中红外平面光栅光谱仪系统光学设计与优化

利用红外热电堆阵列探测器作为光接收器,以小型化且能满足一定光谱工作范围和光谱分辨率为设计指标,根据光谱仪器设计理论和像差理论,设计了一种Czerny-Turner结构中红外平面光栅光谱仪。系统采用双离轴抛物面镜作为前置光路缩减了光学系统尺寸,采用超环面聚焦镜校正了像散。运用ZEMAX设计软件对中红外平面光栅光谱仪的前置光路、色散成像系统进行设计、优化和分析。最终分析结果表明,该系统光谱工作范围为8.04~13.96 m,光谱分辨率优于80 nm,F数为2,光学结构特征尺寸约为150 mm200 mm70 mm,满足设计指标。

Optical design and optimization of a mid-infrared plane grating spectrometer system

Using the infrared thermopile array in the system as light receiver, with miniaturization and meet the requirements of certain spectral working range and spectral resolution as the system design task, according to the theory of spectrometer and the aberration, a mid-infrared plane grating spectrometer based on the structure of Czerny-Turner was designed. A double off-axis parabolic reflector was used as the fore-optical system to reduce the size of other optical elements, the toroidal focusing mirror was adopted to correct astigmatism. The ZEMAX software was applied to design, optimize and analyze the fore-optical system, imaging system of the spectrometer. Final analysis results show that the spectrometer system working range from 8.04 um to 13.96 um, spectral resolution is better than 80 nm, F number is 2, optical size of the system is 150 mm200 mm70 mm, and satisfy the design task.