为满足大气CO2 吸收光谱测量的要求，基于成像光谱仪基本工作原理和光学设计理论，设计了一种近红外CO2 吸收光谱高光谱分辨率成像光谱仪。它采用简单平面反射光栅光谱仪结构，由入缝、两片聚焦透镜、平面反射光栅及两片成像透镜组成。透镜材料为普通常用光学玻璃，为减化系统结构透镜采用了二次非球面设计。采用ZEMAX 软件对近红外光谱仪的光学系统进行了优化设计与模拟分析。最终设计与模拟分析结果表明，该光学系统光谱范围为1 591～1 621 nm，分辨率<0.08 nm，F 数为1.8，满足设计要求。

In order to fulfill the observations of near Infrared (IR) CO2 absorption bands in reflected sunlight, a kind of high spectral resolution near infrared CO2absorption bands imaging spectrometer was designed based on the principle of imaging spectrometer and the theory of optical design. A simple planar reflection grating spectrometer approach consisting of an entrance slit, a two-element collimator, a planar reflection grating and a two-element camera lens was presented. Common glasses were chosen and aspheric elements with simple conics were allowed with a view to minimizing the number of optical surfaces. The optical system of the spectrometer was optimized by using ZEMAXoptical design software. The analyzed results show that the spectrometer’s spectral range is 1591-1621nm, resolution is <0.08nm, F-number is 1.8, and these all satisfy the requirements.