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A pinhole optical lens

An optical lens and pinhole technology, applied in the field of optical lens, can solve the problems of unfavorable filter installation and focusing, large light aperture, heavy overall weight, etc., achieve good image quality, ensure picture brightness, and overcome lens focus drift A large amount of effect

Active Publication Date: 2017-12-08
舜宇光学(中山)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, the patent document CN201464692U discloses a megapixel pinhole lens, which uses 5 glass lenses, including two sets of glued lenses. The overall weight of the lens with this structure is relatively high, and the cost is also relatively high. The intercept is only 2.33mm, which is not conducive to the installation and focusing of the filter, and the large aperture is 4.5mm

Method used

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  • A pinhole optical lens
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0049] Such as Figure 2 to Figure 5 As shown, f=4.3mm, F#=2.5, FOV=110°, BFL=5.6942, TTL=12.278, the focal length of each lens is shown in the table below:

[0050] f1

f2

f3

f4

f5

f2 / f1

f3 / f1

f4 / f5

BFL / TTL

-5.8197

15.3051

9.3

3.38

-6.027

-2.6299

-1.598

-0.5608

0.4637

[0051] Each lens surface, R value, thickness and material thereof in the first embodiment are as follows:

[0052]

[0053] Each lens surface parameter in the first embodiment is as follows:

[0054]

Embodiment approach 2

[0056] Such as Figure 6 to Figure 9 As shown, f=4.3mm, F#=2.45, FOV=105°, BFL=5.3142, TTL=11.89, the focal length of each lens is shown in the table below:

[0057] f1

f2

f3

f4

f5

f2 / f1

f3 / f1

f4 / f5

BFL / TTL

-6.2873

15.713

9.6

3.33

-5.63

-2.4992

-1.5269

-0.5915

0.4469

[0058] Each lens surface, R value, thickness and material thereof in the second embodiment are as follows:

[0059]

[0060] Each lens surface parameter in the second embodiment is as follows:

[0061]

Embodiment approach 3

[0063] Such as Figure 10 to Figure 13 As shown, f=4.3mm, F#=2.4, FOV=96°, BFL=5.842, TTL=12.41, the focal length of each lens is shown in the table below:

[0064] f1

f2

f3

f4

f5

f2 / f1

f3 / f1

f4 / f5

BFL / TTL

-5.8

15.71

9.89

3.41

-6.34

-2.7086

-1.7052

-0.5379

0.47

[0065] In the third embodiment, each lens surface, R value, thickness and material thereof are as follows:

[0066]

[0067] The parameters of each lens surface in the third embodiment are as follows:

[0068]

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Abstract

The invention discloses a pinhole optical lens, in which a first lens, a second lens, a third lens, a fourth lens and a fifth lens are arranged sequentially from the object plane to the image plane, and the structure of five lenses is adopted, which is beneficial to the lens The overall volume is minimized design, each lens adopts the combination of plastic lens and glass lens, spherical lens and aspheric lens, and optimizes the focal length and distribution of each lens, so that the resolution of the lens image of the present invention reaches one million pixels, and the aperture of the light is large. F#≤2.5mm, and can meet the requirements of 1 / 2.7 inch image height and temperature drift compensation. Therefore, the lens of the present invention has the advantages of small size, low manufacturing cost, clear picture quality and increased use environment range.

Description

【Technical field】 [0001] The invention relates to an optical lens, in particular to a pinhole optical lens. 【Background technique】 [0002] Due to its small size and easy to hide, pinhole lenses are widely used in some special monitoring situations, such as unannounced visits by reporters, investigation and evidence collection by public security organs, monitoring of bank counters or ATMs, etc. Therefore, when designing, try to make the diameter of the front port of the lens small, the total length of the lens short, and the overall weight of the lens light. For example, the patent document CN201464692U discloses a megapixel pinhole lens, which uses 5 glass lenses, including two sets of glued lenses. The overall weight of the lens with this structure is relatively high, and the cost is also relatively high. The intercept is only 2.33mm, which is not conducive to the installation and focusing of the filter, and the aperture is large at 4.5mm. [0003] The present invention ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B13/18G02B13/00G02B7/04G02B7/02
Inventor 柳晓娜梁伟朝白兴安高屹东付湘发陈鹏沈文蔡维展程智勇谢志高
Owner 舜宇光学(中山)有限公司
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