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Wide-angle lens with low distortion and high relative illumination and working method thereof

A relative illumination, wide-angle lens technology, applied in the field of wide-angle lenses, can solve the problems of uniform brightness, large distortion, and low illumination that are difficult to restore the real size of the scene, and achieve the effect of low distortion, high relative illumination, and high shooting brightness.

Active Publication Date: 2019-10-22
FUJIAN FORECAM OPTICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most wide-angle lenses on the market still have problems such as low relative illumination, large distortion, etc.
When this type of lens is used with a camera, it is difficult to restore the true size of the scene and the brightness of the imaging picture is uniform

Method used

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  • Wide-angle lens with low distortion and high relative illumination and working method thereof
  • Wide-angle lens with low distortion and high relative illumination and working method thereof
  • Wide-angle lens with low distortion and high relative illumination and working method thereof

Examples

Experimental program
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Effect test

Embodiment Construction

[0020] Such as Figure 1~5 As shown, a wide-angle lens with low distortion and high relative illuminance, the front mirror group A, the rear mirror group B and the fixed light between the front mirror group A and the rear mirror group B are arranged in sequence from left to right along the light incident direction The front mirror group A includes a first meniscus positive lens, a first meniscus negative lens, a first biconvex positive lens, a first biconcave negative lens and a second biconvex positive lens, and the rear mirror group B It includes a second meniscus positive lens, a second meniscus negative lens, a third biconvex positive lens, a fourth biconvex positive lens and a third meniscus negative lens.

[0021] In this embodiment, the first double-convex positive lens and the first double-concave negative lens form a first cemented group; the second meniscus negative lens and the third double-convex positive lens form a second cemented group; Four biconvex positive l...

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Abstract

The invention relates to a wide-angle lens with low distortion and high relative illumination. A front mirror group A, a rear mirror group B and a fixed diaphragm between the front mirror group A andthe rear mirror group B are arranged in order from the left to the right in the incident direction of light. The front mirror group A comprises a first meniscus positive lens, a first meniscus negative lens, a first double convex positive lens, a first double concave negative lens and a second double convex positive lens. The rear mirror group B comprises a second meniscus positive lens, a secondmeniscus negative lens, a third double convex positive lens, a fourth double convex positive lens and a third meniscus negative lens. The invention further relates to a working method of the wide-angle lens with low distortion and high relative illumination. The wide-angle lens provided by the invention has the advantages of reasonable structure, simple operation, low distortion and high relativeillumination.

Description

technical field [0001] The invention relates to a wide-angle lens with low distortion and high relative illuminance and its working method. Background technique [0002] Lens is an important part of security cameras. After years of development, security lenses have gradually transitioned from low-end products with multiple lenses, high assembly difficulty, and low optical indicators to economical high-level security lenses. However, most wide-angle lenses currently on the market still have problems such as low relative illumination, large distortion, and so on. When this type of lens is used with a camera, it is difficult to restore the true size of the scene and the brightness of the imaging picture is uniform. Contents of the invention [0003] In view of this, the object of the present invention is to provide a wide-angle lens with low distortion and high relative illumination and its working method, which has a reasonable structure, easy operation, and the effect of l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/00G02B13/06
CPCG02B13/0015G02B13/006G02B13/06
Inventor 林孝同肖维军江伟杨成林
Owner FUJIAN FORECAM OPTICS CO LTD
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