光学学报, 2015, 35 (9): 0911001, 网络出版: 2015-08-27
空间调制干涉型和衍射光栅型成像光谱仪信噪比性能的分析比较
Analysis and Comparison of Signal-to-Noise Ratio of Spatially Modulated Interference and Diffraction Grating Imaging Spectrometers
成像系统 成像光谱仪 信噪比 空间调制干涉仪 干涉型 衍射光栅 imaging systems imaging spectrometer signal-to-noise ratio spatially- modulated interferometer interference diffraction grating
摘要
以Sagnac 空间调制干涉型成像光谱仪和Offner凸面光栅衍射型成像光谱仪为例,着重分析和比较这两类成像光谱仪的信噪比性能.在相同观测条件下,通过推导这两类成像光谱仪所得到的图像像元的光谱辐亮度,指出空间调制干涉型成像光谱仪并不具有高通量和多路复用优势,信噪比也低于衍射光栅成像光谱仪.而且随着光谱谱段数的增加,即光谱分辨率的提高,衍射光栅成像光谱仪的信噪比优势更明显.
Abstract
Sagnac spatially-modulated interference imaging spectrometer and Offner convex diffraction grating imaging spectrometer are focused on,and their signal- to- noise performance is seriously analyzed.Through derivation of the spectral radiance of their acquired image pixels under same observation condition,it is shown that spatially-modulated interference imaging spectrometer no longer has high throughput and multiplex advantages so that its signal-to-noise is lower than diffraction grating imaging spectrometer.Further,the latter’s signal-tonoise ratio advantage becomes more significant as the increase of spectral band number.
靳阳明, 王岩, 赵知诚, 陈新华, 宋文宝, 沈为民. 空间调制干涉型和衍射光栅型成像光谱仪信噪比性能的分析比较[J]. 光学学报, 2015, 35(9): 0911001. Jin Yangming, Wang Yan, Zhao Zhicheng, Chen Xinhua, Song Wenbao, Shen Weimin. Analysis and Comparison of Signal-to-Noise Ratio of Spatially Modulated Interference and Diffraction Grating Imaging Spectrometers[J]. Acta Optica Sinica, 2015, 35(9): 0911001.
PDF全文
