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Optical lens

An optical lens and lens technology, applied in the field of optical lenses, can solve the problems of inability to meet the camera equipment, complex lens structure, poor optical performance, etc., and achieve the effects of good cold processing process performance, low cost, and high mass production yield.

Active Publication Date: 2018-07-06
ZHEJIANG DAHUA TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] An optical lens provided by an embodiment of the present invention is used to solve the problem that the existing lens structure is complex, the resolution is low, the optical performance is poor, and it cannot meet the needs of imaging equipment with higher imaging requirements

Method used

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Experimental program
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Effect test

Embodiment 1

[0072] Table I

[0073]

[0074] Among them, the effective focal length of the optical system provided in Table 1 is 11.216mm, the clear aperture is F / 1.65, and the total length of the optical system is 30.3mm. In Table 1, mirror numbers 1 and 2 represent the two mirror surfaces of lens 1 along the incident direction of light, mirror numbers 3 and 4 represent the two mirror surfaces of lens 2 along the incident direction of light, and mirror numbers 5 and 6 represent lens 3 The two mirrors along the incident direction of the light, the mirror numbers 7 and 8 represent the two mirrors of the lens 4 along the incident direction of the light, the mirror number 9 represents the mirror surface of the lens 5 facing the object side, and the mirror number 10 represents the distance between the lens 5 and the lens 6 The cemented surface, mirror number 11 represents the mirror surface of lens 6 facing the image side, mirror number 12 represents the mirror surface of lens 7 facing the...

Embodiment 2

[0086] Table II

[0087]

[0088] Among them, the effective focal length of the optical system provided in Table 1 is 11.245mm, the clear aperture is F / 1.65, and the total length of the optical system is 30.25mm. In Table 2, mirror numbers 1 and 2 represent the two mirror surfaces of lens 1 along the incident direction of light, mirror numbers 3 and 4 represent the two mirror surfaces of lens 2 along the incident direction of light, and mirror numbers 5 and 6 represent lens 3 The two mirror surfaces along the incident direction of the light, the mirror serial numbers 7 and 8 represent the two mirror surfaces of the lens 4 along the incident direction of the light, the mirror serial number 9 represents the mirror surface of the lens 5 towards the object side, and the mirror serial number 10 represents the mirror surface of the lens 5 and the lens 6 The glued surface, mirror number 11 represents the mirror surface of lens 6 facing the image side, mirror number 12 represents t...

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Abstract

The invention discloses an optical lens. The optical lens is distributed by adopting reasonable focal power and has a specific structure shape; the ten million level pixel grade resolution can be reached under a relatively compact framework. Besides, for the framework is simple, the optical lens of the embodiment has low cost. By adopting the structure shape of the optical lens system provided bythe invention, abbe coefficients and other parameters of an optical glass material are well matched with the imaging condition, thus the spherical aberration, coma, astigmatism, field curvature, chromatic difference of magnification, and chromatism of position of the lens system are well corrected; the uniform imaging of the whole pixel face is guaranteed while the dual-purpose function in daytimeand nighttime is also realized; the optical lens meets the using requirement of a 4K camera and is compact structure and small in outside dimension; besides, all optical lenses adopt spherical surface design, the cold processing technical performance of the lens is good; the glass material and the finished product lens are low in cost, massive in output, and high in yield; the optical lens can bewidely applied to the security defense monitoring field.

Description

technical field [0001] The invention relates to the technical field of optical imaging, in particular to an optical lens. Background technique [0002] With the development of the security monitoring industry, 1080P high-definition video has become the mainstream, but the goal pursued by the security monitoring lens is always to improve image clarity and image quality, and 4K technology came into being; in recent years, data transmission technology, data The technological innovation and breakthrough of storage technology, image processing technology and high-definition TV display technology have made it possible to realize ultra-high-definition video surveillance with 4K resolution, and it will become the future development trend, which requires the lens (lens system) to have Higher resolution to meet the imaging requirements of 4K cameras. [0003] At present, the resolution level of existing lenses in visible light mode can only meet the needs of cameras with less than 5 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/00
CPCG02B13/005G02B13/006
Inventor 林法官胡长涛刘凯
Owner ZHEJIANG DAHUA TECH CO LTD
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