Lens module for monitoring camera

Abstract

The invention discloses a lens module for a monitoring a camera, which comprises a lens and an infrared breaker arranged on the lens, wherein the lens comprises a lens cover and a lens cone, the lens cone is provided with a through hole, the inner wall of the lens cone at the rear part of the through hole is extended to form a round platform with an inner hole, and the middle of the round platform is provided with n optical lens; and the infrared breaker comprises a movable device and a driving device, the movable device comprises a main body, a movable piece and an infrared edge filter, the main body is fixed in the lens cone and is provided with a fixing hole in front of the inner hole, the movable piece is hinged with the main body and is provided with a movable hole in front of the fixing hole, the infrared edge filter is fixed on the movable hole, and the output end of the driving device is connected with the movable piece. By adopting the monitoring camera disclosed by the invention to work at night, the infrared edge filter is taken away from the fixing hole, light can directly penetrate the fixing hole, the passing rate of the light can be 100%, thus the working effect is improved, the structure of the infrared breaker is simplified due to the arrangement of a single optical filter, the cost is lowered, and the performance stability is improved.

Description

technical field [0001] The invention relates to the technology in the field of electronic monitoring equipment, in particular to a lens module used for a monitoring camera. Background technique [0002] Surveillance camera is a common electronic monitoring device, which is widely used in road traffic, banks, shopping malls, residential quarters and other areas. The working principle of the surveillance camera is roughly as follows: the scene is projected to the image sensor through the optical image generated by the optical lens in the lens On the surface, it is then converted into an electrical signal, converted into a digital image signal by A / D (analog-to-digital conversion), and then sent to a digital signal processing chip for processing, and finally generates an image that can be displayed on the display. Surveillance cameras generally work around the clock. When working during the day, the light of various wavelengths is very strong. The wavelength range of light that...

AI Technical Summary

Problems solved by technology

[0003] 1. At night, a fully transparent spectral filter must be used for focusing processing, but the current fully transparent spectral filter is limited to a luminous flux rate of 95% to 97% due to the manufacturing process, so the working effect cannot be optimal

[0004] 2. In order to realize the automatic switching of the double filter, the structure of the double filter infrared interrupter is more complicated, and there are many parts, which not only increases the cost, but also is prone to failure, and it is difficult to guarantee the stability of performance.

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