谐衍射中、长波红外超光谱成像系统设计  

Design of hyper-spectral imaging system with harmonic diffraction element in medium and long infrareds

作　　者：刘英[1,2] 王学进 潘玉龙 徐长明 孙强[1] 卢振武[1] 曲锋[1,2] 

机构地区：[1]中国科学院长春光学精密机械与物理研究所,应用光学国家重点实验室,吉林长春130033； [2]中国科学院研究生院,北京100049 [3]第二炮兵工程设计研究院,北京100011

出　　处：《光学精密工程》2010年第3期579-585,共7页Optics and Precision Engineering

基　　金：国家863高技术研究发展计划资助项目(No.2007AA12Z110);国家自然科学基金资助项目(No.60507003);吉林省科技发展计划杰出青年资助项目

摘　　要：为了充分利用中波红外和长波红外的光谱信息，建立了谐衍射中、长波红外超光谱成像系统。利用谐衍射元件独特的色散特性，将谐衍射透镜应用于中、长波红外超光谱成像系统中，使系统在中波红外3．7～4．8μm和长波红外8．5～12μm的2个谐振波段内获取二百多个不同波长的图像信息。设计结果显示，在中波红外波段18lp／mm处，光学调制传递函数〉0．52；长波红外波段13lp／mm处，光学凋制传递函数〉0．51；光学系统的点斑均方根直径在中波红外波段小于279m，在长波红外波段小于34μm。得到的结果表明，光学调制传递函数在各个波长处均接近衍射极限，点斑的均方根直径完全可以与国内现有探测器的像元尺寸匹配。By making the best of the spectral information of medium and long infrareds, a harmonic diffractive/refractive optical system in middle and long infrareds is established, the hyper-spectral imaging system has obtained more than 200 spectral images in medium-wave infrared band of 3.7-4.8 μm and long-wave infrared band of 8. 5-12 μm based on the special large dispersion capability of harmonic diffractive elements. The design results show that the optical modulation transfer function is greater than 0.52 at 18 lp/mm in medium-wave infrared band; and greater than 0.51 at 13 lp/mm in long-wave infrared band. Furthermore, the RMS spot diameter is less than 27 μm in medium-wave infrared band and is less than 34 μm in long-wave infrared band. Obtained data indicate that the optical modulation transfer functions at all wavelengths are close to the diffraction limit; and the RMS diameer of points can match with the pixel size of existing detectors.

关 键 词：红外成像 超光谱成像系统 谐衍射透镜 

分 类 号：TH744.1[机械工程—光学工程] TN219[机械工程—仪器科学与技术]