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Prime lens for realizing full-color photography under low illumination

A fixed-focus lens, full-color technology, applied in the field of fixed-focus lenses

Pending Publication Date: 2020-10-16
DONGGUAN CHANGYI PHOTOELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the current existing products obviously cannot meet the above-mentioned technical requirements for miniaturization, large wide-angle, large aperture, athermalization, etc., so further technical research and development is required.

Method used

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  • Prime lens for realizing full-color photography under low illumination
  • Prime lens for realizing full-color photography under low illumination
  • Prime lens for realizing full-color photography under low illumination

Examples

Experimental program
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Embodiment Construction

[0021] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0022] Such as figure 1 As shown, a fixed-focus lens that realizes full-color photography under low illumination, which sequentially includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, and a fifth lens L5 from the object side to the imaging surface , the sixth lens L6, the seventh lens L7 and the eighth lens L8, wherein the first lens L1, the sixth lens L6 and the seventh lens L7 are negative meniscus lenses with negative refractive power, and the second lens L2 is a biconcave negative lens. Refractive power lens, the third lens L3 is a positive meniscus positive refractive power lens, the fourth lens L4, the fifth lens L5 and the eighth lens L8 are biconvex positive refractive power lenses, the fifth lens is cemented with the sixth lens, and the fourth lens Between the lens L4 and the fifth lens L5 is a grating surface STO. A fil...

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Abstract

The invention discloses a prime lens for realizing full-color photography under low illumination. The lens sequentially comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens and an eighth lens from an object side to an imaging surface. The first lens, the sixth lens and the seventh lens are negative meniscus negative refractive power lenses.The second lens is a biconcave negative refractive power lens, the third lens is a positive meniscus positive refractive power lens, the fourth lens, the fifth lens and the eighth lens are biconvex positive refractive power lenses, the fifth lens and the sixth lens are glued, and a grating surface is arranged between the fourth lens and the fifth lens. By reasonably configuring the focal length of each lens, large wide angle, large aperture and athermalization are realized, and the lens has the advantages of environmental temperature resistance, stability and the like.

Description

technical field [0001] The invention relates to the field of lens technology, in particular to a fixed-focus lens for realizing full-color photography under low illumination. Background technique [0002] With the development of security lenses, the requirements for imaging quality are getting higher and higher while the products are further miniaturized. The quality requirements for night vision environments are becoming more and more stringent, so it is necessary to have a lens that can achieve full-color photography in low-light conditions. [0003] However, the current existing products obviously cannot meet the above-mentioned technical requirements for miniaturization, large wide-angle, large aperture, and athermalization, etc., so further technical research and development is required. Contents of the invention [0004] The technical problem to be solved by the present invention is to provide a fixed-focus lens capable of realizing full-color photography under low ...

Claims

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Application Information

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IPC IPC(8): G02B13/00G02B13/06G02B13/18
CPCG02B13/0045G02B13/006G02B13/06G02B13/18
Inventor 殷海明
Owner DONGGUAN CHANGYI PHOTOELECTRIC CO LTD