A physicist who authored a National Bureau of Standards introduction to Fourier transform spectroscopy. It explains how scanning a Michelson interferometer produces an interferogram from which a Fourier transform recovers a spectrum. The reference connects optical path difference and sampling to practical spectral resolution, making the mathematical transform part of a reproducible measurement procedure.[ref]
Introduction to Fourier Transform Spectroscopy by Julius Cohen. Preface and treatment of the Michelson interferometer and Fourier reconstruction
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