When transmitting energetic units the crux lies in a monochromator-comparator that allows to compare the spectroenergetic characteristics of radiation sources and detectors. For the last decade, the Fourier spectrometers have found a wide application in the world practice of optical and spectral analysis [1, 2]. Thanks to a number of advantages (high sensitivity, wide spectral range, high aperture ratio, accuracy of the wavelength scale, high rate of scanning, high level of automation, etc) , these instruments claim to a leadership in the field of spectral investigations. They deserve the most serious attention in the energetic photometry as well. Since the Fourier spectrometer is based on an interferometer, further we will consider the possible application of these instruments on the basis of an interferometer.