A METHOD OF GAS CONCENTRATION MEASUREMENT BY CORRELATION INTERFEROMETRY

摘要

A method of correlation interferometry analyzes only radiation in a predetermined spectral region where target gases absorb. Data is processed entirely in the interferometric domain. The interferometric response at these values is functionally dependent on the concentration of the investigated gas. The present invention allows one to increase the sensitivity of measurements of the concentrations of target gases with known spectrum contained in the investigated gas medium without greatly sacrificing selectivity, while sampling over only a subset of intervales required for Fourier spectroscopy.