Optics: measuring and testing – Velocity or velocity/height measuring – With light detector
Patent
1988-06-10
1991-04-30
Buczinski, Stephen C.
Optics: measuring and testing
Velocity or velocity/height measuring
With light detector
350 9615, 350337, 350349, G01N 2100
Patent
active
050112791
ABSTRACT:
In a fiber-optical sensor used for measuring the Doppler broadening of scattered laser light by the principle of quasi-elastic light scattering (QELS), the scattered light originating from particles in movement, the emergence surface (7) for the laser light at the end of a single-mode or multimode light guide (3) used as an immersion probe is inclined at an angle 0<.phi..ltoreq.15.degree., preferably 1.degree..ltoreq..phi..ltoreq.6.degree., the angle of inclination being de-fined by the optical axis (8) of the light guide (3) and the normal (9) of the emergence surface (7).
REFERENCES:
patent: 4495412 (1985-01-01), Thoone et al.
patent: 4585298 (1986-04-01), Mori
patent: 4637716 (1987-01-01), Auweter et al.
patent: 4693552 (1987-09-01), Jeskey
patent: 4730883 (1988-03-01), Mori
patent: 4740047 (1988-04-01), Abe et al.
patent: 4793679 (1988-12-01), Toda et al.
Applied Optics 14 (1975); vol. 14, No. 1; pp. 189-196; "Measurement of the Velocity of Blood Flow Using a F. O. Catheter and Optical Mixing Specroscopy"; Tanaka et al.
Microwaves, Optics and Acoustics (1978); vol. 2, No. 1; pp. 13-18; "The Fibre-Optic Doppler Anemometer", by R. B. Dyott.
Auweter Helmut
Horn Dieter
Lilge Dieter
Wortmann Juergen
BASF - Aktiengesellschaft
Buczinski Stephen C.
Gregory Bernarr Earl
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