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Dual-Mode Laser VelocimeterReversible lens system provides two velocity ranges. Laser velocimeter modified to provide two velocity ranges by adding rotatable assembly containing two lenses. In one orientation, beam waists narrow, and two beams intersect at relatively large angle, providing low velocity range with high spatial resolution. In reversed orientation beam waists are wider, and beams intersect at smaller angle to produce more-widely-spaced fringes in larger region, providing high velocity range with lower spatial resolution.
Document ID
19870000455
Acquisition Source
Legacy CDMS
Document Type
Other - NASA Tech Brief
Authors
Gunter, William D., Jr.
(NASA Ames Research Center, Moffett Field, Calif.)
Donaldson, Ralph W.
(NASA Ames Research Center, Moffett Field, Calif.)
Anderson, Alma G., Jr.
(NASA Ames Research Center, Moffett Field, Calif.)
Date Acquired
August 13, 2013
Publication Date
October 1, 1987
Publication Information
Publication: NASA Tech Briefs
Volume: 11
Issue: 9
ISSN: 0145-319X
Subject Category
Physical Sciences
Report/Patent Number
ARC-11634
Accession Number
87B10455
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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