摘要
在大视场红外光学系统中,基于普通红外光学材料实现的光学被动无热化系统存在透镜数量多且不易实现轻量化、小型化的技术问题。为解决这个问题,采用硫系玻璃与常用红外材料组合来实现光学被动无热化,并设计了一种视场为40°×32.5°、工作波段为8~12 m、F数为1.0、工作温度范围为-55℃~+70℃的小型化非制冷红外成像光学系统。设计结果表明,该系统结构简单紧凑、成像性能良好,在空间频率421p/mm处的调制传递函数(Modulation Transfer Function,MTF)值大于0.3,能够满足实际工程应用的需求。
In the infrared optical system with a large field-of-view,the optical passive athermalization system based on ordinary infrared optical materials has the technical problems of a large number of lenses,and it is difficult to achieve lightweight and miniaturization.To solve this problem,a combination of chalcogenide glass and common infrared materials is used to achieve passive optical athermalization,and a miniaturized uncooled infrared imaging optical system with a field-of-view of 40°×32.5°is designed.Its operating waveband is 8~12 m,the F number of the optical system is 1.0,and the operating temperature range is-55℃~+70℃.The design results show that the system has a simple and compact structure and good imaging performance.The modulation transfer function(MTF)value at the spatial frequency of 421p/mm is greater than 0.3,which can meet the application requirements of actual projects.
作者
吴海清
WU Hai-qing(Measurement and Control Co. , Ltd. , Luoyang 471009, China;China Airborne Missile Academy, Luoyang 471009, China)
出处
《红外》
CAS
2021年第7期1-8,共8页
Infrared
关键词
硫系玻璃
红外光学系统
无热化设计
大视场
chalcogenide glass
infrared optical system
athermalized design
large field-of-view
