Low-distortion high-resolution day and night lens

A high-resolution, lens technology, applied in installation, optics, instruments, etc., can solve the problems of large distortion of fixed-focus lenses and inability to achieve clear imaging, etc., and achieve the effects of small edge dispersion, compact structure, and low distortion

Active Publication Date: 2015-11-18
FUJIAN FORECAM OPTICS CO LTD
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  • Application Information

AI Technical Summary

Problems solved by technology

Fixed-focus lens cameras are the most used in traffic surveillance cameras. The design and manufacture of fixed-focus lenses are simpler than zoom lenses. However, the existing conventional fixed-focus lenses have relatively large distortion and cannot achieve clear imaging at a relatively short object distance.

Method used

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  • Low-distortion high-resolution day and night lens
  • Low-distortion high-resolution day and night lens

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Experimental program
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Embodiment Construction

[0017] A low-distortion high-resolution day-night lens, the optical path of the lens is an anti-telephoto optical structure; the optical system of the lens is provided with a front group A and a rear group B in sequence along the incident direction of light from front to back. Group A includes a convex-concave lens A-1, a convex-concave lens A-2 and a convex-concave lens A-3, which are arranged in sequence from front to back, and a double-concave lens A-4. B includes plano-convex lens B-1.

[0018] In this embodiment, the air gap between the front group A and the rear group B is 14.21 mm.

[0019] In this embodiment, the air gap between the convex-concave lens A-1 and the cemented group in the front group A is 14.21 mm, and the air gap between the cemented group and the double-concave lens A-4 is 1.03 mm.

[0020] All the lenses of this lens are made of high refractive index glass, which bears a large focal power, so that the wide-angle oblique light rays quickly "converge" a...

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Abstract

The invention relates to a low-distortion high-resolution day and night lens. The optical system of the lens is provided with a former group A and a latter group B which are arranged along incident direction of light rays from the front to the back in turn. The former group A comprises a gluing group formed by a convex-concave type lens A-1, a convex-concave type lens A-2 and a convex-concave type lens A-3 which are arranged from the front to the back in turn through close connection, and a double concave lens A-4. The latter group B comprises a plane convex lens B-1. The low-distortion high-resolution day and night lens is large in relative aperture so that images can be shaped more easily; resolution is high so that the low-distortion high-resolution day and night lens can be suitable for the requirement of two-million-pixel high-definition video photographing; and distortion is low so that clear imaging can be realized in a shorter object distance.

Description

technical field [0001] The invention relates to a low-distortion high-resolution day-night dual-purpose lens, which belongs to the field of optoelectronic technology. Background technique [0002] With the rapid development of smart cities, urban road monitoring projects are becoming more and more important. Expressways everywhere are "overcrowded", and the burden of vehicles on cities due to scratches and speeding is becoming increasingly serious. So, monitoring of the road shows its necessity. At the same time, there is an increasing demand for traffic surveillance cameras. Fixed-focus lens cameras are the most used in traffic surveillance cameras. The design and manufacture of fixed-focus lenses are simpler than zoom lenses. However, the existing conventional fixed-focus lenses have relatively large distortion and cannot achieve clear imaging at a relatively short object distance. . Contents of the invention [0003] In view of this, the object of the present invent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/00G02B7/02G02B1/00
Inventor 陈春花何武强刘任重陈华萍
Owner FUJIAN FORECAM OPTICS CO LTD
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