临边成像光谱仪是一种对大气遥感探测有重要研究和应用价值的新型空间光学遥感仪器。从大气临边成像光谱探测的原理出发,设计并研制了光栅色散紫外/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型式,其中,前置望远光学系统为像方远心,光谱成像系统为物方远心。工作波段为540-780 nm(一级衍射光谱)和270-390 nm(二级衍射光谱),通过切换可见、紫外带通滤光片来实现两个波段分别探测,质量为8 kg,体积为450 mm×250 mm×200 mm。实验检测结果表明,该样机的空间分辨率为0.45 mrad,光谱分辨率为1.3 nm,均满足设计指标要求,并且具有体积小、质量小等特点,适合空间遥感应用。

Limb imaging spectrometer is an important new remote sensor for research and application of atmospheric remote sensing. The principle of atmospheric sounding using limb imaging spectrometer is analyzed. The prototype of grating dispersion type UV/visible limb imaging spectrometer is designed and manufactured. It consists of a broad-band refractive achromatic fore telescope optical system and a modified Czerny-Turner spectral imaging system. The fore telescope system is telecentric in image space and the spectral imaging system is telecentric in object space. It works over the spectral range of 540-780 nm (1st order) and 270-390 nm (2nd order). It records images from 540-780 nm when the visible filter in place,and 270-390 nm when the UV filter in place. The volume of the prototype is about 450 mm×250 mm×200 mm,and the total mass is about 8 kg. The test result demonstrates that the spatial resolution is 0.45 mrad and the spectral resolution of the prototype is 1.3 nm. Both spatial and spectral resolution satisfy the design requirement. The volume of the prototype is small and the mass is light,so it is suitable for spatial remote sensing.