高分辨力成像光谱仪光谱定标研究  

Spectral Calibration for the High Spectral Resolution Imager

作　　者：葛明锋[1,2] 亓洪兴[1] 王雨曦[1,2] 周潘伟[1] 韩贵丞[1] 

机构地区：[1]中国科学院上海技术物理研究所主动光电技术重点实验室,上海200083 [2]中国科学院大学,北京100049

出　　处：《光电工程》2015年第12期14-19,共6页Opto-Electronic Engineering

基　　金：国家863高技术研究发展计划(2012AA121102)

摘　　要：高光谱分辨力是未来成像光谱仪发展的必然趋势。而传统的基于单色仪的光谱定标为了让单色仪输出足够光强,使得定标光源带宽与成像光谱仪的光谱通道带宽变得很接近,会显著影响定标精度。本文从理论上定量分析了定标光源带宽对定标精度的影响机制,提出了通过反卷积计算法和多像元合并法来修正定标光源带宽对光谱定标的影响。最后,通过不同带宽的定标光源对仪器进行光谱定标,并使用上述两种方法进行修正,得到的光谱分辨力精度均优于0.2 nm,达到了定标系统的精度,验证了方法的可行性。High spectral resolution is the inevitable trend in the future development of spectral imager. However, the traditional spectral calibration based on the monochromator in order to ensure enough output power made bandwidth of the calibration light source and spectral resolution of the spectral imager become very close, which would significantly affect the precision of the calibration. This paper quantitatively analyzed that the bandwidth of calibration light source bring the influence on the spectral calibration, and the methods of deconvolution or pixel merging was put forward to correct the calibration error. Finally, calibrated the spectral imager with different bandwidth light sources, and corrected by the before-mentioned methods. The results show that the accuracy of the spectral resolution is better than 0.2 nm, achieves the accuracy of the spectral calibration system and verifies the feasibility of the method.

关 键 词：成像光谱仪 光谱分辨力 波长定标 反卷积 

分 类 号：TH744.1[机械工程—光学工程]