Rotation switching method and device of multiple optical filters of imaging sensor

Abstract

The invention relates to rotation switching method and device of multiple optical filters of an imaging sensor. The device comprises a machine body, a rotation switching mechanism of optical filters, a photoelectric position sensor, a transmission mechanism, multiple optical filters fixed on the rotation switching mechanism of the optical filters and position notches arranged at the edges of the optical filters, wherein a light sensing window is arranged on the machine body, the rotation switching mechanism of the optical filters is arranged on the machine body, the optical filters fixed on the rotation switching mechanism of the optical filters correspond to the light sensing window, and the photoelectric position sensor corresponds to the position notches. The transmission mechanism drives the rotation switching mechanism of the optical filters to rotate, and the optical filters fixed on the rotation switching mechanism of the optical filters are rotated onto the light sensing window.

Description

technical field [0001] The invention relates to a method and device for rotating and switching multiple optical filters of an imaging sensor with a position sensor and accurate switching process. The invention can be applied to video cameras, DVs, digital cameras and other equipment. Background technique [0002] Since the imaging sensor can sense various invisible light in natural light, different filters are used in different places. Sometimes it is necessary to switch multiple filters to meet the requirements of use. For example, a band-pass filter of 380nm to 650nm should be used during the day and at night. 200nm~1000nm, for license plate, for fog penetration, for laser lighting, etc. [0003] Existing optical filter switching devices are generally divided into two types: motor-driven and electromagnetic-driven. But all adopt linear moving type reciprocating switching. Only two filters can be switched. [0004] The existing linear-moving reciprocating switching swi...

AI Technical Summary

Problems solved by technology

Bring serious consequences - the filter used day and night is reversed or not in place, this driving conversion method is called blind drive

And the driving circuit is complicated, and the commutation current needs to be given, and it is often not in place, so it cannot be used in the security industry with high reliability requirements.

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