IMAGE SENSING DEVICE
20220121016 · 2022-04-21
Assignee
Inventors
Cpc classification
H04N23/57
ELECTRICITY
G03B17/17
PHYSICS
G03B2205/0007
PHYSICS
H04N23/55
ELECTRICITY
G03B30/00
PHYSICS
G03B5/00
PHYSICS
H04N23/69
ELECTRICITY
G02B27/646
PHYSICS
International classification
G02B13/00
PHYSICS
G02B15/14
PHYSICS
G02B27/64
PHYSICS
G03B5/00
PHYSICS
Abstract
An image sensing device includes a first light path changing element, a second light path changing element, and a plane lens. The first light path changing element includes a first light-incident side and a first light-emergent side, where the first light-incident side faces an image-capturing direction, the first light-emergent side faces a zoom optical axis, and there is an angle between the first light-incident side and the first light-emergent side. The second light path changing element includes a second light-incident side and a second light-emergent side, where the second light-incident side faces the zoom optical axis, the second light-emergent side faces an image-forming direction. An angle is between the second light-incident side and the second light-emergent side. An image-capturing light path passes through the first light-incident side, the first light-emergent side, the second light-incident side, and the second light-emergent side. The plane lens is disposed on the image-capturing light path.
Claims
1. An image sensing device, comprising: a first light path changing element, comprising a first light-incident side and a first light-emergent side, wherein the first light-incident side faces an image-capturing direction, the first light-emergent side faces a zoom optical axis, and there is a first angle between the first light-incident side and the first light-emergent side; a second light path changing element, comprising a second light-incident side and a second light-emergent side, wherein the second light-incident side faces the zoom optical axis, so that the first light-emergent side and the second light-incident side are disposed opposite to each other along the zoom optical axis; the second light-emergent side faces an image-forming direction, and there is a second angle between the second light-incident side and the second light-emergent side; and an image-capturing light path is formed between the first light path changing element and the second light path changing element, and sequentially passes through the first light-incident side, the first light-emergent side, the second light-incident side, and the second light-emergent side; and a plane lens, disposed on the image-capturing light path.
2. The image sensing device according to claim 1, wherein the first light path changing element is a first prism, comprising a first light-incident surface and a first light-emergent surface, wherein the first light-incident side is the first light-incident surface of the first prism, and the first light-emergent side is the first light-emergent surface of the first prism; and/or the second light path changing element is a second prism, comprising a second light-incident surface and a second light-emergent surface, wherein the second light-incident side is the second light-incident surface of the second prism, and the second light-emergent side is the second light-emergent surface of the second prism.
3. The image sensing device according to claim 1, wherein the first light path changing element is a first reflector, which is disposed at an angle to the image-capturing direction and is disposed at an angle to the zoom optical axis; and/or the second light path changing element is a second reflector, which is disposed at an angle to the image-forming direction and is disposed at an angle to the zoom optical axis.
4. The image sensing device according to claim 1, wherein the plane lens is a metalens or a multi-level diffractive lens (MDL).
5. The image sensing device according to claim 4, wherein there are a plurality of plane lenses, one of the plurality of plane lenses is a metalens, and another one of the plurality of plane lenses is an MDL.
6. The image sensing device according to claim 1, wherein the first light path changing element comprises a first light-incident surface and a first light-emergent surface, and the plane lens is disposed corresponding to the first light-incident surface.
7. The image sensing device according to claim 6, further comprising: a lens group, located between the first light path changing element and the second light path changing element.
8. The image sensing device according to claim 1, wherein the plane lens is located between the first light path changing element and the second light path changing element, and the zoom optical axis passes through the plane lens.
9. The image sensing device according to claim 8, further comprising: a focusing mechanism, connected to the plane lens, and configured to drive the plane lens to move along the zoom optical axis.
10. The image sensing device according to claim 8, further comprising: a lens group, located between the first light path changing element and the second light path changing element.
11. The image sensing device according to claim 10, wherein the plane lens is located between a plurality of lenses of the lens group.
12. The image sensing device according to claim 1, further comprising: an image sensor, disposed corresponding to the second light-emergent side.
13. The image sensing device according to claim 12, further comprising: a vibration compensation element, wherein the first light path changing element, the second light path changing element, and the plane lens together form a focal point, and the vibration compensation element is configured to adjust a landing point of the focal point on the image sensor.
14. The image sensing device according to claim 13, wherein the vibration compensation element is a vibration compensation lens group, is disposed on the image-capturing light path, and is configured to deflect light to adjust the landing point of the focal point on the image sensor.
15. The image sensing device according to claim 13, wherein the vibration compensation element is a multi-axis rotary actuator, is connected to the second light path changing element, and is configured to rotate the second light path changing element in a multi-axial direction.
16. The image sensing device according to claim 13, wherein the vibration compensation element is a multi-axis translational actuator, is connected to the image sensor, and is configured to translate the image sensor in a multi-axial direction.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
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DETAILED DESCRIPTION
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[0026] The first light path changing element 110 includes a first light-incident side 111 and a first light-emergent side 112. The first light-incident side 111 faces an image-capturing direction C, and the first light-emergent side 112 faces a zoom optical axis L. There is a first angle between the first light-incident side 111 and the first light-emergent side 112. The first angle may be a 90-degree angle, but other angles are not excluded. In an embodiment, the first light path changing element 110 is a first prism, and the first light-incident side 111 and the first light-emergent side 112 are a first light-incident surface and a first light-emergent surface of the first prism respectively. In a second embodiment, as shown in
[0027] The second light path changing element 120 includes a second light-incident side 121 and a second light-emergent side 122. The second light-incident side 121 faces the zoom optical axis L, so that the first light-emergent side 112 of the first light path changing element 110 and the second light-incident side 121 of the second light path changing element 120 are disposed opposite to each other along the zoom optical axis L. The second light-emergent side 122 faces an image-forming direction I. There is a second angle between the second light-incident side 121 and the second light-emergent side 122. The second angle may be a 90-degree angle, but other angles are not excluded. In an embodiment, the second light path changing element 120 is a second prism, and the second light-incident side 121 and the second light-emergent side 122 are a second light-incident surface and a second light-emergent surface of the second prism respectively. In the second embodiment, as shown in
[0028] An image-capturing light path is formed between the first light path changing element 110 and the second light path changing element 120, and sequentially passes through the first light-incident side 111, the first light-emergent side 112, the second light-incident side 121, and the second light-emergent side 122.
[0029] The plane lens 130 may be a metalens or a multi-level diffractive lens (MDL). The plane lens 130 is disposed on the image-capturing light path. In some embodiments, the plane lens 130 is located between the first light path changing element 110 and the second light path changing element 120, and the zoom optical axis L passes through the plane lens 130.
[0030] As shown in
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[0034] According to the following sag function (Formula 1), an aspheric lens in the image sensing device 100 is described:
[0035] where Z is a surface profile of a surface parallel to the optical axis; s is a radial distance from the optical axis; C is a curvature; k is a conic constant; and A.sub.4, A.sub.6, A.sub.8, and A.sub.10 are 4.sup.th-order, 6.sup.th-order, 8.sup.th-order, and 10.sup.th-order aspheric coefficients. Table 2 is a coefficient table of an aspheric formula of the image sensing device disclosed in the third embodiment of the present disclosure, referring to Table 1 and Table 2 together supplemented with the foregoing Formula 1. The surface s305 of the lens 161 is used as an example. A profile of the surface s305 is described by using Formula 1, where a conic constant k is 0, 4.sup.th-order, 6.sup.th-order, 8.sup.th-order, and 10.sup.th-order aspheric coefficients are sequentially 5.08E-04, 8.14E-05, 4.17E-06, and −1.69E-07, and a curvature radius is 2.922 mm.
[0036] According to the following Binary 2 surface phase formula (Formula 2), the plane lens 130 in the image sensing device 100 is described:
φ=MΣ.sub.i=1.sup.NA.sub.iρ.sup.2i (Formula 2)
[0037] where φ is a phase; M is a diffraction order; N is a series of polynomial coefficients; and A.sub.i is a polynomial coefficient in a normalized radial aperture coordinate ρ.sup.2i, and ρ is an element radius. Table 3 is a coefficient table of the Binary 2 surface phase formula of the plane lens disclosed in the third embodiment of the present disclosure, referring to Table 3 supplemented with the foregoing Formula 2. The surface s301 of the plane lens 130 is used as an example, and a surface phase change of the surface s305 is described by using Formula 2, where ρ.sup.2, ρ.sup.4, ρ.sup.6, and ρ.sup.8 are sequentially −2.75E+05, −4.17E+07, −5.04E+10, and −1.17E+13.
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[0046] As shown in
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[0050] In summary, by using a characteristic of a short focal length of the plane lens 130 in the present disclosure, high magnification zooming may be completed within a short light path. Therefore, a distance between the first light path changing element 110 and the second light path changing element 120 may be effectively shortened; and the existing lens group 160 does not need to be configured to perform high magnification zooming, and one or more lenses of the lens group 160 only need to be shifted within a short stroke, thereby effectively reducing a production difficulty.
[0051] In the content recorded in this specification, when the terms “include”, “comprise” or “have” are used, other elements, components, structures, areas, components, devices, systems, steps, connections, and the like may be additionally included unless otherwise stated, and other specifications shall not be excluded.
[0052] The features such as a proportional relationship, a structure, and a size shown in the figures of the present invention are only intended to describe the embodiments described in the present disclosure, to help a person of ordinary skill in the art to which the present invention belongs read and understand the present invention, are not intended to limit the scope of the claims of the present invention. In addition, any changes, modifications, or adjustments to the content recorded in the foregoing embodiments shall fall within the scope of the claims of the present invention, without affecting the inventive objectives and effects of the present disclosure.
TABLE-US-00001 TABLE 1 a lens parameter table of the image sensing device disclosed in the third embodiment of the present disclosure: Curvature Optical axis Refraction Dispersion Surface Object radius path length coefficient coefficient s301 Plane lens 130 — 0.5 1.460 67.800 s302 — — 0.35 — — s303 First light path Infinity 5.800 1.85 23.79 changing element 110 s304 — Infinity 0.700 — — s305 Lens 161 2.922 2.250 1.540 56.000 s306 — 455.122 0.285 — — s307 Lens 162 32.932 0.150 1.640 22.400 s308 — 5.133 0.245 — — s309 Aperture stop Infinity 2.377 — — 164 s310 Lens 163 −21.016 0.289 1.540 56.000 s311 — 4.991 0.720 — — s312 Second light Infinity 5.800 1.85 23.79 path changing element 120 s313 — Infinity 0.200 — — s314 — Infinity 0.210 1.520 64.200 s315 — Infinity 0.200 — — s316 Image sensor — — — — 140 Note: The curvature radius and the optical axis path length are measured in mm.
TABLE-US-00002 TABLE 2 a coefficient table of an aspheric formula of an image sensing device disclosed in a third embodiment of the present disclosure: Surface k A4 A6 A8 A10 s305 0 5.08E−04 8.14E−05 4.17E−06 −1.69E−07 s306 0 9.58E−03 −3.71E−03 8.17E−04 −6.13E−05 s307 0 −2.24E−03 −5.93E−04 2.23E−03 −3.59E−04 s308 0 −3.07E−03 4.98E−03 1.86E−03 1.16E−04 s310 0 −5.15E−02 3.32E−02 −2.44E−03 −4.33E−04 s311 0 −4.66E−02 3.22E−02 −4.47E−03 5.19E−04
TABLE-US-00003 TABLE 3 a coefficient table of a Binary 2 surface phase formula of a plane lens disclosed in the third embodiment of the present disclosure: Normalized Sur- curvature face radius ρ.sup.2 ρ.sup.4 ρ.sup.6 ρ.sup.8 s301 100 −2.75E+05 −4.17E+07 −5.04E+10 −1.17E+13 s302 100 3.23E+05 9.08E+07 −3.67E+09 3.06E+13
TABLE-US-00004 TABLE 4 a lens parameter table of an image sensing device disclosed in a fourth embodiment of the present disclosure: Curva- Sur- ture Optical axis Refraction Dispersion face Object radius path length coefficient coefficient s401 First light Infinity 5.800 1.85 23.79 path changing element 110 s402 — Infinity 0.700 — — s403 Lens 161 2.922 2.250 1.540 56.000 s404 — 455.122 0.285 — — s405 Lens 162 32.932 0.150 1.640 22.400 s406 — 5.133 0.245 — — s407 Aperture Infinity 2.377 — — stop 164 s408 Lens 163 −4.473 0.292 1.540 56.000 s409 — 263.852 0.100 — — s410 Plane Infinity 0.500 1.460 67.800 lens 130 s411 — Infinity 0.200 — — s412 Second Infinity 5.800 1.85 23.79 light path changing element 120 s413 — Infinity 0.200 — — s414 — Infinity 0.210 1.520 64.200 s415 — Infinity 0.200 — — s416 Image — — — — sensor 140 Note: The curvature radius and the optical axis path length are measured in mm.
TABLE-US-00005 TABLE 5 a coefficient table of an aspheric formula of the image sensing device disclosed in the fourth embodiment of the present disclosure: Surface k A4 A6 A8 A10 s403 0 6.02E−04 8.19E−05 9.34E−07 2.21E−06 s404 0 1.19E−02 −3.26E−03 8.86E−04 −1.22E−04 s405 0 −6.07E−04 −4.20E−04 2.05E−03 −4.58E−04 s406 0 −4.94E−03 4.35E−03 1.64E−03 −1.37E−04 s408 0 −5.92E−02 3.32E−02 −2.38E−03 −3.30E−04 s409 0 −4.97E−02 3.01E−02 −4.35E−03 5.14E−04
TABLE-US-00006 TABLE 6 a coefficient table of a Binary 2 surface phase formula of a plane lens disclosed in the fourth embodiment of the present disclosure: Normalized Sur- curvature face radius ρ.sup.2 ρ.sup.4 ρ.sup.6 ρ.sup.8 s410 5 7.46E+03 3.37E+04 5.97E+04 −2.12E+06 s411 5 −7.18E+03 −2.87E+04 −2.63E+05 3.63E+06
TABLE-US-00007 TABLE 7 a lens parameter table of the image sensing device disclosed in the fifth embodiment of the present disclosure: Refrac- Disper- Curva- Optical tion sion ture axis path coe- coe- Surface Object radius length fficient fficient s501 First light path Infinity 5.800 1.85 23.79 changing element 110 s502 — Infinity 0.700 — — s503 Lens 161 2.979 2.250 1.540 56.000 s504 — −566.158 0.285 — — s505 Lens 162 22.587 0.150 1.640 22.400 s506 — 4.970 0.245 — — s507 Plane lens 130 Infinity 0.500 1.460 67.800 s508 — Infinity 0.200 — — s509 Aperture stop Infinity 2.041 — — 164 s510 Lens 163 −3.434 0.234 1.540 56.000 s511 — −15.586 0.245 — — s512 Second light Infinity 5.800 1.85 23.79 path changing element 120 s513 — Infinity 0.200 — — s514 — Infinity 0.210 1.520 64.200 s515 — Infinity 0.200 — — s516 Image sensor — — — 140 Note: The curvature radius and the optical axis path length are measured in mm.
TABLE-US-00008 TABLE 8 a coefficient table of an aspheric formula of the image sensing device disclosed in the fifth embodiment of the present disclosure: Surface k A4 A6 A8 A10 s503 0 4.12E−04 8.14E−05 −9.32E−06 2.73E−06 s504 0 1.17E−02 −3.23E−03 8.96E−04 −1.15E−04 s505 0 −3.16E−05 −3.20E−04 2.06E−03 −4.69E−04 s506 0 −5.18E−03 4.29E−03 1.52E−03 −1.90E−04 s510 0 −5.97E−02 3.21E−02 −2.98E−03 −4.54E−04 s511 0 −5.08E−02 2.98E−02 −4.59E−03 1.94E−04
TABLE-US-00009 TABLE 9 a coefficient table of a Binary 2 surface phase formula of a plane lens disclosed in the fifth embodiment of the present disclosure: Normalized Sur- curvature face radius ρ.sup.2 ρ.sup.4 ρ.sup.6 ρ.sup.8 s507 1.00E+02 4.30E+05 6.26E+07 −3.15E+12 −3.54E+15 s508 1.00E+02 −3.08E+05 3.41E+08 1.33E+12 2.65E+16
TABLE-US-00010 TABLE 10 a lens parameter table of an image sensing device disclosed in a sixth embodiment of the present disclosure: Optical Refrac- Disper- Curv- axis tion sion Sur- ature path coe- coe- face Object radius length fficient fficient s601 First light path Infinity 5.800 1.85 23.79 changing element 110 s602 — Infinity 0.700 — — s603 Lens 161 2.949 2.250 1.540 56.000 s604 — 175.377 0.285 — — s605 Lens 162 76.715 0.150 1.640 22.400 s606 — 5.807 0.245 — — s607 Aperture stop Infinity 2.144 — — 164 s608 Lens 163 −6.347 0.284 1.540 56.000 s609 — 20.401 0.100 — — s610 Plane lens Infinity 0.500 1.460 67.800 130a s611 — Infinity 0.200 — — s612 Plane lens Infinity 0.500 1.460 67.800 130b s613 Infinity 0.200 — — s614 Second light Infinity 5.800 1.85 23.79 path changing element 120 s615 — Infinity 0.200 — — s616 — Infinity 0.210 1.520 64.200 s617 — Infinity 0.200 — — s618 Image sensor — — — — 140 Note: The curvature radius and the optical axis path length are measured in mm.
TABLE-US-00011 TABLE 11 a coefficient table of an aspheric formula of the image sensing device disclosed in the sixth embodiment of the present disclosure: Surface k A4 A6 A8 A10 s607 0 8.06E−04 1.14E−04 −2.01E−07 3.22E−06 s608 0 1.26E−02 −3.49E−03 1.02E−03 −1.43E−04 s609 0 −5.74E−04 −9.24E−05 2.32E−03 −4.93E−04 s610 0 −6.16E−03 5.44E−03 1.45E−03 −7.96E−06 s612 0 −5.82E−02 3.11E−02 −1.26E−03 −5.17E−04 s613 0 −4.96E−02 3.08E−02 −4.39E−03 5.27E−04
TABLE-US-00012 TABLE 12 a coefficient table of a Binary 2 surface phase formula of a plane lens disclosed in the sixth embodiment of the present disclosure: Normalized Sur- curvature face radius ρ.sup.2 ρ.sup.4 ρ.sup.6 ρ.sup.8 s614 5 2.16E+03 −1.92E+03 5.83E+04 2.29E+05 s615 5 −3.47E+03 −2.81E+03 2.02E+04 −3.65E+05 s616 5 7.46E+03 3.37E+04 5.97E+04 −2.12E+06 s617 5 −5.85E+03 −2.60E+04 −2.53E+05 3.13E+06
TABLE-US-00013 TABLE 13 a lens parameter table of an image sensing device disclosed in a seventh embodiment of the present disclosure: Sur- Curvature Optical axis Refraction Dispersion face Object radius path length coefficient coefficient s701 First light path Infinity 5.800 1.7 59.05 changing element 110 s702 — Infinity 0.700 — — s703 Vibration Infinity 0.600 1.7 59.05 compensation element 170a s704 — Infinity 0.800 — — s705 Vibration Infinity 0.600 1.7 59.05 compensation element 170b s706 — Infinity 0.800 — — s707 Lens 161 2.803 2.253 1.540 56.000 s708 — −63.100 0.285 — — s709 Lens 162 36.683 0.150 1.640 22.400 s710 — 4.545 0.245 — — s711 Aperture stop Infinity 2.507 — — 164 s712 Lens 163 −2.022 0.150 1.540 56.000 s713 — −5.516 0.100 — — s714 Plane lens 130 Infinity 0.500 1.460 67.800 s715 — Infinity 0.200 — — s716 Second light Infinity 5.800 1.85 23.79 path changing element 120 s717 — Infinity 0.200 — — s718 — Infinity 0.210 1.520 64.200 s719 — Infinity 0.200 — — s720 Image sensor — — — — 140 Note: The curvature radius and the optical axis path length are measured in mm.
TABLE-US-00014 TABLE 14 a coefficient table of an aspheric formula of the image sensing device disclosed in the seventh embodiment of the present disclosure: Surface k A4 A6 A8 A10 s707 0 −3.24E−04 2.35E−07 −1.17E−05 4.88E−07 s708 0 1.06E−02 −3.83E−03 7.01E−04 −4.61E−05 s709 0 −1.98E−04 −4.72E−03 1.65E−03 −1.53E−04 s710 0 −6.27E−03 1.10E−03 1.45E−04 1.86E−04 s712 0 −5.83E−02 2.81E−02 1.52E−03 −3.52E−03 s713 0 −5.47E−02 3.43E−02 −7.95E−03 1.95E−04
TABLE-US-00015 TABLE 15 a coefficient table of a Binary 2 surface phase formula of a plane lens disclosed in the seventh embodiment of the present disclosure: Normalized Sur- curvature face radius ρ.sup.2 ρ.sup.4 ρ.sup.6 ρ.sup.8 s714 5 −6.20E+03 −1.58E+04 −5.73E+02 1.00E+05 s715 5 6.85E+03 7.34E+03 1.72E+05 −9.59E+05