外差探测系统中马卡望远镜离轴使用的研究  

Off-axis use of Cassegrain telescope in heterodyne detection system

作　　者：毛红敏[1] 徐静[1] 甄胜来[1] 马玉芬[1] 俞本立[1] 

机构地区：[1]安徽大学光电信息获取与控制教育部重点实验室,安徽合肥230039

出　　处：《应用光学》2008年第4期508-511,共4页Journal of Applied Optics

基　　金：安徽省优秀青年科技基金(04042045);安徽省高校青年教师科研"资助计划"基金(2005jq1027)

摘　　要：鉴于马卡望远镜离轴能够减小因副镜遮挡引起的光能量损失,分析了马卡望远镜离轴使用时,合作目标和非合作目标发射和接收光路的区别。讨论了马卡望远镜在外差探测系统离轴使用时,发射能量提高,但外差效率下降的原因;在合作目标外差探测系统离轴使用时发射能量提高30%以上,外差效率也有很大提高;通过对散射体目标物和平面镜的测量,分别得到了17%和85%的外差效率,验证了马卡望远镜在合作目标外差探测系统中可以离轴使用。The effect of off-axis use of Cassegrain telescope with different objectives on heterodyne detection probability is studied. In the non-cooperative target heterodyne detection system, when light is off-axially emitted from Cassegrain telescope, the emitted energy is increased while detection probability is declined. In cooperation target heterodyne detection system, the emitted energy is increased by 30%, detection probability is also increased greatly. The detection probabilities for the scattering object and mirror measured at laboratory are 17 % and 85% respectively. It verifies that off-axis Cassegrain telescope can be used for achieving better performance in cooperation target heterodyne detection system.

关 键 词：外差探测 马卡望远镜 离轴 外差效率 

分 类 号：TN929.1[电子电信—通信与信息系统]