skip to main content
DOE Patents title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: 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:
;
Issue Date:
OSTI Identifier:
6252280
Patent Number(s):
5231468 A
Application Number:
PPN: US 7-788395
Assignee:
EG and G Idaho, Inc., Idaho Falls, ID (United States)
DOE Contract Number:  
AC07-76ID01570
Resource Type:
Patent
Resource Relation:
Patent File Date: 6 Nov 1991
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION; INTERFEROMETERS; DESIGN; DATA ACQUISITION; DISTANCE; INTERFEROMETRY; OPTICAL FIBERS; PHASE SHIFT; SHUTTERS; THERMAL EXPANSION; EXPANSION; FIBERS; MEASURING INSTRUMENTS; 440600* - Optical Instrumentation- (1990-)

Citation Formats

Deason, V A, and Lassahn, G D. Beam shuttering interferometer and method. United States: N. p., 1993. Web.
Deason, V A, & Lassahn, G D. Beam shuttering interferometer and method. United States.
Deason, V A, and Lassahn, G D. Tue . "Beam shuttering interferometer and method". United States.
@article{osti_6252280,
title = {Beam shuttering interferometer and method},
author = {Deason, V A and Lassahn, G 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 = {1993},
month = {7}
}