HD zoom surveillance camera lens for 4k cameras

Abstract

The invention relates to a high-definition varifocal monitoring pick-up lens suitable for a 4K camera. The high-definition varifocal monitoring pick-up lens comprises a lens cone, wherein a front fixed mirror group with a positive focal power, a variable-magnification mirror group with a negative focal power, a diaphragm with variable aperture, a middle fixed mirror group with the positive focal power and a compensating mirror group with the positive focal power are sequentially arranged in the lens cone in the light incidence direction; an automatic light driver for adjusting the aperture of the diaphragm is mounted on the lens cone. The lens has the advantages of large caliber, high resolution ratio, low distortion, variable focal length, broadband spectrum confocal scanning and the like; the system focal length of the lens is 11.8-40 mm; the monitoring angle is 42.5-12.5 degrees; the relative aperture D / f' is 1:1.4 in the whole journey; in the 0.8 field of view, the visible light MTF value is more than 0.3 under the condition of 200 lp / mm; the MTF value at the infrared 850 nm waveband is more than 0.25 under the condition of 200 lp / mm; the whole focal length section TV distortion is lower than 2.5%; the high-definition varifocal monitoring pick-up lens is suitable for the camera image surface which is 1 / 1.7 inch above, so as to meet the operating requirement on the 4K camera.

Description

technical field [0001] The invention relates to the fields of security, home security and home intelligence, in particular to a high-definition zoom monitoring camera lens suitable for 4K cameras. Background technique [0002] With the development of social economy and the improvement of people's living standards, the transportation network is becoming more and more busy, which puts forward higher requirements for the efficient management and control of intelligent transportation. It poses a challenge to a more superior video surveillance technology. With the introduction of the concept of "4K" (8 million pixels) ultra-high-definition camera technology, the camera needs to be equipped with a camera lens with a larger aperture, higher resolution, and infrared wide-spectrum confocal to ensure superior video surveillance quality. At present, there is no ultra-clear zoom surveillance lens on the market that can meet the requirements of all aspects and meet the requirements of 4...

AI Technical Summary

Problems solved by technology

At present, there is no ultra-clear zoom surveillance lens on the market that can take into account various requirements and meet the requirements of 4K cameras.

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