高分辨率、大面阵红外无热化光学系统设计  

Design of High-Resolution and Large-Area-Array Athermalized Infrared Optical System

作　　者：吴海清 WU Hai-qing(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》2022年第10期1-9,共9页Infrared

摘　　要：利用普通红外光学材料实现的大视场光学被动无热化系统应用于当前新型高分辨率、大面阵红外探测器时存在透镜数量多,不易实现轻量化、小型化的技术问题。为此,引入了低折射率温度系数的硫系玻璃,并设计了一种工作波段为8~12 μm、视场为40°×32.5°、F数为1.0且适配1280×1024探测器的光学被动无热化成像光学系统。设计结果表明,在-55℃~70℃的工作温度范围内,探测器特征频率42 1p/mm处的光学传递函数(Modulation Transfer Function,MTF)值均大于0.35,系统成像性能良好,能够满足实际工程应用需求。The large field-of-view optical passive astheratization system realized by using ordinary infrared optical materials has a technical problem that the number of lenses is large,and it is difficult to realize the lightweight and miniaturization when this system is applied to the current new high-resolution,large-area-array infrared detectors.To this end,a chalcogenide glass with a low temperature coefficient of refractive index is introduced,and an optical passive anthermalization imaging optical system with a working band of 8--12μm,a field-of-view of 40°×32.5°,an F-number of 1.0,and a 1280×1024detector are designed.The design results show that in the operating temperature range of-55--70℃,the modulation transfer function(MTF)values at the detector characteristic frequency of 421p/mm are all greater than 0.35.The imaging performance of the system is good,which can meet the requirements of practical engineering applications.

关 键 词：硫系玻璃 红外光学系统 无热化 大视场 

分 类 号：O439[机械工程—光学工程] TH74[理学—光学]