防辐射长波红外连续变焦光学系统设计  

Design of Radiation-Proof Long-Wave Infrared Continuous Zoom Optical System

作　　者：吴海清 谈大伟[1,2] WU Hai-qing;TAN Da-wei(CAMA(Luoyang)Measurement and Control Co.,Ltd.,Luoyang 471009,China;China Airborne Missile Academy,Luoyang 471009,China)

机构地区：[1]凯迈(洛阳)测控有限公司,河南洛阳471009 [2]中国空空导弹研究院,河南洛阳471009

出　　处：《红外》2023年第2期1-7,共7页Infrared

基　　金：深圳市科技计划项目(KQTD20190929173954826);国家自然科学基金项目(U1930116;U206720039;12004331)。

摘　　要：为解决在强辐射环境中使用红外热像仪时由辐射导致其性能退化迅速的技术问题,基于机械正组补偿式连续变焦结构形式,通过在后固定组中引入反射镜来形成折转式光学系统,避免后端探测器直面前方辐射射线。设计了一种工作波段为8~12μm、F数为1.2、焦距为25~90 mm的非制冷红外连续变焦光学系统。结果表明,该系统结构合理、成像良好,在探测器对应的特征频率421p/mm处的调制传递函数(Modulation Transfer Function,MTF)值大于0.2,满足应用需求。加工装调后,经实际成像测试,验证了设计的准确性。In order to solve the technical problem of rapid performance degradation caused by radiation when using an infrared thermal imager in a high-radiation environment,based on the mechanical positive group compensation continuous zoom structure,the reflector is introduced into the rear fixed group to form a folding optical system,to avoid the back-end detector from the front radiation rays.An uncooled infrared continuous zoom optical system with an operating waveband of 8-12μm,a F-number of 1.2,and a focal length of 25-90 mm is designed.The results show that the system has a reasonable structure and good imaging.The modulation transfer function(MTF)value at the characteristic frequency of 421p/mm corresponding to the detector is greater than 0.2,which meets the application requirements.After processing and adjustment,the accuracy of the design is verified by actual imaging test.

关 键 词：防辐射 非制冷红外 连续变焦系统 光学设计 

分 类 号：O439[机械工程—光学工程] TH74[理学—光学]