A wide-angle lens with low distortion and high relative illuminance and its working method

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

Active Publication Date: 2021-08-10
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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  • A wide-angle lens with low distortion and high relative illuminance and its working method
  • A wide-angle lens with low distortion and high relative illuminance and its working method
  • A wide-angle lens with low distortion and high relative illuminance and its working method

Examples

Experimental program
Comparison scheme
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 illuminance. A front mirror group A, a rear mirror group B, and a fixed light between the front mirror group A and the rear mirror group B are sequentially arranged 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 Comprising 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; the present invention also relates to a wide-angle lens with low distortion and high relative illuminance working method. The invention has reasonable structure, simple and convenient operation, and has the effects of low distortion and high relative illuminance.

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 Patents(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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