空间外差光谱仪系统设计

围绕空间外差光谱仪系统参数设计进行了理论分析和实验研究。介绍了空间外差光谱仪系统的基本结构和原理,并针对其光学系统设计,详述了系统的主要指标:光谱分辨率极限、分辨能力、光谱范围与关键光学器件:光栅、探测器、成像系统等参数的匹配关系。给出了一个完整的系统参数设计实例,并根据光学系统参数对干涉图进行了理论仿真。以搭台的方式建立空间外差光谱仪原理试验装置,并进行了典型光谱实验验证,系统检测结果表明光谱分辨能力在591 nm达到了17 700,光谱范围为574~591 nm。实验结果与仿真结果比较还表明,系统的光谱范围、光谱分辨率等指标达到了设计要求,验证了设计方法的可行性。

System design of spatial heterodyne spectrometer

This paper analyses and studies the parameter design of a Spatial Heterodyne Spectrometer(SHS).The basic concept and structure of SHS is described and the dependence of resolution limit,power of resolution and spectral range on some critical parameters of optical components including grating parameters,pixels of detector,image lens and so on is introduced.By taking an integrated system design for example,the simulated result is presented.SHS system built and tested in the laboratory,the basic concepts and performance characteristics of the technique have been verified.Experimental results show that the achieved resolving power of the SHS system is 17 700 at 591 nm,and the spectral range is 574~591 nm.These results are coincident with the theoretical results well.