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Scanning System for Laser VelocimeterInterference fringes remain parallel and focus-spot diameter same. Scanning system proposed for laser velocimeter (laser Doppler anemometer) to maintain constant beam-crossing angle and beam-waist diameter maintaining beam waist locations at crossing points. As target fluid scanned, interference fringes formed by crossing beams remain parallel and the focus-spot diameter same. System allows accurate velocity profiles obtained in wind tunnels and other fluid flow systems.
Document ID
19870000222
Acquisition Source
Legacy CDMS
Document Type
Other - NASA Tech Brief
Authors
Gunter, William D. (NASA Ames Research Center, Moffett Field, Calif.)
De Young, Anemarie (NASA Ames Research Center, Moffett Field, Calif.)
Date Acquired
August 13, 2013
Publication Date
May 1, 1987
Publication Information
Publication: NASA Tech Briefs
Volume: 11
Issue: 5
ISSN: 0145-319X
Subject Category
Physical Sciences
Report/Patent Number
ARC-11547
Report Number: ARC-11547
ISSN: 0145-319X
Accession Number
87B10222
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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