Optics: measuring and testing – Velocity or velocity/height measuring – With light detector
Patent
1980-12-22
1984-02-07
Buczinski, S. C.
Optics: measuring and testing
Velocity or velocity/height measuring
With light detector
340850, 356346, 356352, G01P 336, G01B 902
Patent
active
044299940
ABSTRACT:
A system for remotely sensing the velocity of sound in water using Brillouin scattering. A pulsed laser irradiates the water and the scattered light is collected, collimated and passed through a Fabry-Perot interferometer, then to a photomultiplier. The photomultiplier output is digitized. The interferometer is driven by a ramp generator, and the instantaneous voltage corresponds to the point in the frequency domain to which the digitized output corresponds. For each spectrum, a plurality of laser shots is obtained. A register contains the record of each shot, and when full its contents are transferred to a storage medium. A computer reads the storage medium and develops a three dimensional graphic representation the axes of which are frequency, intensity and depth.
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LEVIS et al., "An Optical Radar for Airborne Use Over Natural Waters" 25-28 ep. 1973 IEEE Ocean Conference, pp. 76-83.
Dufilho Harold L.
Guagliardo John L.
Beers R. F.
Buczinski S. C.
Gray Francis I.
The United States of America as represented by the Secretary of
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