Test equipment design of high precision star sensor

Considering the practical problem that existing equipment can not complete the mission of high precision simulating stars'position and illumination uniformity of star points in the test of high precision star sensor, a type of high precision dynamic star simulator was designed. To ensure the accuracy of the projected stars, a method of LCOS optical splicing was presented. Optimization principles and image quality evaluations of the collimating optical system with large field of view were give in detail. In order to meet the lighting conditions and illumination uniformity, an illuminating optical system using fly eye lens was designed. By determining mechanical structure of the five dimensional high-resolution adjustment frame and establishing three-dimensional model of design results with CATIA, displacement resolution was achieved to 18 nm, angle resolution was achieved to 0.05. Through experimental tests, it is found that the micro-adjustment mechanism is stability, the illumination inhomogeneity is better than 10% and angular distance accuracy is less than 12. The designed simulator can approach the test requirement of high precision star sensor.