摘要
基于动态红外景象模拟技术的需求，设计了一个基于数字微镜器件的红外双波段投影光学系统：焦距150mm，相对口径1：2，全视场角为5．3°，工作波段为红外中波（3～5μm）和红外长波（8～12μm）．系统采用共轴式，由三片球面透镜和一个投影棱镜组成，使用Ge、ZnS和ZnSe三种普通红外材料．引入一个二元光学衍射面，使系统具有结构简单、重量轻、成本低等优点．设计结果表明：在截止频率17ly／mm、像距5．6mm时，光学系统的红外中波的调制传递函数接近0．7，红外长波的调制传递函数大于0．5，设计结果接近衍射极限，能够满足红外景象模拟器的总体设计要求．
According to the requirements of the dynamic infrared scene simulator technology, a projection optical system of dual-band infrared based on digital micro-mirror device was designed. The focal length of the projection system was 150 mm, the relative aperture was 1 ： 2 , the full field of view was 5.3° and the working wavelength covered the infrared middle wavelength （3-5 μm） and infrared long wavelength （8-12 μm）. The system chose coaxial type and consisted of only three pieces of spherical lens and one projection prism. Ge, ZnS and ZnSe were used in the system. This system was simple, light weigh and low cost by introducing one binary surface. The designing results show： at the cut-off frequency 17 ly/mm and the image distance 5.6 mm, the modulation transfer function of middle wavelength is close to 0.7; the modulation transfer function of long wavelength is greater than 0.5; both are close to the diffraction limited curve. The system can meets the requirements of the overall design of the infrared scene simulator.
出处
《光子学报》
EI
CAS
CSCD
北大核心
2013年第12期1519-1523,共5页
Acta Photonica Sinica
基金
总装"十二五"预研基金课题(No.5131×××103)资助
关键词
投影光学系统
红外双波段
折衍混合
共轴球面
数字微镜器件
Projection optical system
Dual-band infrared
Hybrid refractive/diffractive
Coaxial sphere
Digital micro-mirror device
