Interferometer

Details Interferometer Interferometer

1985-07-16

1987-07-21

Willis, Davis L.

Optics: measuring and testing

By particle light scattering

With photocell detection

G01J 345

Patent

active

046814450

ABSTRACT:
In beam splitting interferometers for use in Fourier transform spectrometers working in the infra-red region from 2.5 microns to 50 microns wavelength, it is impossible to provide a single beam splitting assembly which is efficient over the whole wavelength range, due to the limitations of available materials. In a set of interchangeable beam splitters it is difficult to ensure sufficiently accurate registration of each beam splitter after a change. The invention provides a set of beam splitters held stationary in separated locations and radiation directing means which passes an input beam through a beam splitter, which selects the recombined beam emerging from a desired beam splitter, and which passes it to a detector in a fixed location.

REFERENCES:
Martin, Infrared Interferometric Spectrometers, pub. by Elsevier Scientific Pub. Co., New York, pp. 197-201, 1980.

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