A day and night dual-purpose wide-angle surveillance lens

A wide-angle, lens technology, used in optics, instruments, optical components, etc., to achieve the effect of good resolution quality, reduced lens cost, and improved product competitiveness

Active Publication Date: 2018-01-19
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

[0003] The purpose of the present invention is to overcome the deficiencies in the prior art, and provide a simple structure, which can effectively ensure day and night dual-use megapixel analysis, solve the problem of thermal drift, thereby effectively reducing production costs. Use a wide-angle surveillance lens

Method used

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  • A day and night dual-purpose wide-angle surveillance lens
  • A day and night dual-purpose wide-angle surveillance lens
  • A day and night dual-purpose wide-angle surveillance lens

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] When the radius of curvature of the twelve surfaces of the six lens lenses of the present invention, the thickness of the lens, and the focal length of each lens respectively meet the following conditions, f=1.1mm, F#=2.2, and FOV=155°.

[0058] Table 1

[0059] f2

F3

f4

f5

f6

f2 / f3

f4 / f5

f4 / f6

-4.32

7.13

2.32

-2.4

2.732

-0.606

-0.9667

0.8492

[0060] Table 2

[0061]

R value

thickness

Material

S1

13.175

0.3

1.62，60.3

S2

1.67

0.508

S3

4.69

0.3

1.53，55.7

S4

1.51

0.9582

S5

-10.31

1.669

1.64，22.4

S6

-3.39

1

ST

infinity

0.295

S7

2.22

0.839

1.53，55.7

S8

-2.48

0.05

S9

-8.57

0.3

1.64，22.4

S10

1.93

0.114

S11

3.11

1.03

1.49，81.6

S12

-2.15

1.6

S13

infinity

0.4

1.52，64.2

S14...

Embodiment 2

[0070] When the radii of curvature of the twelve surfaces of the six lens lenses of the present invention, the thickness of the lens, and the focal length of each lens respectively meet the following conditions, f=1.09mm, F#=2.2, and FOV=155°.

[0071] Table 4

[0072] f2

f3

f4

f5

f6

f2 / f3

f4 / f5

f4 / f6

-4.32

8.62

2.32

-2.54

2.85

-0.501

-0.9134

0.814

[0073] table 5

[0074]

R value

thickness

Material

S1

13.175

0.3

1.62，60.3

S2

1.67

0.508

S3

4.69

0.3

1.53，55.7

S4

1.51

0.9582

S5

-5.8923

1.669

1.64，22.4

S6

-3.1906

1

ST

infinity

0.295

S7

2.22

0.839

1.53，55.7

S8

-2.48

0.05

S9

-10.87

0.3

1.64，22.4

S10

1.97

0.114

S11

3.03

1.03

1.49，81.6

S12

-2.39

1.6

S13

infinity

0.4

1.52，64.2

...

Embodiment 3

[0082] When the radii of curvature of the twelve surfaces of the six lens lenses of the present invention, the thickness of the lens, and the focal length of each lens respectively meet the following conditions, f=1.02mm, F#=2.2, and FOV=155°.

[0083] Table 7

[0084] f2

f3

f4

f5

f6

f2 / f3

f4 / f5

f4 / f6

-4.32

6.44

2.32

-2.32

2.5

-0.671

-1

0.928

[0085] Table 8

[0086]

R value

thickness

Material

S1

13.175

0.3

1.62，60.3

S2

1.67

0.508

S3

4.69

0.3

1.53，55.7

S4

1.51

0.9582

S5

-5.8405

1.669

1.64，22.4

S6

-2.7117

1

ST

infinity

0.295

S7

2.22

0.839

1.53，55.7

S8

-2.48

0.05

S9

-2.9441

0.3

1.64，22.4

S10

3.22231

0.114

S11

3.0557

0.7103

1.49，81.6

S12

-1.9503

1.5368

S13

infinity

0.4

1.52，64.2...

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PUM

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Abstract

The invention discloses a day-night dual-purpose wide-angle monitoring lens which is provided with a first lens with negative focal distance, a second lens with negative focal distance, a third lens with positive focal distance, a diaphragm element arranged behind the third lens, a fourth lens with positive focal distance, a fifth lens with negative focal distance and a sixth lens with positive focal distance which are arranged from the side towards an object in sequence. The day-night dual-purpose wide-angle monitoring lens is characterized in that f2 / f3 is greater than -0.672 and less than or equal to -0.501; f4 / f5 is greater than or equal to -1 and less than -0.91; f4 / f6 is greater than 0.81 and less than 0.93; f2 is the focal distance of the second lens; f3 is the focal distance of the third lens; f4 is the focal distance of the fourth lens; f5 is the focal distance of the fifth lens; f6 is the focal distance of the sixth lens. To overcome defects in the prior art, the day-night dual-purpose wide-angle monitoring lens which is simple in structure, solves the thermal drift problem on the basis of effectively ensuring day-night dual-purpose megapixel analysis, so that the production cost is effectively reduced.

Description

technical field [0001] The invention relates to a day and night dual-purpose wide-angle monitoring lens. Background technique [0002] Wide-angle surveillance lenses mostly use all-glass lenses, such as patents CN202433590U and CN102778745B, which use 6 pieces of glass lenses, and the cost of the lens is relatively high. With the development of technology, mold manufacturers have made technological breakthroughs, and the price of plastic lenses is relatively low. , optical manufacturers have begun to use plastic aspheric lenses instead of glass lenses one after another to improve the competitiveness of the lens, but the side effect of using plastic aspheric lenses is the focus drift caused by the large thermal expansion coefficient. The wide-angle surveillance lens can't guarantee the day and night dual-purpose megapixel analysis, and solves the problem of thermal drift. Therefore, the existing wide-angle surveillance lens needs to be further improved. Contents of the inve...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B13/06G02B13/14G02B13/18G02B1/04
CPCG02B1/041G02B13/06G02B13/14G02B13/18
Inventor 白兴安付湘发柳晓娜高屹东梁伟朝郭小勇胡铎张家超黄春喜胡敏
Owner 舜宇光学(中山)有限公司
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