Method and device for detecting light leakage of space optical remote sensor of reflective system

Abstract

The invention relates to a method and device for detecting light leakage of a space optical remote sensor of a reflective system. According to the invention, normal imaging light and leakage light areeffectively distinguished through shielding a reflecting area of an arbitrary reflecting mirror in the optical path, an integrating sphere is translated inside / outside the field of view of a remote sensor to be detected to simulate variations of a light source inside / outside the field of view of the optical remote sensor, the influence condition of the light source is determined through testing the output response of the remote sensor to be detected so as to judge whether the remote sensor to be detected has a light leakage phenomenon or not, and the light leakage angle is calculated, therebyproviding a measurement basis for improving the design of a parasitic light eliminating diaphragm, and ensuring the on-orbit imaging quality of the space optical remote sensor.

Description

technical field [0001] The invention belongs to the technical field of aerospace optical remote sensing, and relates to a method and a device for detecting light leakage inside / outside the field of view of a reflective system space optical remote sensor. Background technique [0002] The reflective system generally refers to the optical system that relies on the mirror reflection of light by each reflector. According to whether the optical axes of each reflector coincide, it can be divided into a reflective coaxial system and a reflective off-axis system. [0003] Stray light is the general term for all abnormally transmitted light in the optical system, which is caused by light leakage, residual reflection of optical surfaces, residual reflection of non-optical surfaces such as the inner wall of remote sensor structural parts, and optical surface quality problems. Light Leakage Stray light refers to the situation where part of the light does not enter the optical system dir...

AI Technical Summary

Problems solved by technology

When the light leakage intensity of the remote sensor to be detected is not large, the imaging output response caused by the light leakage will be submerged by the response DN value of the normal imaging light imaging output, and the DN value does not change significantly, which is easy to misjudge

[0010] At the same time, due to the mixture of light leakage and normal imaging light in the field of view, it is very difficult to set the criterion for directly judging the increase of the DN value of the image, so the existing methods cannot effectively detect light leakage in the field of view

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