光栅光谱仪的光谱重建  

Spectrum restoration of filter-grating infrared spectrometer

作　　者：张濛[1] 王忠杰[1] 岑剡[1] 

机构地区：[1]复旦大学物理学系,上海200433

出　　处：《物理实验》2017年第5期50-54,共5页Physics Experimentation

摘　　要：用光栅光谱仪进行光谱测量,不同的入射缝、出射缝宽度导致测量得到的光谱不同,狭缝宽度越大,测得的光谱越不准确.为了消除入射缝、出射缝的影响,需要对测量光谱进行数学处理以获得尽可能真实的光谱,这就是光谱重建.本文通过光谱与入射缝、出射缝的关系,用实验测得的谱线,通过出射缝还原、入射缝还原,直接恢复重建真实光谱.In spectrum measurement with filter-grating infrared spectrometer, the resolution of a received spectrum was greatly affected by the width of the entrance slit and the exit slit. Generally, large slit width would degrade the spectrum. To remove the influence of the entrance slit and the exit slit, some mathematical methods were adopted to process the received spectrum to restore the original spectrum. In this work, using the mathematical relations between the spectrum, incident slit and exit slit, the influence of the slits were removed, and the original spectrum was restored from the received spectrum directly.

关 键 词：光栅光谱仪 狭缝宽度 光谱重建 

分 类 号：O433[机械工程—光学工程]