甚高精度星模拟器设计

摘要

研制了一套星间角距精度优于0.2″的甚高精度星模拟器系统对深空光学导航敏感器进行地面标定和精度测试.采用高精度大口径静态可变目标标准源作为甚高精度星模拟器的核心显示器件模拟星图,同时研制了一种单点可控星图模拟矩阵式LED照明系统为其提供光源,并设计了长焦距大视场投影光学系统使模拟星图成平行光出射,在光学系统出瞳处产生星图,从而完成小天体全视场甚高精度星图的模拟.最后,提出甚高精度星光出射精度的检验方法,理论分析其测量精度为0.14″.结果表明该模拟器可用于对光学导航敏感器的地面标定和精度测试.%A very high accuracy star simulator system with the simulation accuracy less than 0. 2"was developed to implement the ground calibration and accuracy testing for an Optical Sensor of Autonomous Navigation (OSAN). The simulator utilizes a high-precision and large size star array target to simulate a star map on the focal plane, and takes a luminescence controllable LED array as the illumination system of the target. Furthermore,it uses a long focal length and large FOV collimator as the projection optical system to control the star map on the target to be alterable and to project from the collimator exit pupil in parallel. Finally, the very high accuracy star map is simulated successfully. A testing method of light projection accuracy is proposed, by which the accuracy level of theory analysis is better than 0. 14". Obtained result indicates that the star simulator can satisfy the requirements of ground calibration and accuracy testing of the OSAN.