Design of High Precision Dynamic Star Emulator by Two-beam Combination Method

In order to improve the simulation accuracy of the precision dynamic star emulator to the infinite sky to meet the needs of the ground calibration of the star sensor and meet the different needs of the design of the high-precision dynamic star emulator, a method for designing the initial structure of the high-precision dynamic star emulator is proposed. Firstly, the technical specifications of the star emulator are obtained by combining the requirements of the ground test of the star sensor, and then the design parameters of the projection optical system are calculated. According to the technical specifications, the light group 1 and the light group 2 are designed, and then the two light groups are combined into a new light group as the required. As the initial structure, the design optimization is carried out through the CODE V software, and the distortion of the system is mainly controlled. The final design result is: the field of view is 22 °, the focal length is 37.34 mm, the pupil distance is 40 mm, the distortion in the full field of view is less than 0.05%, and the MTF is close to the diffraction limit.