Patent ID: 6434496
Filing Date: 2002-08-13
Classification: G01J

Abstract:
A method for measuring a light absorption spectra comprising the steps of:(i) conducting a Fourier Transform of an absorption spectra measured by using a laser beam source to provide a Fourier transformed signal wherein the Fourier transform comprises describing said absorption spectra measured as an even function and an odd function for which a peak position of said absorption spectra forms a symmetrical axis and conducting Fourier transform on the even function and the odd function; (ii) disassembling in a Fourier space the Fourier transformed signal into a signal resulted from a periodic vibration component and a signal resulted from a molecular absorption spectra; (iii) removing the Fourier component resulted from said periodic vibration component in a Fourier space; and (iv) conducting an inverse Fourier transform on the signal from which said periodic vibration component is removed, whereby reproducing an absorption spectra in a real space.