Design of Projection Optical System for Dynamic Star Simulator

In order to improve the simulation accuracy of the dynamic star simulator for the infinite sky to meet the needs of the ground function detection of the star sensor, a design scheme of the collimation optical system of the dynamic star simulator with long pupil and large field of view is proposed in this paper. The technical parameters of the star simulator are determined according to the ground test indexes of the star sensor, and the parameters of the collimating optical system are calculated accordingly. Taking the complex double Gaussian structure as the initial structure, the optical design and optimization are carried out with the help of code V software, focusing on the constraint control of system distortion and field curvature. The final design results are as follows: the field of view of the collimating optical system is 20 °, the focal length is 34.3mm, the exit pupil distance is 150mm, the full field distortion is less than 0.05566%, and the modulation transfer function MTF is close to the diffraction limit. Tolerance analysis shows that the system has excellent imaging quality, reliable engineering stability, and can realize high-precision simulation of the infinite sky.