A Super-Long Exit Pupil Distance Multi-Star Simulator for Thermal Vacuum Testing

Abstract

The invention discloses a super-long exit pupil distance multi-star simulator for thermal vacuum testing, which comprises a diaphragm, an optical collimation module, and a star point plate arranged coaxially along the incident direction of light, and is the star point The board provides a light source for illumination, and a control system for controlling the light source; wherein, the optical alignment module includes lens one, lens two, lens three, lens four, lens five, lens six, lens seven, lens eight, lens nine, and Lens ten. The invention is placed outside the thermal vacuum tank, and can perform attitude calibration on the star sensor in the thermal vacuum test.

Description

technical field [0001] The invention relates to the field of photoelectric equipment environmental tests, in particular to a super-long exit pupil distance multi-satellite simulator for thermal vacuum testing. Background technique [0002] During the operation of the star sensor in orbit, it will be affected by heat sources such as the radiation of the sun and the earth, its own thermal power consumption and the heat conduction of the satellite load, resulting in uneven heating of the optical-mechanical structure and thermal stress, resulting in changes in the surface shape, thickness and radius of curvature of the optical components. Huge changes, the image quality will decline, and in severe cases, the function of the star sensor will fail. Therefore, the thermal vacuum test is a key means to ensure the reliability of the star sensor. [0003] The star simulator is the benchmark for thermal vacuum testing of star sensors. At present, two methods are mainly used, as follow...

AI Technical Summary

Problems solved by technology

[0003] The star simulator is the benchmark for star sensor thermal vacuum testing. At present, two methods are mainly used, as follows: 1. At present, the exit pupil distance of multi-star simulator is relatively short, so it can only be placed in a thermal vacuum tank to directly test the star sensor. , but changes in ambient temperature and air pressure will also lead to a decrease in the performance of the simulator, and its magnitude cannot be assessed. This method reduces the accuracy of the test; The defect of method 1 can be avoided outside the tank, but it can only evaluate its single star point detection ability, and the star sensor cannot determine the attitude, so the real performance test cannot be obtained

Neither of the above two methods can fully evaluate the thermal vacuum performance of the star sensor

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