机载中波红外两档变焦光学系统  

Airborne mid-wavelength infrared switch-zoom optical system

作　　者：孙明超[1] 熊文卓[1] 刘剑[1] 

机构地区：[1]中国科学院航空光学成像与测量重点实验室 中国科学院长春光学精密机械与物理研究所,长春130033

出　　处：《仪器仪表学报》2013年第S1期36-39,共4页Chinese Journal of Scientific Instrument

基　　金：中国科学院航空光学成像与测量重点实验室基金(2012MS02)资助

摘　　要：针对中波红外320×240制冷型探测器,设计了一套双视场红外光学系统,并利用机电主动补偿法补偿温度焦移,实现系统的无热化设计。该系统采用轴向移动式变焦,通过轴向移动变倍组实现视场切换。并对设计结果进行了像质评价。设计与分析结果表明:在3.7-4.8μm波段,该系统实现了50-200mm两档变焦,且满足100%冷阑匹配,在-50°~60°度温度范围内,系统Nyquist频率处MTF值均大于0.5。该系统具有高像质、结构简单和无热化等特点。For a cool 320×240 detector with staring focal plane array, an dual field of view infrared system for middle wavelength is designed. The system using positive electromechanical athermalization technology employs the axial motion of a lens group along the optical axis to change fields. The optical simulation and image evaluation are listed. The design results prove that the system had eight lens and worked at 3.7~4.8μm has achieved the zoom of 50mm and 200mm,and satisfy 100% cold shield efficiency. The modulation transfer function is all above 0.5 at the Nyquist frequency when the temperature is between-50°and 60°. The system is characterized by excellent images, simple structure and athermalization

关 键 词：光学设计 双视场 无热化 像质评价 

分 类 号：V248.1[航空宇航科学与技术—飞行器设计]