Beam shuttering interferometer and method
Abstract
A method and apparatus resulting in the simplification of phase shifting interferometry by eliminating the requirement to know the phase shift between interferograms or to keep the phase shift between interferograms constant. The present invention provides a simple, inexpensive means to shutter each independent beam of the interferometer in order to facilitate the data acquisition requirements for optical interferometry and phase shifting interferometry. By eliminating the requirement to know the phase shift between interferograms or to keep the phase shift constant, a simple, economical means and apparatus for performing the technique of phase shifting interferometry is provide which, by thermally expanding a fiber optical cable changes the optical path distance of one incident beam relative to another.
- Inventors:
-
- Idaho Falls, ID
- Issue Date:
- Research Org.:
- EG & G IDAHO INC
- OSTI Identifier:
- 868875
- Patent Number(s):
- 5231468
- Assignee:
- EG&G Idaho, Inc. (Idaho Falls, ID)
- Patent Classifications (CPCs):
-
G - PHYSICS G01 - MEASURING G01B - MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS
G - PHYSICS G01 - MEASURING G01J - MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED, VISIBLE OR ULTRA-VIOLET LIGHT
- DOE Contract Number:
- AC07-76ID01570
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- beam; shuttering; interferometer; method; apparatus; resulting; simplification; phase; shifting; interferometry; eliminating; requirement; shift; interferograms; constant; provides; simple; inexpensive; means; shutter; independent; facilitate; data; acquisition; requirements; optical; economical; performing; technique; provide; thermally; expanding; fiber; cable; changes; path; distance; incident; relative; beam relative; phase shifting; phase shift; data acquisition; fiber optic; optical path; incident beam; inexpensive means; thermally expand; /356/382/
Citation Formats
Deason, Vance A, and Lassahn, Gordon D. Beam shuttering interferometer and method. United States: N. p., 1993.
Web.
Deason, Vance A, & Lassahn, Gordon D. Beam shuttering interferometer and method. United States.
Deason, Vance A, and Lassahn, Gordon D. Fri .
"Beam shuttering interferometer and method". United States. https://www.osti.gov/servlets/purl/868875.
@article{osti_868875,
title = {Beam shuttering interferometer and method},
author = {Deason, Vance A and Lassahn, Gordon D},
abstractNote = {A method and apparatus resulting in the simplification of phase shifting interferometry by eliminating the requirement to know the phase shift between interferograms or to keep the phase shift between interferograms constant. The present invention provides a simple, inexpensive means to shutter each independent beam of the interferometer in order to facilitate the data acquisition requirements for optical interferometry and phase shifting interferometry. By eliminating the requirement to know the phase shift between interferograms or to keep the phase shift constant, a simple, economical means and apparatus for performing the technique of phase shifting interferometry is provide which, by thermally expanding a fiber optical cable changes the optical path distance of one incident beam relative to another.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri Jan 01 00:00:00 EST 1993},
month = {Fri Jan 01 00:00:00 EST 1993}
}