摘要
基于中波红外320×240制冷型探测器设计了一套双视场红外光学系统,利用光学被动式补偿温度焦移,实现对系统的无热化设计。介绍光学系统结构参数的求解过程,用Zemax软件进行设计,并对该系统在不同温度下进行仿真以及像质评价。实验结果表明:光学系统采用二次成像结构,使用8片透镜在3.7μm～4.8μm波段实现了50mm和200mm两档变焦,满足100%冷阑匹配,在-20℃～60℃温度范围内,系统Nyquist频率处MTF值均大于0.5。
Based on a 320）K 240 middle-wave infrared cooled detector, a dual field of view infrared sys- tem was designed. Using focal shift of optical passive compensation temperature, athermalization de- sign technology was realized. The computation process to obtain structural parameters of the optical system was introduced, and then optimization was applied by using Zemax software. The optical sim- ulation and image evaluation were carried out. The experimental results indicate that the system real- ize＇the zoom of 50 mm and 200 mm at the band of 3.7μm～4.8μm by using eight lenses, and cold shield efficiency is 100%. During the temperature range of --20℃～ 60℃, value of the modulation transfer function is all above 0.5 at the Nyquist frequency.
出处
《应用光学》
CAS
CSCD
北大核心
2013年第3期385-390,共6页
Journal of Applied Optics
基金
国家973重点基础研究发展规划资助项目(2009CB72400603B)
中国科学院航空光学成像与测量重点实验室开放课题(Y2HC1SR123)
关键词
光学设计
双视场
无热化
像质评价
optical design
dual field of view
athermalization~ image evaluation
