Laser velocimeter for near-surface measurements

Details Laser velocimeter for near-surface measurements Laser velocimeter for near-surface measurements

1990-10-11

1992-02-25

Buczinski, Stephen C.

Optics: measuring and testing

Velocity or velocity/height measuring

With light detector

356 28, B01P 336

Patent

active

050908014

ABSTRACT:
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.

REFERENCES:
patent: 4099870 (1978-07-01), Luzzi
patent: 4142796 (1979-03-01), Riva
patent: 4148585 (1979-04-01), Bargeron et al.
patent: 4575238 (1986-03-01), Knuhtsen et al.
patent: 4659218 (1987-04-01), Lasa et al.
patent: 4807990 (1989-02-01), Keefer
patent: 4838687 (1989-06-01), Pfeifer
Vasudevan et al., Conf: Intl. Cong. Instr. Aerospace Simulation Facilities, 21 Jun. '71, Belgium.
Electronics, p. 24, 28 Dec. 1964.
T. Tanaka et al., Applied Optics, Jan. 1975, vol. 14, No. 1.

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