Analyse of pointing and tracking error with three concentric spheres optical system

According to unique tracking mode, the specific tracking program of three concentric spherical optical system which used in laser communication is discussed. By analyzing field of view and precision in the communication tracking optical path and the communication receiving optical path, the main relating parameters are given on the basis of theoretical calculation of tracking trajectory with Matlab. Using the software of Tracepro, the optical simulation of spot centroid and spot size of image plane in communication tracking optical path and the communication receiving optical path are performed after the introduction of relevant error. The simulation results show that centroid deviation of communication reception and communication tracking are in the ranges of +/- 4 mu m and +/- 50 mu m, respectively. Spot diameter deviation of communication reception and communication tracking are less than 80 mu m and 400 mu m respectively, which do not affect the relating function on tracking and communicating.