第22卷第2期 2014年2月
文章编号
1004-924X(2014)02-026608
光学精密工程
Optics and Precision Engineering
消谱线弯曲长波红外成像光谱仪设计
同昊1.2
张晓龙1.2，刘英1*，孙强"，李淳"，周
（1.中国科学院长春光学精密机械与物理研究所，吉林长春130033：
2.中国科学院大学，北京130049）
Vol.22
No.2 Feb.2014
摘要：为了实现遥感目标的长波红外高光谱成像，有效消除平面光栅产生的谱线弯曲，设计了离轴透镜消谱线弯曲长波并基于此设计了消谱线弯曲的初始结构。通过优化设计得到的光学系统的通光孔径为100mm，F数为2，光谱分辨率为 20nm，空间分辨率为150μrad，冷光闹效率为100%，成像质量接近稍射极限，系统谱线弯曲由原有的180μm以上变为 14.3um以内。该项设计获得了具有普适性的消谱线弯曲公式，证明了离轴透镜具备校正谱线弯曲的特殊功能。最后的设计结果表明，在满足系统成像质量要求且不增加系统复杂度的前提下，采用离轴透镜的平面光栅光谱仪的系统谱线弯曲小于探测器像元尺寸的1/2，满足使用要求。
关键词：光学设计；成像光谱仅；红外光谱仅；谱线弯面；平面光栅；离轴透镜
中图分类号：TH744.1
文献标识码：A
doi;10. 3788/OPE, 20142202. 0266
Design of long-waveinfrared imagingspectrometer
with eliminating spectral curvature
ZHANG Xiao-longl-, LIU Ying'*, SUN Qiang',LI Chun', ZHOU Haol-2
(l.Changchun Institute of Optics,Fine Mechanics and Physics, Chinese Academy of Sciences,Changchun130033,China;
2.University of ChineseAcademy of Sciences,Beijing130049,China)
*Correspondingauthor，E-mail;liuy613@163.com
Abstract: To achieve the long-wave infrared hyperspectral imaging for remote sensing targets and to e-liminate the spectral curvature of a plane grating effectively, a long-wave infrared imaging spectrome ter with an off-axis lens was designed. The spectral curvatures from the plane grating and a single off-axis lens were caleulated, respectively, and the relationships between spectral curvatures and relative parameters were analyzed, then an initial structure for eliminating spectral curvature was designed. The optical system optimized shows an aperture of 100 mm, F number of 2, spectral resolution of 20 nm, spatial resolution of 150 μrad, and a cold aperture efficiency of 100% . Moreover, its image qual-ity is close to the diffraction limit and the spectral curvature of system changes from more than 180 μm to less than 14. 3 μm. The design obtains a universal eliminating spectral curvature formula, and
收稿日期：2013-04-11；修订日期：2013-05-28
基金项目：吉林省与中国科学院合作长吉图开发开放先导区科技创新合作专项资金资助项目(No.2011CJT0004)；
吉林省科技厅资助项目（No.20106015，20100310)；吉林省科技发展计划资助项目（No20090557）