Trauger J T, Roesler F L
Appl Opt. 1972 Sep 1;11(9):1964-9. doi: 10.1364/AO.11.001964.
The Doppler shift of light from a rapidly rotating or rapidly flowing source limits the spectroscopic resolution with which it can be studied using Fabry-Perot spectrometers that have the usual axial fringe adjustment. Because of the angular dependence of the wavenumber transmitted by the Fabry-Perot, the entrance aperture can be positioned off-axis at an angle chosen such that the wavenumber shift across the entrance aperture matches the shift presented by the source, thereby compensating for the Doppler effect. The principle can be extended to the Michelson interferometer for Fourier transform spectroscopy when the Michelson is used without field compensation. High resolution spectra obtained with a PEPSIOS spectrometer using the entire disk of Jupiter, a rapidly rotating planet, are presented as an example.
来自快速旋转或快速流动光源的光的多普勒频移限制了使用具有常规轴向条纹调节的法布里 - 珀罗光谱仪进行研究时的光谱分辨率。由于法布里 - 珀罗透射的波数具有角度依赖性，入射孔径可以偏离轴线放置在一个选定的角度，使得穿过入射孔径的波数偏移与光源呈现的偏移相匹配，从而补偿多普勒效应。当迈克尔逊干涉仪在没有场补偿的情况下使用时，该原理可扩展到用于傅里叶变换光谱学的迈克尔逊干涉仪。以使用快速旋转的行星木星的整个圆盘的PEPSIOS光谱仪获得的高分辨率光谱为例进行了展示。
