【摘要】 针对高空间分辨率、高光谱分辨率和大幅宽成像的遥感应用需求,提出了高分辨率超大幅宽星载成像光谱仪技术方案,分析确定了成像光谱仪光学系统指标,设计了空间成像光学系统和光谱成像光学系统。空间成像光学系统采用自由曲面离轴三反设计方案,实现了大视场、大相对孔径像方远心设计,系统相对畸变小于0.02%;光谱成像光学系统的狭缝长度超过90mm,采用新型离轴透镜补偿型Offner设计方案,实现了长狭缝高保真光谱成像设计,谱线弯曲和色畸变均小于1/10像元尺寸。设计结果表明,高分辨率超大幅宽星载成像光谱仪光学系统简单紧凑,成像品质接近系统衍射极限,满足星载高光谱对地成像的数据应用要求。更多还原

【Abstract】 In order to meet the requirements of remote sensing applications with high spatial resolution,hyperspectral resolution and super swatch,a new scheme of the space imaging spectrometer with high resolution and super swatch is put forward.The spatial resolution and swatch are 50 m and 150 km respectively,and the hyperspectral resolution can be better than 5 nm between 0.4μm and 1.0μm.The comprehensive performance has reached the international advanced level.The index parameters are optimized based on SNR and the modulation transfer function.Then the space imaging optical system and the spectrum imaging optical system are designed according to the optical desigh parameters.The free-form surface is adopted for the off-axis mirror to realize telecentric design of wide field of view and large relative aperture.The relative distortion is lower than 0.02%.The slit length is over 90 mm in the spectrum imaging optical system.And the new oftener configuration with off-axis correction lens is put forward to realize high fidelity design.The keystone and smile can be both controlled within 1/10 pixel.The optical system of the space imaging spectrometer with high resolution and super-swatch has so favorable imaging quality and compact volume,which can satisfy the demand of remote sensing application.更多还原