用于大气遥感探测的临边成像光谱仪

分析了大气临边成像光谱探测的原理,依据应用要求设计研制了光栅色散型紫外/可见临边成像光谱仪原理样机。该样机采用宽波段折射式消色差前置望远光学系统与改进的Czerny-Turner光谱成像系统匹配的结构形式,工作波段为540～800nm(一级光谱)和270～400nm(二级光谱),通过切换紫外、可见带通滤光片来实现两个波段分别探测,质量为8kg,体积为450mm×250mm×200mm。用该样机进行了实验室光谱实验,并对光谱分辨率进行了分析,测量了该样机的实际光谱分辨率。测量结果表明,该样机的实际光谱分辨率为1.3nm,接近其理论光谱分辨率1.12nm,满足设计指标1.4nm的要求,并具有体积小、质量轻等特点,适合空间遥感应用。

Study on limb imaging spectrometer for remote sensing of atmosphere

The principle of atmospheric sounding using a limb imaging spectrometer is analyzed. Then, a prototype of grating dispersion type UV/Visible limb imaging spectrometer is designed and manufactured for the spectral ranges of 540-800 nm (1st order) and 270-400 nm (2nd order). The prototype consists of a broad-band refractive achromatic fore telescopic optical system and a modified Czerny-Turner spectral imaging system and records images from 540-800 nm by the visible filter and 270-400 nm by the UV filter. The volume of the prototype is about 450 mm×250 mm×200 mm, and the total mass is about 8 kg. A spectral experiment is carried out with the prototype in a laboratory and the analyzed result demonstrates that the real spectral resolution of the prototype is 1.3 nm, which approaches to the theoretical spectral resolution of 1.12 nm and satisfies the technique requirement of 1.4 nm. The prototype has advantages in little mass and high precision and is suitable for spatial remote sensing.