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Laser velocimeter for near-surface measurementsThe present invention relates to a laser Doppler velocimeter for near-wall measurements which includes at least one beam-turning device. The beam-turning device receives laser light, reflects and redirects the light at various angles in order to obtain measurements for all three velocity components at grazing incident angles. The beam-turning device includes a mirror or prism at one end which reflects the received light in a particular direction. A collector lens receives the particle scattered light from which the relevant velocity components are determined. The beam-turning device can also be a miniature fiber optic head which outputs laser light and can be turned in any direction.
Document ID
19950017816
Acquisition Source
Legacy CDMS
Document Type
Other - Patent
Authors
Johnson, Dennis A. (NASA Ames Research Center Moffett Field, CA, United States)
Date Acquired
August 16, 2013
Publication Date
February 25, 1992
Subject Category
Instrumentation And Photography
Report/Patent Number
Patent Number: US-PATENT-5,090,801
Patent Number: NASA-CASE-ARC-11917-1
Patent Application Number: US-PATENT-APPL-SN-596105
Accession Number
95N24236
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Patent
US-PATENT-5,090,801|NASA-CASE-ARC-11917-1
Patent Application
US-PATENT-APPL-SN-596105

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