宽波段DMD动态红外景象仿真器投影光学系统设计  

Projection lens design of wide band dynamic infrared scene simulator with digital micromirror device

作　　者：党东妮[1,2] 季轶群[1] 沈为民[1] 

机构地区：[1]苏州大学现代光学技术研究所,江苏苏州215006 [2]北京跟踪与通信技术研究所,北京100094

出　　处：《红外与激光工程》2012年第4期1017-1021,共5页Infrared and Laser Engineering

基　　金：高等学校博士学科点专项科研基金(2011320110016)

摘　　要：宽波段红外景象仿真器可用于内场评价和验证中波/长波红外双波段成像仪。详细介绍了基于数字微镜器件(DMD)的动态红外景象仿真器的组成和工作原理。重点介绍了覆盖中波和长波红外的宽波段红外投影光学系统的指标要求、设计思想和设计结果。基于离轴三反射镜系统设计的系统,具有无色差、适用波段宽、相对孔径大、结构较紧凑、成像质量好等优点。根据待测设备要求,设计了一款口径100、相对孔径F/2.84、全面视场角4.4°、成像质量接近于衍射极限的宽波段投影光学系统。Wide band infrared scene simulator can be used to evaluate and verify the performance of middle（MWIR） and/or long（LWIR） wavelength infrared dual-band imagers.The construction and work principle of dynamic infrared scene simulator based digital micromirror device（DMD） were introduced in detail.The required performance,design idea and result of its projection lens covering MWIR and LWIR bands were analyzed and reported.The designed optical system was based on off-axial three-mirror system and had the advantages of achromatism,wide usable band,high speed,relative compactness and good imaging quality.According to the requirement of tested instrument,a projection lens was designed,which had 3-12 μm of wide band,100 mm of entrance pupil diameter,2.84 of F-No,284 mm of effective focal length and 4.4 degrees of area full field of view,and approached its diffraction-limited performance.

关 键 词：数字微镜器件 红外 双波段 投影光学系统 离轴三反射镜系统 

分 类 号：O436[机械工程—光学工程]