一种折反二次成像式长波光学系统的杂散光抑制  

Suppression of stray light in a catadioptric and re-imaging LWIR system

作　　者：孟卫华[1,2] 项建胜[2] 倪国强[1] 

机构地区：[1]北京理工大学光电学院,北京100081 [2]中国空空导弹研究院航空制导武器航空科技重点实验室,河南洛阳471009

出　　处：《红外与激光工程》2013年第4期966-970,共5页Infrared and Laser Engineering

基　　金：航空科学重点基金项目(20100112002)

摘　　要：讨论了一种折反二次成像式长波红外光学系统的杂散光抑制方法,该光学系统采用R-C反射式结构和二次成像光路,用于小型低成本红外成像制导系统。利用LightTools软件仿真找出光学系统中的主要杂散光来源和传输路径,结合仿真分析结果设计出了合适的机械拦光结构。然后在LightTools中建立了光学机械结构模型针对杂散光抑制进行了迭代设计,并对杂散光抑制效果进行了仿真验证。设计的光学系统加工、装配完成后进行了太阳杂散光抑制试验,仿真和试验结果表明:太阳夹角7°以外不存在杂散光干扰,可以满足系统杂光抑制要求。Stray light suppression in a catadioptric and re-imaging LWIR system was discussed. The optical system which comprised a classical R-C reflective optics and a re-imaging refractive optics was designed for a compact and low-cost IIR seeker. The source and path of stray light in this system were investigated by simulating the optic-mechanical model with LightTools. According to the simulation, the mechanical light stops were built, and the performance of stray light suppression was analyzed. After assembled, the optical system and its anti-stray light effect were evaluated by testing the angle limit away from the sun. The results of simulation and test indicate that there is no influence of stray light on the LWIR system outside 7 from optical axis.

关 键 词：杂散光 折反系统 二次成像 长波红外 

分 类 号：TB133[机械工程—光学工程] TN216[理学—光学]