ABSTRACT: A versatile, double beam Michelson interferometer for the middle ir has been constructed. The moving mirror operates in a constant velocity mode. In contrast to instruments of a similar nature, the same area of the beam splitter is used for separation and recombination of all interacting beams, but the beams occupy different parts of the permissible solid angle. Calibration and ratio recording techniques were applied to atmospheric emission spectra shown between 750 cm(-1) and 1250 cm(-1) with a resolution better than one wavenumber.
Applied Optics 10/1969; 8(10):2059-65. · 1.41 Impact Factor