Abstract

Calculations of the SNR obtainable with a Fourier transform spectrometer as well as that obtainable with a photometer or scanning device are presented. It is shown that the SNR obtained with a Fourier spectrometer is (N/8)1/2 greater than that obtained with a scanning device (where N is the desired number of spectral elements scanned). Reasons why this factor, known as the multiplex advantage, differs from other values found in the literature are discussed.

© 1977 Optical Society of America

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