Abstract

The construction and the performance of a double-beam Michelson-type Fourier spectrometer are described. The instrument covers a wavenumber range from 10 cm⁻¹ to 450 cm⁻¹ with a maximum resolution of 0.025 cm⁻¹ and an accuracy of frequency within ±0.001 cm⁻¹. The optical path difference is measured by means of an He–Ne gas laser. To illustrate the general performance of the instrument, the pure rotational spectra of H₂O and CO have been recorded.

© 1975 Optical Society of America

A Double Beam, High Resolution Spectrometer for the Far Infrared

T. M. Hard and R. C. Lord
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