Offner型成像光谱仪前置光学系统设计 |
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引用本文: | 闫兴涛,杨建峰,薛彬,马小龙,赵意意,卜凡. Offner型成像光谱仪前置光学系统设计[J]. 红外与激光工程, 2013, 42(10): 2712-2717 |
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作者姓名: | 闫兴涛 杨建峰 薛彬 马小龙 赵意意 卜凡 |
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作者单位: | 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; |
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基金项目: | 国家自然科学基金(60808028);国家863计划(2009AA122203) |
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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8.60.148,工作波段0.9~5 m 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。
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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 |
收稿时间: | 2013-02-04 |
Design of fore telescope system for Offner imaging spectrometer |
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Affiliation: | 1.The Spectral Imaging Technique Laboratory,Xi'an Institute of Optics and Precision Mechanics,Chinese Academy of Sciences,Xi'an 710119,China;2.University of Chinese Academy of Sciences,Beijing 100049,China |
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Abstract: | 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 8.60.148, and the operation spectrum band was from 0.9 m to 5 m. 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. |
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