Abstract

A new interferometer has been developed which can be used both for analyzing the homogeneity of ir materials and for inspecting the waveform emerging from an optical system. This new type of interferometer utilizes a diffraction grating as a beam divider and further permits an important variation in the fringe contrast to be obtained for a given blaze angle by the variation of the efficacity of the grating with the orientation of the plane of polarization. This improvement permits the compensation of photometric losses due to either an absorbing material or a highly reflecting material that may be under test. By this way it is possible to evaluate all materials within a 10–100% transmission range. This interferometer functions at 10.6 μm. Results obtained are detailed herein.

© 1975 Optical Society of America

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