Guelachvili G
Appl Opt. 1977 Aug 1;16(8):2097-101. doi: 10.1364/AO.16.002097.
For the first time, the resolution of a spectrometer capable of recording very wide spectral ranges is better than 10(-3) cm(-1). This performance, obtained by multipassing an existing Fourier interferometer, is initially intended to get Doppler-limited spectra around 20 microm. The halfwidth of the actual unapodized apparatus function can now be meaningfully expressed in frequency units and is found to be 27 MHz. With such an apparatus it becomes possible to record, from adequate sources, sub-Doppler spectra within wide spectral ranges in the visible and the near ir where the resolution can be easily of the order of 20 times less than the width of the Doppler profiles. The tilt-compensated multipass system which may be used to increase by 3 the resolution of already built Fourier interferometers is described together with the first results obtained on our instrument.
首次实现了能够记录非常宽光谱范围的光谱仪，其分辨率优于10^(-3)厘米^(-1)。通过对现有的傅里叶干涉仪进行多次通过获得的这一性能，最初旨在获得约20微米处受多普勒限制的光谱。实际未加窗仪器函数的半高宽现在可以用频率单位有意义地表示，结果为27兆赫兹。使用这样的仪器，就有可能从适当的光源记录可见光和近红外区域宽光谱范围内的亚多普勒光谱，在这些区域分辨率很容易比多普勒轮廓宽度小20倍左右。描述了可用于将已建成的傅里叶干涉仪分辨率提高3倍的倾斜补偿多通系统，以及在我们仪器上获得的首批结果。
