Ultra-wide-angle high resolution day and night dual-purpose camera lens

Abstract

The invention relates to an ultra-wide-angle high resolution day and night dual-purpose camera lens which is characterized in that a front group (A) with negative focal power and a rear group (B) with positive focal power are respectively arranged along the incident direction from left to right of an optical path, the front group (A) comprises a negative meniscus lens (A-1) and a negative meniscus lens (A-2), the rear group (B) comprises a biconvex lens (B-1), a biconvex lens (B-2) and a cemented group with close connection of a biconvex lens (B-3) and a negative meniscus lens (A-4), and an optical stop (C) is positioned between the biconvex lens (B-1) and the biconvex lens (B-2). The ultra-wide-angle high resolution day and night dual-purpose camera lens has ultra-wide-angle, strong light power, high resolution and wide spectral confocal performance, and can provide a full-interface clear image better than 2 million pixels for a high-resolution network camera system and realize 24-hour continuous monitoring and no shift of an image focus during day-night switching.

Description

technical field [0001] The invention belongs to the field of photoelectric technology and relates to a video camera lens device. Background technique [0002] like figure 2 The structural type of super wide-angle camera lens has been used in the field of video camera for more than 10 years, and its performance index is not high, especially in terms of image clarity, it can only be adapted to standard-definition CCD or CMOS cameras with 200,000 to 300,000 pixels. It can only meet the needs of "seeing" in the monitoring field, and the spectral range is narrow, limited to use under daylight conditions of 480nm to 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 monitoring under daylight conditio...

AI Technical Summary

Problems solved by technology

[0004] In order to adapt to the above-mentioned development trend, it is very important to improve the performance of the image information collection tool—the camera lens, but the existing wide-angle lens has insufficient technical performance, which restricts the improvement of the performance of the camera system

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