Wide dynamic photoelectric detection system for point source transmittance method stray light coefficient test

Abstract

The invention relates to a wide dynamic photoelectric detection system for testing the stray light coefficient of a point source transmittance method, and belongs to the field of optical performance testing of space optical instruments such as star sensors and space optical remote sensing imaging cameras. The invention solves the technical problems that the detection range of the existing detection device is not enough, and the combination of different types of photodetectors is used to produce non-linear technical problems in the test process. The wide dynamic photodetection system uses three identical wide dynamic photodetection devices to respectively detect the entrance pupil of the space optical system, the irradiance at the image plane and the background stray light, and the data acquisition computer collects the data of the photodetection devices through the RS422 interface and calculates the points Source transmittance. The invention realizes large-scale linear measurement of irradiance through three wide dynamic photoelectric detection devices, and the detection dynamic range is better than 10 9 , to meet the stray light coefficient test requirements of the point source transmittance method of space optical instruments, which is of great significance for the development of special stray light test equipment based on the point source transmittance method.

Description

technical field [0001] The invention belongs to the field of optical performance testing of space optical instruments such as star sensors and space optical remote sensing imaging cameras, and in particular relates to a wide dynamic photoelectric detection system for space optical instrument point source transmittance method stray light coefficient testing. Background technique [0002] The ability to suppress stray light of an optical system is an important indicator for evaluating the performance of an optical system. Especially for space optical instruments that perform tasks such as deep space exploration and space remote sensing, the ability to suppress stray light is directly related to the success or failure of the tasks performed. At present, the black spot method is used for stray light testing for general optical lenses, and the stray light coefficient is used for evaluation. This method is more suitable for optical lenses such as photography and photography, but f...

AI Technical Summary

Problems solved by technology

[0006] The present invention aims to solve the technical problems that the detection range of the existing detection device is not enough, and the combination of different types of photodetectors is used for non-linear technical problems in the test process, and provides a device with an extremely wide linear detection range and weak signal detection capability, which can simultaneously detect space optics. The irradiance at the entrance pupil of the instrument, the irradiance at the image plane, and the background stray light signal, and the wide dynamic photoelectric detection system for point source transmittance method stray light coefficient test with PST calculation

Images