Abstract

A partly cryogenic Fabry-Perot interferometer with a spectral resolution of 105 for the 10-μm atmospheric window is described. It consists of a series of two etalons with ZnSe plates, one of which is cooled, and a cooled grating spectrometer with a Si:As detector. The logic of its design is discussed, and details are given of the parts which are special for the ir wavelength region. Preliminary data on the performance indicate that the instrument meets the specifications.

© 1979 Optical Society of America

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