5 mega-pixel micro camera lens with large target surface

A technology of miniature camera and large target surface, applied in installation, optics, instruments, etc., to achieve the effect of compact structure, accurate precision and high resolution

Active Publication Date: 2013-11-13
FUJIAN FORECAM OPTICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the defective of existing wide-angle photographic lens, realize above-mentioned goal is the object of the present invention, promptly the technical problem to be solved in the present invention is to provide a kind of 5 million picture element big target surface miniature photographic lens

Method used

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  • 5 mega-pixel micro camera lens with large target surface
  • 5 mega-pixel micro camera lens with large target surface

Examples

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Embodiment Construction

[0015] Such as figure 1 As shown, a miniature camera lens with a large target surface of 5 million pixels, the optical path of the lens is an inverse telephoto optical structure, and the optical system is respectively provided with negative focal lengths along the incident direction of the light from left to right. The front group A, the diaphragm C, and the rear group B with positive refractive power, the front group A is sequentially provided with a negative crescent lens A-1, a biconcave lens A-2, a positive crescent lens A-3 and a biconcave lens A -4 first glued group and double-convex lens A-5 that are closely connected, and the rear group B is provided with the second glued group that is closely connected by plano-convex lens B-1 and positive crescent lens B-2, double-convex lens B-3 and formed by The third cemented group in which biconvex lens B-4 and positive crescent lens B-5 are in close contact.

[0016] In this embodiment, the second glued group and the third glue...

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Abstract

The invention relates to a 5 mega-pixel micro camera lens with a large target surface. An optical system of the lens is provided with a front assembly A with negative focal power, a diaphragm C and a rear assembly B with positive focal power in the light ray incident direction from left to right; the front assembly A is sequentially provided with a negative crescent lens A-1, a biconcave lens A-2, a first gluing group which is formed through tight connection of a positive crescent lens A-3 and a biconcave lens A-4, as well as a biconcave lens A-5; and the rear assembly B is sequentially provided with a second gluing group formed through tight connection of a plano-convex lens B-1 and a positive crescent lens B-2, a biconvex lens B-3, as well as a third gluing group formed through tight connection of a biconvex lens B-4 and a positive crescent lens B-5. The lens has the advantages of ultra-wide field, high light gathering power, high resolution and broadband spectrum confocal performance, and can provide whole-interface sharp images superior to 5 mega-pixel for a high-definition network camera system.

Description

technical field [0001] The invention relates to a video camera lens device, in particular to a miniature camera lens with a large target surface of 5 million pixels, belonging to the field of optoelectronic technology. Background technique [0002] The ultra-wide-angle camera lens of the existing structure type has been used in the field of video photography for more than 10 years, and its performance index is not high, especially in terms of image clarity, it can only be compatible with standard-definition CCD or CMOS cameras with 200,000 to 300,000 pixels. It has a narrow spectral range and is limited to use under daylight conditions of 480nm~650nm. [0003] With the continuous emergence of mega-pixel high-resolution CCD and CMOS image sensors, photoelectric video surveillance has entered the era of networking; the performance of video camera systems has changed from purely "watching" the external scene in the past to "recognition and recognition" today. cognition"; from ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/06G02B13/14G02B7/02G02B27/00
Inventor 冯世华林华屈立辉刘任重
Owner FUJIAN FORECAM OPTICS CO LTD
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