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星间激光通讯中,精跟踪起着十分重要的作用,而精密偏转镜(FSM)是精跟踪系统中最为关键的部件.基于光学矢量反射定律,推导得到了FSM的精确光学特性,这一特性为精跟踪控制系统提供了精确的理论依据.设计了基于FSM精确光学特性的精跟踪控制系统,对系统整定所用的单纯形法进行了两点重要改进,并对所设计的精跟踪系统进行了数字模拟,由此实现了对FSM的精确控制,提高了精跟踪系统的精确性;将光学衍射超分辨原理应用到星间激光通讯中.利用三区位相光瞳滤波器的超分辨性能,改变光学系统的点扩散函数,从而改变接收端焦平面上的光强分布.由此减小接收衍射光斑的大小,提高系统的光学分辨能力,从而提高精跟踪系统的精确性.
Precise tracking plays a very important role in the intersatellite laser communication, and the precision deflection mirror (FSM) is the most critical component in the precision tracking system. Based on the optical vector reflection law, the precise optical characteristics of the FSM are deduced. Which provides a precise theoretical basis for the precision tracking control system.The precision tracking control system based on the precise optical characteristics of the FSM is designed, two important improvements are made to the simplex method used in the system tuning, and the precision tracking system is designed Digital simulation to achieve the precise control of the FSM and improve the precision of the tracking system.The optical diffraction super-resolution principle is applied to the inter-satellite laser communication.Using the super-resolution performance of the three-zone phase-shift pupil filter, Optical point spread function of the optical system, so as to change the light intensity distribution on the focal plane of the receiving end, thereby reducing the size of the received diffraction spot and improving the optical resolution of the system, so as to improve the accuracy of the fine tracking system.