Optics: measuring and testing – Velocity or velocity/height measuring – With light detector
Patent
1988-03-10
1989-06-13
Buczinski, Stephen C.
Optics: measuring and testing
Velocity or velocity/height measuring
With light detector
356343, 356349, G01P 336, G01N 2100, G01B 902
Patent
active
048386871
ABSTRACT:
The subject matter of the invention is a technique which allows three components of the velocity of fluid flows to be measured simultaneously by means of methods based on the use of laser Doppler anemometry. In the present case an Argon-Ion laser serves as a light source for a conventional two-component system which produces with the blue line at 488 nm and with the green line at 515 nm two interference fringe patterns in the probe volume. The interference fringes are in this case oriented at a high angle to each other. The same Argon-Ion laser is used as a light source for pumping the dye laser which emits at a wavelength of approximately 600 nm. With this beam of light a third interference fringe system is generated which is also at a high angle with respect to the other two ones. The separation according to the three colors of the scattered light emanating from the probe volume is achieved by means of usual interference filters or colored filters.
REFERENCES:
patent: 3915572 (1975-10-01), Orloff
patent: 4126392 (1978-11-01), House
patent: 4470696 (1984-09-01), Ballard
patent: 4506979 (1985-03-01), Rogers
T. Sato and O. Sasaki, "New 3-D Laser Doppler Velocimeter using Cross-Bispectral Analysis," Applied Optics, vol. 17, No. 24, Dec. 15, 1978, pp. 3890-3894.
ICIASF '85 Record, by H. J. Pfeifer, IEEE Publication, 1985, CH 2210-3/85/0000-0056.
LDV System 9100-11 for Three Component Measurement, paper published by TSI, Inc.
Three Dimensional Laser Velocimetry: A Review, by A. Boutier, Ch. D'Humeires and D. Soulevant, Proc. Second Intern Symposium on Applications of Laser Anemometry to Fluid Mechanics, paper No. 10.5, 1984.
Technical Data, Dantec, Inc., Skolvlande, Denmark, p. 45.
Buczinski Stephen C.
Institut Franco-Allemand De Recherches De Saint-Louis
Wallace Linda J.
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