NASA NTRS · 19870000222
Scanning System for Laser Velocimeter
Abstract
Interference 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.
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Gunter, William D., De Young, Anemarie. 1987-05-01. Scanning System for Laser Velocimeter. https://ntrs.nasa.gov/citations/19870000222
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