Optical Design For Dynamic Star Simulator Base On LCOS

The star simulator is a kind of laboratory equipment for ground calibration of the star sensor.Along with fast developing of star sensor,higher and higher accuracy of the star simulator calibration is reqired.For the development of the core display restrict the development of star simulator,to improve the accuracy of the star simulator calibration, it is neccessary to find a kind of star map display with high resolution,high contrast and small pixel.Aiming at the requirement of high calibration accuracy about star simulator, this paper discusses a star simulator which use LCOS as core display,the LCOS with high resolution and high contrast. Introduce the structure,work principle and basic founction of the star simulator,and design optical system which of 103.877mm focal length,10°×10°field of view,0.4μm～0.76μm wavelength,36mm light pass aperture,55mm pupil distance. parallelism error≤10",distortion<0.1%.According to the index requirement choose distortionless eyepiece as initial structure,and optimize the initial structure by ZEMAX software,the structure has six sphere lens,the image quality of the optical system is good after aberrational correction. At last,analyze tolerance of the system,the result shows that this optical system meet the requierment.