP4) 0.5671 HIF621 2.5461 HIF621/HOI 0.3395 SGI621 −0.8709 |SGI621|/(|SGI621| + TP6) 0.4266 HIF711 1.7419 HIF711/HOI 0.2323 SGI711 0.3429 |SGI711|/(|SGI711| + TP7) 0.2041 HIF721 1.9110 HIF721/HOI 0.2548 SGI721 0.5365 |SGI721|/(|SGI721| + TP7) 0.2864
(205) 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.