用于大气临边探测的高光谱成像仪研制 -学兔兔 www.xuetutu.com.pdf

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第33卷第5期
仪
仪表学报
Vol 33 No
2012年5月
Chinese Journal of Scientific Instrumen
Mav.2012
用于大气临边探测的高光谱成像仪研制
薛庆生,林冠宇,陈伟
(中国科学院长春光学精密机械与物理研究所长春130033)
摘要:用于大气临边探测的高光谱成像仪是一种探测大气痕量气体的新型空间光学遥感仪器。分析了利用高光谱成像仪进
行大气临边探测的原理,设计并研制了一台紫外/可见高光谱成像仪原理样机,该样机光学系统由前置望远系统和改进的
zemy- Turner光谐成像系统组成,工作谱段为280~390nm和560~780nm,通过转轮切换紫外、可见滤光片分別探测这2个波
段。高光谱成像仪原理样机质量为15kg,体积500mx350mmx200mm。对该样机的性能进行了检测并测量了低压汞灯的
光谱。性能检测结果表明,空间分辨力为0.44mrad,光谱分辨力为1.3rn,均满足设计指标要求。该样机结构紧湊、质量小,在
空间大气痕量气体探测领域有广泛的应用前景。
关键词:高光谱成像仪;光学设计;原理样机;空间分辨力;光谱分辨力
中图分类号:TH744.1文献标识码:A国家标准学科分类代码:420.20
Development of hyperspectral imager for atmospheric limb sounding
Xue Qingsheng, Lin Guanyu, Chen Wei
Changchun Institute of ptics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China
Abstract: Hyperspectral imager for atmospherical limb sounding is an important new spaceborne optical remote sens
ing instrument for detecting trace components. The principle of atmospheric limb sounding with hyperspectral imager
is analyzed. A prototype of UV/visible hyperspectral imager was designed and developed. The optical system of the
prototype is composed of a fore telescope optical system and a modified Czemny-tumner spectral imaging system. The
working spectral range of the hyperspectral imager is 280 390 nm and 560-780 nm. Through switching the UV,
visible filters, the designed hyperspectral imager can detect the images in 280-390 nm and 560.780 nm, respec
tively. The total mass of the prototype is about 10 kg, and the dimension is 500 mm 250 mm x 200 mm. The per-
formances of the prototype were tested and the spectrum of a low-pressure mercury lamp was measured. The test re-
sult demonstrates that the spatial resolution of the prototype is 0.44 mrad, and the spectral resolution is 1.3 nm
Both spatial and spectral resolutions meel the design requirements. The prototype features compact structure and light
mass, and has extensive application prospect in the field of atmospheric trace gas detectio
Key words hyperspectral imager; optical design; prototype; spatial resolution; spectral resolution
大尺度、长时间污染物时空分布特征和变化趋势,进而研
1引言
究大气化学变化对全球气候和生物地球化学循环的影
响。基于卫星平台进行大气痕量气体探测已成为监测大
大气污染是全球环境变化的焦点,传统监测大气污气环境的重要手段。基于卫星平台进行大气痕量气体
染技术已经越来越不能满足科学研究和国家决策的需探测有天底、临边、掩星(掩日/月)3种探测方式。天底
求,基于卫星平台的大气痕量气体探测可以得到高烦次、探测方式的垂直分辦率不能满足大气上下层相互作用及
收稿日期:2010-12
Date:2010-12
*基金项目:国家自然科学基金(4105014)资助项目