光电工程, 2015, 42 (12): 0014, 网络出版: 2016-01-20
高分辨力成像光谱仪光谱定标研究
Spectral Calibration for the High Spectral Resolution Imager
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。
Abstract
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.
葛明锋, 亓洪兴, 王雨曦, 周潘伟, 韩贵丞. 高分辨力成像光谱仪光谱定标研究[J]. 光电工程, 2015, 42(12): 0014. GE Mingfeng, QI Hongxing, WANG Yuxi, ZHOU Panwei, HAN Guicheng. Spectral Calibration for the High Spectral Resolution Imager[J]. Opto-Electronic Engineering, 2015, 42(12): 0014.