Day and night surveillance camera

A lens and dual-purpose technology, applied in optical components, optics, instruments, etc., can solve the problems of small field of view, visible light and near-infrared light focal plane drift, poor imaging quality, etc., to reduce chromatic aberration and stray light, improve Imaging effect, effect of reducing processing cost

Pending Publication Date: 2018-10-12
JIANGXI LIANCHUANG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a day and night dual-purpose monitoring lens, aiming to solve the problems of small field of view, poor imaging quality and focal plane drift of visible light and near-infrared light existing in the existing day and night dual-purpose monitoring lens

Method used

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  • Day and night surveillance camera

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0102] Please refer to Table 1, which shows the relevant parameters of each lens of the day and night dual-purpose monitoring lens provided by Embodiment 1 of the present invention, wherein the thickness of the visible light and infrared light 850nm filter group G1 is 0.3 mm, and the thickness of the cover glass G2 is 0.4 mm. mm.

[0103] Table 1

[0104]

[0105]

[0106] Please refer to Table 2, which shows the spherical parameters of each aspheric lens of the day and night surveillance lens provided by Embodiment 1 of the present invention.

[0107] Table 2

[0108] Surface serial number

[0109] see Figure 2a , Figure 2b and image 3 , shows the curves of field curvature, distortion and on-axis spherical aberration chromatic aberration of the day and night dual-purpose monitoring lens provided by Embodiment 1 of the present invention. It can be seen from the figure that the field curvature, distortion and on-axis spherical aberration chromatic aberrat...

Embodiment 2

[0111] Please refer to Table 3, which shows the relevant parameters of each lens of the day and night monitoring lens provided by Embodiment 2 of the present invention.

[0112] table 3

[0113]

[0114] Please refer to Table 4, which shows the spherical parameters of each aspheric lens of the day and night surveillance lens provided by Embodiment 2 of the present invention.

[0115] Table 4

[0116] Surface serial number

[0117] see Figure 5a , Figure 5b and Image 6 , shows the field curvature, distortion and on-axis penalty spherical aberration chromatic aberration curves of the day and night dual-purpose monitoring lens provided by the second embodiment of the present invention. It can be seen from the figure that the field curvature, distortion and on-axis spherical aberration chromatic aberration are all is well corrected. like Figure 7 Shown is the MTF curve in the visible light band of the day and night surveillance lens provided by the second em...

Embodiment 3

[0119] Please refer to Table 5, which shows the relevant parameters of each lens of the day and night monitoring lens provided by Embodiment 3 of the present invention.

[0120] table 5

[0121]

[0122] Please refer to Table 6, which shows the spherical parameters of each aspheric lens of the day and night surveillance lens provided by Embodiment 3 of the present invention.

[0123] Table 6

[0124] Surface serial number

K

B

C

D

E

F

S3

-4.68E+01

-3.45E-02

7.94E-03

-3.03E-03

7.20E-04

-2.96E-05

S4

-2.07E+00

-2.43E-03

2.58E-04

1.18E-03

1.86E-04

-2.26E-05

S8

-3.79E+00

-6.81E-02

3.59E-02

-1.62E-02

3.88E-03

-3.19E-04

S9

-7.99E+00

-7.42E-03

9.39E-03

-4.44E-03

8.41E-04

-5.39E-05

S10

-8.15E+00

-6.05E-03

7.45E-03

-2.32E-03

4.13E-04

-4.30E-05

S11

-1.33E+00

2.78E-03

1.73E-04

3.53E-04

1.07E-04

-2.56E-05

[0125]...

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PUM

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Abstract

The invention relates to the technical field of optical imaging, and provides a day and night surveillance camera. The camera comprises a first crescent-moon-shaped lens, a second crescent-moon-shapedlens, a diaphragm, a third crescent-moon-shaped lens, a fourth lens, a fifth lens and an optical filter set; the first crescent-moon-shaped lens has negative power, and the concave surface faces an imaging plane; the second crescent-moon-shaped lens has negative power, and the convex surface faces the imaging plane; the third crescent-moon-shaped lens has negative power, and the two sides are convex surfaces; the fourth crescent-moon-shaped lens has negative power, and the two sides are concave surfaces; the fifth crescent-moon-shaped lens has negative power, and the two sides are convex surfaces; the optical filter set comprises a visible light optical filter and an infrared optical filter, the first lens and the third lens are glass spherical lenses, and the second lens, the fourth lensand the fifth lens are all plastic aspheric lenses. According to the day and night surveillance camera, special glass and plastic mixed structure design is adopted, and the camera has the advantagesof being large in field angle, good in imaging quality and capable of achieving visible light and near-infrared light confocal drift.

Description

technical field [0001] The invention relates to the technical field of optical imaging, and in particular provides a day and night monitoring lens. Background technique [0002] The access control system is an important part of the security monitoring system. In recent years, with the development of biometric technology and camera technology, the access control system has developed by leaps and bounds. Fingerprint access control systems, iris access control systems, and facial recognition access control systems have emerged. . At present, day and night monitoring cameras are widely used in access control monitoring systems because of their large field of view and long depth of field. [0003] At present, the day and night dual-use surveillance cameras on the market generally have defects such as large size, small target area, high cost, and non-day and night use. Therefore, there is an urgent need to solve the above-mentioned problems existing in the existing day and night...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/00G02B13/18
CPCG02B13/0045G02B13/18
Inventor 李伟娜韩建高博曾吉勇
Owner JIANGXI LIANCHUANG ELECTRONICS CO LTD
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