The laser beam propagation characteristic of Cassegrain optical antenna is analyzed theoretically.Several important factors (includes antenna gain factor,angle factor,distance factor,obscuration ratio,etc.)affecting the quality of laser beam in space optical communication have been researched in detail.This provides a theoretical basis for practical research on light-transfer characteristic of optical antenna in atmospheric laser communication system and has important practical value.%对卡塞格伦光学天线光传输特性进行了理论分析,重点研究了影响光学天线光传输质量的几个重要因素,并进行了测试结果与仿真验证。为实际研究大气激光通信系统中光学天线的光传输特性提供了理论依据,具有重要的实用价值。
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