利用口径150mm、视场±0.17°、接收波长974 nm的光学天线望远系统原理样机，搭建了试验装置并进行了实测，测量结果显示光学天线在0.35°附近及1°附近出现了两个原路回波杂光峰值.通过对两个杂光峰值的仿真分析，提出了在主镜内部增加二次斜光阑及临时挡光环的措施，消除望远系统前向散射杂光.通过分析主次镜焦距分配对光学天线望远系统杂光的影响，指出在设计中缩小主镜焦距可降低系统原路回波杂光，这对光学天线消回波杂光设计具有指导意义.

针对推扫式红外遥感成像技术在高分辨对地观测领域的重要地位, 结合我国红外遥感技术发展现状和长线阵红外探测器技术水平, 研究了利用线面转换的异型红外光纤传像束线阵端实现推扫, 面阵端与成熟的小面阵红外探测器耦合以获得高分辨红外遥感图像的光纤传像系统.分析了该红外光纤传像系统前置物镜和耦接镜设计中的主要问题, 并针对一种入射端为4 000×6元线阵, 出射端为160×150元面阵的红外光纤传像束设计了前置物镜系统和后继耦接镜系统.引入平均传递函数的方法对整体光学系统的MTF进行了模拟评价, 模拟结果显示整体光学系统成像良好, 两系统的成像性能皆达到衍射极限, 满足光纤传像系统的特殊要求, 可为该类光纤传像系统的设计提供参考.

To ameliorate the disadvantages of imaging system coupled with imaging fiber bundle, a method by adding square aperture microlens arrays at both entrance and exit ends of the imaging fiber bundle is proposed to increase the system’s coupling efficiency. The expressions for solving the parameters of both ends’ microlens units are deducted particularly. The microlens arrays used for an infrared imaging fiber bundle with the single fiber diameter of 100 μm and core diameter of 70 μm are designed by this method. The simulation results show that compared with the system without microlens arrays, the fill factor of the imaging fiber bundle coupled microlens arrays system is increased from 44.4% to more than 90%, and the coupling efficiency is doubled too. So the design method is correct, and the introduction of microlens arrays into imaging fiber bundle coupled system is feasible and superior.