光学学报, 2017, 37 (6): 0612001, 网络出版: 2017-06-08
空间外差干涉光谱仪信噪比研究
Study for Signal-to-Noise Ratio of Spatial Heterodyne Spectrometer
测量 空间外差干涉技术 信噪比 干涉图 傅里叶变换光谱学 measurement spatial heterodyne spectroscopy signal-to-noise interferogram Fourier transform spectrometry
摘要
以传统非成像式的高光谱空间外差干涉光谱仪为例, 详细推导了传统空间外差干涉光谱仪的空域和光谱域信噪比(SNR)的表达式, 分析了仪器各影响因素与SNR的关系, 包含空间分辨率、光谱分辨率、干涉条纹调制度和电子学噪声等, 并结合样机成像方式进行了讨论, 得出了相应的结论。结果表明, 计算SNR可有效评估和反映光谱仪的特性。
Abstract
The general expression about signal-to-noise ratio ( SNR ) in spatial domain and spectral domain of spatial heterodyne spectrometer is deduced considering the primary noise, and the relationship between SNR and instrumental characteristic parameter is analyzed, which includes spectral resolution, spatial resolution, degree of interferogram modulation, electronics noise and so on. Combined instrumental characteristic parameter with imaging methods mode, the corresponding conclusion is obtained , and the results show that SNR can efficiently evaluate and reflect the character of spectrometer.
罗海燕, 熊伟, 施海亮, 李志伟. 空间外差干涉光谱仪信噪比研究[J]. 光学学报, 2017, 37(6): 0612001. Luo Haiyan, Xiong Wei, Shi Hailiang, Li Zhiwei. Study for Signal-to-Noise Ratio of Spatial Heterodyne Spectrometer[J]. Acta Optica Sinica, 2017, 37(6): 0612001.