双波段昼夜大视场光学系统设计与实现

Design of Dual Band Optical Circadian Wide-Field Imaging System

针对多层次伪装手段及不同波段下目标的不同细节的情况,结合可见光和中红外两个波段的特点,设计了可见光和中波红外大视场光学系统.采用共口径形式,可同时接收两个波段的信息,对红外系统在-40^+60℃选用光学被动式消热差.研究结果表明:在视场均为92°下,可见光传递函数在空间频率100lp·mm-1处高于0.35,中波红外传递函数在空间频率20lp·mm-1处达到0.47.整个系统组合体积小,可实现昼夜全天候工作.

For the cases of different multi？layered camouflage methods and details of different target bands,an wide field optical system of visible light and mid？infrared is designed,concerning the characteristics of the two bands.Using the common caliber form,the optical system can receive the information of two bandsand at the same time .The optical passive athermalization is used in infrared system between -40 ℃ and 60 ℃.The reserch results show：While the field of view is 92°,The MTF value is above 0.35 for visible light at the spatial frequency of 100lp·mm^-1,and the MTF value is close to 0.47 for Mid-IR at the spatial frequency of 20 lp·mm^-1 .The whole system has the advantage of compact structure,and can work day and night in all-weather .