Hand held phase-shifting diffraction Moire interferometer

Patent · Tue Sep 20 00:00:00 EDT 1994

OSTI ID:6996214

Deason, V A; Ward, M B

An interferometer is described 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. 4 figs.

• DOE Contract Number: AC07-76ID01570
• Assignee: EG G Idaho, Inc., Idaho Falls, ID (United States)
• Patent Number(s): US 5349442; A
• Application Number: PPN: US 8-034636
• OSTI ID: 6996214
• Resource Relation: Patent File Date: 18 Mar 1993
• Country of Publication: United States
• Language: English

Related Subjects

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DATA ACQUISITION SYSTEMS
DESIGN
IDENTIFICATION SYSTEMS
INTERFEROMETERS
DIFFRACTION GRATINGS
LASER RADIATION
OPERATION
PHASE SHIFT
PORTABLE EQUIPMENT
STRESS ANALYSIS
ELECTROMAGNETIC RADIATION
EQUIPMENT
GRATINGS
MEASURING INSTRUMENTS
RADIATIONS
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