Hand held phase-shifting diffraction moire interferometer

Patent · Sat Jan 01 00:00:00 EST 1994

OSTI ID:869510

Deason, Vance A ^[1]; Ward, Michael B ^[1]

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1. Idaho Falls, ID

An interferometer in which a coherent beam of light is generated within a remote case and transmitted to a hand held unit tethered to said remote case, said hand held unit having optical elements for directing a pair of mutually coherent collimated laser beams at a diffraction grating. Data from the secondary or diffracted beams are then transmitted to a separate video and data acquisition system for recording and analysis for load induced deformation or for identification purposes. Means are also provided for shifting the phase of one incident beam relative to the other incident beam and being controlled from within said remote case.

• Research Organization: EG & G IDAHO INC
• DOE Contract Number: AC07-76ID01570
• Assignee: EG&G Idaho, Inc. (Idaho Falls, ID)
• Patent Number(s): US 5349442
• OSTI ID: 869510
• Country of Publication: United States
• Language: English

Related Subjects

hand
held
phase-shifting
diffraction
moire
interferometer
coherent
beam
light
generated
remote
transmitted
unit
tethered
optical
elements
directing
pair
mutually
collimated
laser
beams
grating
data
secondary
diffracted
separate
video
acquisition
recording
analysis
load
induced
deformation
identification
purposes
means
provided
shifting
phase
incident
relative
controlled
moire interferometer
collimated laser
beam relative
laser beams
data acquisition
optical element
diffraction grating
optical elements
laser beam
incident beam
hand held
diffracted beam
shifting diffraction
diffraction moire
induced deformation
held unit
diffracted beams
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