Abstract

A Michelson-type Fourier transform spectrometer has been constructed for high resolution work in the far ir. The instrument has a theoretical resolution of 0.007 cm−1 and can be used with a tunable band pass filter system for the reduction of sampling points in a specific spectral region. Separations of 0.05 cm−1 in the inversion spectrum of NH3 in the 200-cm−1 spectral region have been observed with about 1000 sampling points and splittings of 0.04 cm−1 in the NO2 spectrum at about 100 cm−1.

© 1976 Optical Society of America

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