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Large aperture lens

A lens and aperture technology, applied in the field of optical lenses, can solve the problems of poor day and night confocal performance in peripheral dark corners, poor day and night confocal performance, and insufficient pixels, and achieve aberration optimization, spherical aberration optimization, and clear imaging images Effect

Pending Publication Date: 2018-12-11
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

[0002] Most of the fixed-focus surveillance lenses currently on the market have disadvantages such as low resolution, small aperture, and poor day and night confocal performance.
With the development of science and technology, the demand for optical lenses with high pixels, large aperture and good near-infrared confocal performance is becoming more and more urgent in the market. Vignettes or day and night confocal performance is not good enough and other shortcomings are difficult to meet people's needs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0080] figure 1 It schematically shows the structural layout of the large aperture lens according to the first embodiment of the present invention.

[0081] According to the data given in Embodiment 1 in Table 1, the focal length of the large aperture lens of this embodiment is f=4.8mm, F#=1.6, and FOV=102°.

[0082] The focal length / focal length relationship between each lens or lens to realize the above-mentioned parameters of the large aperture lens in this embodiment is as follows:

[0083] f1

f4

f5

f6

f7

f1 / f5

f4 / f6

f4 / f7

-7.48

5.08

-10.46

5.57

-7.83

0.71

0.91

-0.64

[0084] Table 2

[0085] In this embodiment, the parameters such as the radius of curvature, thickness, and material of each lens surface are as follows in Table 3:

[0086]

[0087]

[0088] table 3

[0089] In this embodiment, the aspherical data are shown in Table 4 below:

[0090] surface

A

B

C

D

E

F

...

Embodiment approach 2

[0098] Figure 6 It schematically shows the structural layout of the large aperture lens according to the second embodiment of the present invention.

[0099]According to the data given in Embodiment 2 in Table 1, the focal length of the large aperture lens in this embodiment is f=5.2mm, F#=1.8, and FOV=100°.

[0100] Realize the focal length / focal length relationship between each lens of the above-mentioned parameter large aperture lens in this embodiment or between the lenses as shown in Table 5:

[0101] f1

f4

f5

f6

f7

f1 / f5

f4 / f6

f4 / f7

-8.27

5.05

-10.68

5.37

-7.34

0.77

0.94

-0.68

[0102] table 5

[0103] In this embodiment, the parameters such as the radius of curvature, thickness, and material of each lens surface are as follows in Table 6:

[0104] surface

surface type

radius of curvature

thickness

Material

Effective caliber

Conic coefficient

S1

Aspherical

4...

Embodiment approach 3

[0115] Figure 11 It schematically shows the structural layout of the large aperture lens according to the third embodiment of the present invention.

[0116] According to the data given in Embodiment 3 in Table 1, the focal length of the large aperture lens in this embodiment is f=6.4mm, F#=1.7, and FOV=103°.

[0117] The focal length / focal length relationship between each lens or lens to realize the above-mentioned parameters of the large aperture lens in this embodiment is as follows:

[0118] f1

f4

f5

f6

f7

f1 / f5

f4 / f6

f4 / f7

-8.79

5.06

-11.45

5.76

-8.35

0.76

0.88

-0.61

[0119] Table 8

[0120] In this embodiment, the parameters such as the radius of curvature, thickness, and material of each lens surface are as follows in Table 9:

[0121] surface

surface type

radius of curvature

thickness

Material

Effective caliber

Conic coefficient

S1

Aspherical

5.46

1.21...

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Abstract

The invention relates to a large aperture lens. The large aperture lens comprises: seven lenses arranged in order from the object side to the image side along an optical axis, respectively: a first lens (1), a second lens (2), a third lens (3) a fourth lens (4), a fifth lens (5), a sixth lens (6) and a seventh lens (7), and also includes a diaphragm (S), wherein the diaphragm (S) is located between the second lens (2) and the third lens (3); the first lens (1) and the seventh lens (7) are negative power lenses; the second lens (2) and the sixth lens (6) are positive power lenses; the third lens (3) is a plastic aspherical lens; and the fourth lens (4) and the fifth lens (5) constitute a glued lens group. The large aperture lens has high pixel, and can be used at day and night.

Description

technical field [0001] The invention relates to an optical lens, in particular to a day and night lens with a large aperture and high pixels. Background technique [0002] Most of the fixed-focus surveillance lenses currently on the market have disadvantages such as low resolution, small aperture, and poor day and night confocal performance. With the development of science and technology, the demand for optical lenses with high pixels, large aperture and good near-infrared confocal performance is becoming more and more urgent in the market. Defects such as vignetting or insufficient day and night confocal performance have been difficult to meet people's needs. Contents of the invention [0003] An object of the present invention is to solve the above problems and provide a high-pixel, day-and-night lens with a large aperture. [0004] In order to achieve the purpose of the above invention, the present invention provides a lens with a large aperture, comprising: seven len...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/18G02B13/14
CPCG02B13/0045G02B13/146G02B13/18
Inventor 白兴安张圆董文飞梁伟朝翟林燕
Owner 舜宇光学(中山)有限公司
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