基于长波红外探测器的消热差轻量化光学系统设计  

Design of athermal and lightweight optical system based on long-wave infrared detector

作　　者：王小波 王曦 刘广康 夏树策 付明亮 郝新建 曹乾坤 WANG Xiaobo;WANG Xi;LIU Guangkang;XIA Shuce;FU Mingliang;HAO Xinjian;CAO Qiankun(Henan Pingyuan Optics Electronics Co.Ltd.,Jiaozuo 454001,China)

机构地区：[1]河南平原光电有限公司,河南焦作454001

出　　处：《应用光学》2021年第3期429-435,共7页Journal of Applied Optics

基　　金：国防科技创新小组增强微光瞄准镜(远距型)项目(20-163-00-kx-001-003-02)。

摘　　要：利用硫系玻璃与二元衍射面设计一款基于12μm非制冷长波红外探测器(1024×768 pixel)的红外消热差系统。该系统由3片玻璃构成,焦距为75 mm,F数为1,系统总长97 mm,系统总质量203 g。利用ZEMAX进行仿真分析,仿真结果表明:在−40℃~50℃温度范围内,系统奈奎斯特频率(42 lp/mm)处的MTF均大于0.37,接近衍射极限;在−70℃~70℃温度状态下系统奈奎斯特频率(42 lp/mm)处的MTF也可以满足使用要求。该系统具有相对孔径大,全视场像质优良,结构轻量化,工艺性良好等特点。Using chalcogenide glass and binary diffraction surface,an infrared athermalization system based on the uncooled long-wave infrared detector(1024×768 pixel)was designed.The system was composed of 3 pieces of glass,and the system had a focal length of 75 mm,an F−number of 1,a total length of 97 mm,and a total weight of 203 g.The simulation analysis using ZEMAX shows that,within a temperature range of−40℃~50℃,the modulation transfer function(MTF)value at the Nyquist frequency(42 lp/mm)of the system is greater than 0.37,which is close to the diffraction limit;between−70℃and 70℃,the MTF at the system Nyquist frequency(42 lp/mm)under temperature can also meet the requirements.The system has the characteristics of large relative aperture,excellent full-field image quality,lightweight structure,and good manufacturability.

关 键 词：长波红外系统 轻量化结构 硫系玻璃 二元衍射面 消热差 

分 类 号：TN216[电子电信—物理电子学] TH703[机械工程—仪器科学与技术]