Two-beam interferometer apparatus and method, and spectrometer u

Details Two-beam interferometer apparatus and method, and spectrometer u Two-beam interferometer apparatus and method, and spectrometer u

1991-10-09

1993-03-23

Turner, Samuel A.

Optics: measuring and testing

By particle light scattering

With photocell detection

G01B 902

Patent

active

051969025

ABSTRACT:
A two-beam interferometer for Fourier spectroscopy comprises one or two reflecting channels, each having at least one relatively movable wall to vary the path length of a beam traversing the same. A beam passing through the channel makes multiple reflections therewithin, impinges upon a retroreflector, and is transferred back through the channel along the same path to recombine with a second beam, which can be similarly reflected. The multiple reflections that occur within the channel allow a large total path length change to be accomplished with a small degree of motion of the movable wall, to thereby achieve high levels of resolution.

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