ABSTRACT
The concept of Fourier spectrometer originated from the Fourier transformation used to obtain the absorptive or emissive spectrum of measured media. Fourier spectrometers have some advantages compared with the spectrometers used before [i.e., superior signal-to-noise ratio known in the literature as Fellgett's advantage; greater light efficiency (Jaquinot's advantage); results are obtained directly from computer calculations; and natural conversion of results by computer]. Indispensable time for indirect measurements, complex technology, and, in consequence, a rather high price are the Fourier spectrometer's disadvantages.
