Lian Yu-Sheng, Liao Ning-Fang, Lü Hang, Wu Wen-Min, Dong Zhi-Gang
Guang Pu Xue Yu Guang Pu Fen Xi. 2014 Nov;34(11):3136-40.
In the premise of fulfilling the application requirement, the adjustment of spectral resolution can improve efficiency of data acquisition, data processing and data saving. So, by adjusting the spectral resolution, the performance of spectrometer can be improved, and its application range can be extended. To avoid the problems of the fixed spectral resolution of classical Fourier transform spectrometer, a novel type of spatial modulation Fourier transform spectrometer with adjustable spectral resolution is proposed in this paper. The principle of the novel spectrometer and its interferometer is described. The general expressions of the optical path difference and the lateral shear are induced by a ray tracing procedure. The equivalent model of the novel interferometer is analyzed. Meanwhile, the principle of the adjustment of spectral resolution is analyzed. The result shows that the novel spectrometer has the merits of adjustable spectral resolution, high stability, easy assemblage and adjustment etc. This theoretical study will provide the theoretical basis for the design of the spectrometer with adjustable spectral resolution and expand the application range of Fourier transform spectrometer.
在满足应用需求的前提下，光谱分辨率的调整可以提高数据采集、数据处理和数据存储的效率。因此，通过调整光谱分辨率，可以提高光谱仪的性能，并扩展其应用范围。为了避免传统傅里叶变换光谱仪固定光谱分辨率的问题，本文提出了一种新型的具有可调光谱分辨率的空间调制傅里叶变换光谱仪。描述了新型光谱仪及其干涉仪的原理。通过光线追迹过程推导了光程差和横向剪切的一般表达式。分析了新型干涉仪的等效模型。同时，分析了光谱分辨率调整的原理。结果表明，新型光谱仪具有光谱分辨率可调、稳定性高、易于组装和调整等优点。该理论研究将为可调光谱分辨率光谱仪的设计提供理论依据，并扩展傅里叶变换光谱仪的应用范围。
