Effect of Non-Equidistance of Interferogram Registration Points in a Fourier Spectrometer on the Obtained Spectra
One of the types of errors in determining the optical path difference in the recorded interferogram, which violates the equidistance of its registration points, is investigated. The considered errors have a periodic character due to the nature of the control ADC signals generated when the reference signal passes through the zero value. Such errors lead to the appearance of characteristic spirits in the resulting spectra. By means of mathematical modeling, the requirements for the value () of these errors are estimated. The behavior of spirits corresponding to different frequencies of the spectrum is studied. The dependences of their values at the selected frequencies on are calculated.