Small wide-angle high and low temperature day and night confocal lens

A high-low temperature, wide-angle technology, applied in the field of optical lenses, can solve problems such as image distortion, poor imaging quality, and low resolution, and achieve the effects of low distortion, stable working performance, and high image fidelity

Active Publication Date: 2022-02-08
JIANGXI PHENIX OPTICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, the lens of smart home security equipment generally has an aperture above 2.0, a focal length of about 2.8mm, a maximum field of view of about 140°, and a large distortion (more than 16%), resulting in obvious image distortion and large size. , low resolution, poor overall image quality

Method used

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  • Small wide-angle high and low temperature day and night confocal lens
  • Small wide-angle high and low temperature day and night confocal lens
  • Small wide-angle high and low temperature day and night confocal lens

Examples

Experimental program
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Effect test

Embodiment 1

[0057] Such as Figure 2-5 As shown, a small wide-angle high and low temperature day and night confocal lens, in this embodiment, the first lens L1 is a convex-convex negative refractive power glass spherical lens; the second lens L2 is a concave-convex positive refractive power plastic aspheric lens; the third lens L3 is a concave-convex positive power plastic aspheric lens; the fourth lens L4 is a double convex positive power glass spherical lens; the fifth lens L5 is a double concave negative power plastic aspheric lens; the sixth lens L6 is a double convex positive power High degree plastic aspheric lens. The relevant parameters of each lens are shown in Table 1:

[0058] Table 1

[0059]

[0060]

[0061] In Table 1, S1 and S2 correspond to the object side and image side of the first lens L1 respectively, S3 and S4 correspond to the object side and image side of the second lens L2 respectively, and S6 and S7 correspond to the object side and image side of the thir...

Embodiment 2

[0077] Such as Figure 6-9 As shown, a small wide-angle high and low temperature day and night confocal lens, the first lens L1 is a concave-convex negative power glass spherical lens; the second lens L2 is a concave-convex positive power plastic aspheric lens; the third lens L3 is a concave-convex positive power plastic aspheric lens; the fourth lens L4 is a double-convex positive power glass spherical lens; the fifth lens L5 is a double-concave negative power plastic aspheric lens; the sixth lens L6 is a double-convex positive power plastic aspheric lens . In the present embodiment, the relevant parameters of each lens are as shown in Table 3:

[0078] table 3

[0079] Surface serial number surface type radius of curvature thickness Refractive index Abbe number Object surface sphere infinity S1 sphere 9.1 0.6 1.69 52.6 S2 sphere 1.9 1.73 S3 Aspherical -6.3 1.33 1.64 22.3 S4 Aspherical -4.1 -0.3 ...

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Abstract

The invention discloses a small wide-angle high and low temperature day and night confocal lens, which comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and an optical filter which are sequentially arranged from an object side to an image side along an optical axis; the first lens is a convex-concave spherical lens with negative focal power; the second lens is a concave-convex aspherical lens with positive focal power; the third lens is a concave-convex aspherical lens with positive focal power; the fourth lens is a biconvex spherical lens with positive focal power; the fifth lens is a biconcave aspherical lens with negative focal power; and the sixth lens is a biconvex aspherical lens with positive focal power. The lens has a large aperture, can realize clear imaging under weak light, has a large field angle, low distortion and high image trueness, has an imaging effect of 5million pixels, meets day and night sharing requirements, and is stable in working performance, small in overall size, low in cost and wide in application range in an environment of -40 DEG C to + 70 DEG C.

Description

technical field [0001] The invention belongs to the technical field of optical lenses, in particular to a small wide-angle high-low temperature day and night confocal lens. Background technique [0002] With the development of science and technology, intelligent high-definition cameras have been widely used in various fields, which put forward higher requirements for optical lenses. At present, smart home security equipment tends to be multi-functional and multi-scenario application development. In some application scenarios with complex environments, smart home security equipment is required to have strong environmental adaptability. For example, when it is applied in a scene with a large temperature difference between high and low temperature, it is required that the security lens does not defocus in the high and low temperature environment. At the same time, smart home security equipment will work day and night, and it is necessary not only to have a clear image during t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/00G02B13/06G02B13/18G02B1/00G02B1/04
CPCG02B13/0045G02B13/06G02B13/18G02B13/008G02B1/00G02B1/041
Inventor 马宏博
Owner JIANGXI PHENIX OPTICS TECH CO LTD
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