ABSORPTION AND DISPERSION STUDIES IN RANGE 10-1000 CM-1 USING A MODULAR MICHELSON INTERFEROMETER

A modular Michelson interferometer has been developed for use as a Fourier transform spectrometer providing both absorption and refraction spectra. The spectral range that it was intended to cover, 10-200 cm-1, represents only a part of its useful range which extends to 500 cm-1. It is shown that a few simple modifications enable the upper frequency limit to be raised to 1000 cm-1. There is no evidence for frequency errors greater than the resolution limit, nor are there any spurious features present in the spectra due to artefacts. © 1969.