FOURIER INTERFERENCE SPECTROMETER AND SPECTRAL INTENSITY MEASUREMENT METHOD

摘要

PROBLEM TO BE SOLVED: To provide a Fourier interference spectrometer capable of precisely measuring the spectral intensity of an incoming beam even when the intensity of the incoming beam changes in a time-variant manner.;SOLUTION: The Fourier interference spectrometer includes: an intensity monitoring section 3 which has an optical axis in a direction parallel to the optical axis of a beam interference section 1 for measuring the intensity of an incoming beam; and a gain adjustment section 4 that sets an inverse number of an intensity of the incoming beam measured by the intensity monitoring section 3 as a gain coefficient and multiplies the intensity of a synthetic light flux detected by a beam intensity detection section 2 by the gain coefficient. With this, the spectral intensity of an incoming beam can be precisely measured even when the intensity of the incoming beam changes in a time-variant manner.;COPYRIGHT: (C)2015,JPO&INPIT