Offner型成像光谱仪前置光学系统设计  

Design of fore telescope system for Offner imaging spectrometer

作　　者：闫兴涛[1,2] 杨建峰[1] 薛彬[1] 马小龙[1] 赵意意[1,2] 卜凡[1,2] 

机构地区：[1]中国科学院西安光学精密机械研究所光谱成像技术实验室,陕西西安710119 [2]中国科学院大学,北京100049

出　　处：《红外与激光工程》2013年第10期2712-2717,共6页Infrared and Laser Engineering

基　　金：国家自然科学基金(60808028);国家863计划(2009AA122203)

摘　　要：针对Offner型成像光谱仪结构特点，总结了其前置望远系统的选型及设计原则；介绍了一种大视场、长焦距、像方远心离轴三反光学系统的设计方法；利用该方法优化设计了一款焦距800 mm，视场达8.6o×0.148o，工作波段0.9~5μm的星载Offner型成像光谱仪的前置望远光学系统。对其性能分析表明，在Nyquist频率16.7 lp/mm处，各谱段的调制传递函数值均在0.65以上，接近衍射极限，完全满足成像质量要求。同时证明了该设计方法可行，所设计系统结构紧凑，较易加工，适于空间遥感用Offner型成像光谱仪。In allusion to the specific structural characters of Offner imaging spectrometer, the fundamental design principles of its fore telescope were analyzed. A novel method to design the wide FOV, long focal length and telecentric off-axis three-mirror anastigmatic （TMA） optical system was presented. For the projective demand, a fore telescope system for Offner imaging spectrometer was designed. Its focal length was 800 mm. Its FOV was 8.6oí0.148o, and the operation spectrum band was from 0.9μm to 5μm. The evaluation results of its imaging quality demonstrate that the MTF of each spectrum band is higher than 0.65 at the Nyquist frequency 16.7 lp/mm. The imaging quality has reached the diffraction-limitation, which satisfies the pre-designed requirement. Therefore, the design method is feasible. The designed telescope system is compact, easy to be fabricated and suitable for space borne Offner imaging spectrometer.

关 键 词：光学设计 成像光谱仪 推扫式 像方远心 离轴三反消像散 

分 类 号：O439[机械工程—光学工程]