CN107608059B - Micro-distortion high-resolution large-view-field optical lens - Google Patents
Micro-distortion high-resolution large-view-field optical lens Download PDFInfo
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- CN107608059B CN107608059B CN201711089210.2A CN201711089210A CN107608059B CN 107608059 B CN107608059 B CN 107608059B CN 201711089210 A CN201711089210 A CN 201711089210A CN 107608059 B CN107608059 B CN 107608059B
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Abstract
The invention discloses a micro-distortion high-resolution large-view-field optical lens, which comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens and a ninth lens which are sequentially arranged from an object side to an image side along an optical axis; the concave surfaces of the first lens, the second lens and the third lens are in a meniscus shape, the concave surfaces face to the image side, and the second lens and the third lens have negative focal power; the fourth lens convex surface is glued with the fifth lens concave surface, the fourth lens convex surface faces the image side, and the fifth lens convex surface faces the image side; the concave surface of the sixth lens faces the image side; the seventh lens convex surface faces the image side; the eighth lens convex surface is glued with the ninth lens concave surface, the eighth lens convex surface faces the image side, and the ninth lens convex surface faces the image side; a diaphragm is arranged between the fifth lens group and the sixth lens; the optical lens assembly has the advantages of small optical distortion and large field of view because each lens is a glass spherical lens.
Description
Technical Field
The invention relates to the field of optical systems, in particular to a micro-distortion high-resolution large-view-field optical lens.
Background
In unmanned aerial vehicle, face identification, survey and drawing, high appearance etc. environment use, traditional wide-angle lens exists the distortion big, and the resolution ratio is low, if adopt glass and plastics lens combination mode, face the challenge in the aspect of the environment use.
Disclosure of Invention
In order to overcome the problems of the prior art, an object of the present invention is to provide an optical lens assembly.
The invention is realized by the following technical scheme:
provided is a micro-distortion high-resolution large-field optical lens, comprising a first lens with positive optical power, a second lens with negative optical power, a third lens with negative optical power, a fourth lens with positive optical power, a fifth lens with negative optical power, a sixth lens with positive optical power, a seventh lens with positive optical power, an eighth lens with positive optical power and a ninth lens with negative optical power, which are sequentially arranged from an object side to an image side along an optical axis;
the concave surfaces of the first lens, the second lens and the third lens are in a meniscus shape, the concave surfaces face to the image side, and the second lens and the third lens have negative focal power;
the fourth lens convex surface is glued with the fifth lens concave surface and has positive focal power, the fourth lens convex surface faces towards the image side, and the fifth lens convex surface faces towards the image side;
the concave surface of the sixth lens faces the image side;
the seventh lens convex surface faces the image side;
the eighth lens convex surface is glued with the ninth lens concave surface and has positive focal power, the eighth lens convex surface faces the image side, and the ninth lens convex surface faces the image side;
a diaphragm is arranged between the fifth lens group and the sixth lens;
the optical centers of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, the eighth lens and the ninth lens are positioned on the same straight line.
Further, the ninth lens position setting satisfies:
the ninth lens position setting satisfies:
0.12＜BFL/TTL＜0.24；
wherein BFL represents a distance from a point on the convex surface of the ninth lens closest to the image side imaging surface; TTL represents the total optical length of the lens assembly.
Further, the second lens satisfies:
-14＜f(2)＜-4；
wherein f (2) represents the second lens focal length.
Further, the third lens satisfies:
f(3)＜-3；
wherein f (3) represents the third lens focal length.
Further, the first lens and the sixth lens satisfy:
1.2＜∣f(1)/f(6)∣＜2；
wherein f (1) represents the first lens focal length and f (6) represents the sixth lens focal length.
Further, the fourth lens and fifth lens position settings satisfy:
1.4＜∣f(5)/f(4)∣＜2.5；
wherein f (4) represents the fourth lens focal length and f (5) represents the fifth lens focal length.
Further, the seventh lens and eighth lens position settings satisfy:
1.8＜∣f(7)/f(8)∣＜2.5
wherein f (7) represents the seventh lens focal length and f (8) represents the eighth lens focal length.
Further, the sixth lens satisfies:
1.05＜∣R2/R1∣＜2；
wherein R1 is used to represent a radius of curvature of the first surface of the sixth lens, and R2 is used to represent a radius of curvature of the second surface of the sixth lens;
further, the eighth lens and the ninth lens after being glued satisfy:
1.05 < |R5/R3| < 2.05 and 1.3 < |D/R4| < 1.85;
wherein, R3 is used for representing the radius of curvature of the first surface of the eighth lens, R4 is used for representing the radius of curvature of the second surface of the eighth lens after being glued with the first surface of the ninth lens, R5 is used for representing the radius of curvature of the second surface of the ground lens, and D is used for representing the outer diameter of the lens of the second surface of the eighth lens.
Further, the first lens refractive index satisfies:
1.48＜nd＜1.65；
where nd is used to denote the central wavelength refractive index.
Further, the ninth lens refractive index satisfies:
nd＞1.8；
where nd is used to denote the central wavelength refractive index.
Further, the lens f-number is 2.5 and the angle of view is 95 °.
The invention has the following beneficial effects:
the invention has the beneficial effects that the structural composition of the optical lens assembly can realize miniaturization, and in addition, as each lens is a glass spherical lens, the optical lens assembly has the advantages of small optical distortion and large field of view.
Drawings
FIG. 1 is a schematic cross-sectional view of a micro-distortion high-resolution large-field optical lens according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of an MTF curve;
FIG. 3 is a schematic diagram of a color difference curve;
fig. 4 is a schematic diagram of a distortion curve.
Detailed Description
The invention is further described below in connection with the following detailed description. Wherein the drawings are for illustrative purposes only and are shown in schematic, non-physical, and not intended to be limiting of the present patent; for the purpose of better illustrating embodiments of the invention, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the size of the actual product; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
Example 1
As shown in fig. 1, a micro-distortion high-resolution large-field optical lens provided in an embodiment of the present invention includes a first lens 1 having positive optical power, a second lens 2 having negative optical power, a third lens 3 having negative optical power, a fourth lens 4 having positive optical power, a fifth lens 5 having negative optical power, a sixth lens 6 having positive optical power, a seventh lens 7 having positive optical power, an eighth lens 8 having positive optical power, and a ninth lens 9 having negative optical power, which are sequentially arranged from an object side to an image side along an optical axis;
the first lens 1 comprises a first surface 11 and a second surface 12, the first surface 11 being convex and the second surface 12 being concave;
the second lens 2 includes a first surface 21 and a second surface 22, the first surface 21 being convex and the second surface 22 being concave;
the third lens 3 includes a first surface 31 and a second surface 32, the first surface 31 being convex, the second surface 32 being concave;
the fourth lens 4 includes a first surface 41 and a second surface 42, the first surface 41 being concave, the second surface 42 being convex;
the fifth lens 5 includes a first surface 51 and a second surface 52, the first surface 51 being concave and the second surface 52 being convex;
the sixth lens 6 includes a first surface 61 and a second surface 62, the first surface 61 being convex and the second surface 62 being concave;
the seventh lens 7 comprises a first surface 71 and a second surface 72, the first surface 71 being concave and the second surface 72 being convex;
the eighth lens 8 includes a first surface 81 and a second surface 82, the first surface 81 being convex, the second surface 82 being convex;
the ninth lens 9 comprises a first surface 91 and a second surface 92, the first surface 91 being concave and the second surface 92 being convex.
The second surface 12 of the first lens 1, the second surface 22 of the second lens 2 and the second surface 32 of the third lens 3 are concave and have a meniscus shape, the second surface 12, the second surface 22 and the second surface 32 are all towards the image side, and the second lens 2 and the third lens 3 have negative optical power;
the second surface 42 of the fourth lens 4 is glued to the first surface 51 of the fifth lens 5, has positive optical power, the second surface 42 of the fourth lens 4 faces the image side, and the second surface 52 of the fifth lens 5 faces the image side;
the second surface 62 of the sixth lens 6 faces the image side;
the second surface 72 of the seventh lens 7 faces the image side;
the second surface 82 of the eighth lens 8 is glued to the first surface 91 of the ninth lens 9, has positive optical power, the second surface of the eighth lens 8 faces the image side, and the second surface 92 of the ninth lens faces the image side;
a diaphragm 10 is also arranged between the fifth lens 5 and the sixth lens 6;
the optical centers of the first lens 1, the second lens 2, the third lens 3, the fourth lens 4, the fifth lens 5, the sixth lens 6, the seventh lens 7, the eighth lens 8, and the ninth lens 9 are located on the same straight line.
Specifically, the ninth lens 9 position setting satisfies:
0.12＜BFL/TTL＜0.24；
where BFL represents the distance from the point on the second surface 92 of the ninth lens 9 closest to the image side to the imaging plane; TTL represents the total optical length of the lens assembly.
Specifically, the second lens 2 satisfies:
-14＜f(2)＜-4mm；
wherein f (2) represents the focal length of the second lens 2.
Specifically, the third lens 3 satisfies:
f(3)＜-3；
wherein f (3) represents the focal length of the third lens 3.
Specifically, the first lens 1 and the sixth lens 6 position settings satisfy:
1.2＜f(1)/f(6)＜2；
where f (1) denotes a focal length of the first lens 1, and f (6) denotes a focal length of the sixth lens 6.
Specifically, the fourth lens 4 and the fifth lens 5 satisfy:
1.4＜∣f(5)/f(4)∣＜2.5
where f (4) denotes a fourth lens 4 focal length, and f (5) denotes a fifth lens 5 focal length.
Specifically, the seventh lens 7 and the eighth lens 8 satisfy:
1.8＜∣f(7)/f(8)∣＜2.5
where f (7) denotes a focal length of the seventh lens 7, and f (8) denotes a focal length of the eighth lens 8.
Specifically, the sixth lens satisfies:
1.05＜∣R2/R1∣＜2；
wherein R1 is used to represent the radius of curvature of the first surface 61 of the sixth lens 6 and R2 is used to represent the radius of curvature of the second surface 62 of the sixth lens;
after the eighth lens is glued with the ninth lens, the following conditions are satisfied:
1.05 < |R5/R3| < 2.05 and 1.3 < |D/R4| < 1.85;
where R3 is used to represent the radius of curvature of the first surface 81 of the eighth lens 8, R4 is used to represent the radius of curvature of the second surface 82 of the eighth lens after bonding with the first surface 91 of the ninth lens, R5 is used to represent the radius of curvature of the second surface 92 of the earth lens, and D is used to represent the outer diameter of the lens of the second surface of the eighth lens 8.
Specifically, the refractive index of the first lens 1 satisfies:
1.48＜nd＜1.65；
where nd is used to denote the central wavelength refractive index.
Specifically, the refractive index of the ninth lens 9 satisfies:
nd＞1.8；
where nd is used to denote the central wavelength refractive index.
Specifically, the f-number of the optical lens assembly is 2.5, and the angle of view is 95 °.
Example 2
In this embodiment, the optical lens parameters are as follows: focal length f=4.3, field 2w=95°, F2.5F-number.
Table 1:
fig. 2 to 4 respectively show optical characteristic curves of the micro-distortion high-resolution large-field optical lens in the present embodiment, wherein:
fig. 2 is a schematic diagram of MTF curves of a micro-distorted high-resolution large-field optical lens in this embodiment, where the drawing shows the comprehensive resolution level of the optical lens, and it can be seen from the drawing that the resolution of the lens can reach a resolution level of 4K.
FIG. 3 is a schematic diagram of a distortion curve showing the absolute magnitude of distortion less than 2.5% at the field angle of view of the present example; at an undistorted level.
Fig. 4 is a schematic view of a field curve, and it can be seen that the center and the periphery of the lens are uniformly distributed.
As can be seen from the above figures 2-4, the lens is high-resolution, low-distortion and optical distortion less than 2.5%.
It is apparent that the above examples are only examples for clearly illustrating the technical solution of the present invention, and are not limiting of the embodiments of the present invention. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are to be included in the protection of the present claims.
Claims (8)
1. A micro-distortion high-resolution large-field optical lens, characterized by comprising a first lens with positive focal power, a second lens with negative focal power, a third lens with negative focal power, a fourth lens with positive focal power, a fifth lens with negative focal power, a sixth lens with positive focal power, a seventh lens with positive focal power, an eighth lens with positive focal power and a ninth lens with negative focal power which are sequentially arranged from an object side to an image side along an optical axis, wherein the number of lens sheets of the optical lens with the focal power is nine;
the concave surfaces of the first lens, the second lens and the third lens are in a meniscus shape, and the concave surfaces face to the image side;
the fourth lens convex surface and the fifth lens concave surface have positive focal power after being glued, the fourth lens convex surface faces towards the image side, and the fifth lens convex surface faces towards the image side;
the concave surface of the sixth lens faces the image side;
the seventh lens convex surface faces the image side;
the eighth lens convex surface and the ninth lens concave surface have positive focal power after being glued, the eighth lens convex surface faces towards the image side, and the ninth lens convex surface faces towards the image side;
a diaphragm is arranged between the fifth lens group and the sixth lens;
the optical centers of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, the eighth lens and the ninth lens are positioned on the same straight line;
the setting of the ninth lens satisfies:
0.12＜BFL/TTL＜0.24；
wherein BFL represents a distance from a point on the convex surface of the ninth lens closest to the image side imaging surface; TTL represents the total optical length of the lens assembly.
2. The micro-distorted high resolution large field of view optical lens of claim 1, wherein the lens assembly lens satisfies:
-14mm＜f(2)＜-4mm；
f(3)＜-3mm；
wherein f (2) represents the second lens focal length and f (3) represents the third lens focal length.
3. The micro-distorted high resolution large field optical lens according to claim 1, wherein the first lens and the sixth lens satisfy:
1.2＜∣f(1)/f(6)∣＜2；
wherein f (1) represents the first lens focal length and f (6) represents the sixth lens focal length.
4. The micro-distorted high resolution large field optical lens according to claim 1, wherein the fourth lens and fifth lens position settings satisfy:
1.4＜∣f(5)/f(4)∣＜2.5；
wherein f (4) represents the fourth lens focal length and f (5) represents the fifth lens focal length.
5. The micro-distorted high resolution large field optical lens according to claim 1, wherein the seventh lens and eighth lens satisfy:
1.8＜∣f(7)/f(8)∣＜2.5
wherein f (7) represents the seventh lens focal length and f (8) represents the eighth lens focal length.
6. The micro-distorted high resolution large field optical lens according to claim 1, wherein the sixth lens satisfies:
1.05＜∣R2/R1∣＜2；
wherein R1 is used to represent a radius of curvature of the first surface of the sixth lens, and R2 is used to represent a radius of curvature of the second surface of the sixth lens;
after the eighth lens is glued with the ninth lens, the following conditions are satisfied:
1.05 < |R5/R3| < 2.05 and 1.3 < |D/R4| < 1.85;
wherein R3 is used to represent the radius of curvature of the eighth-lens object-side surface, R4 is used to represent the radius of curvature of the eighth-lens image-side surface after being cemented with the ninth-lens object-side surface, R5 is used to represent the radius of curvature of the ninth-lens image-side surface, and D is used to represent the lens outer diameter of the eighth-lens image-side surface.
7. The micro-distorted high resolution large field optical lens according to claim 1, wherein the first lens refractive index satisfies:
1.48＜nd＜1.65；
where nd is used to denote the central wavelength refractive index.
8. The micro-distorted high resolution large field optical lens according to claim 1, wherein the lens f-number is 2.5 and the field angle is 95 °.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109164561B (en) * | 2018-11-02 | 2024-02-20 | 广东奥普特科技股份有限公司 | Machine vision lens |
| CN111198430B (en) * | 2018-11-19 | 2022-02-08 | 宁波舜宇车载光学技术有限公司 | Optical lens and imaging apparatus |
| CN109358408B (en) * | 2018-11-23 | 2024-02-13 | 广东奥普特科技股份有限公司 | Large-view-field wide-working-distance high-resolution machine vision lens |
| JP6858469B2 (en) * | 2019-01-28 | 2021-04-14 | カンタツ株式会社 | Imaging lens |
| CN109870788B (en) * | 2019-04-02 | 2024-04-19 | 浙江舜宇光学有限公司 | Image pickup lens group |
| CN111812816B (en) * | 2020-09-08 | 2020-11-27 | 常州市瑞泰光电有限公司 | Image pickup optical lens |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4690517A (en) * | 1984-10-09 | 1987-09-01 | Nippon Kogaku K. K. | Retrofocus type wide angle lens |
| CN105259645A (en) * | 2015-11-25 | 2016-01-20 | 长春乙天科技有限公司 | Large-view field distortionless scaling objective lens |
| CN107102422A (en) * | 2017-05-09 | 2017-08-29 | 东莞市宇瞳光学科技股份有限公司 | A kind of large aperture ultra-wide angle ultra high-definition zoom lens |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI522643B (en) * | 2014-06-11 | 2016-02-21 | 先進光電科技股份有限公司 | Optical image capturing system |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4690517A (en) * | 1984-10-09 | 1987-09-01 | Nippon Kogaku K. K. | Retrofocus type wide angle lens |
| CN105259645A (en) * | 2015-11-25 | 2016-01-20 | 长春乙天科技有限公司 | Large-view field distortionless scaling objective lens |
| CN107102422A (en) * | 2017-05-09 | 2017-08-29 | 东莞市宇瞳光学科技股份有限公司 | A kind of large aperture ultra-wide angle ultra high-definition zoom lens |
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