Accession Number : ADD017487

Title :   Acoustic-Optic Sound Velocity Profiler.

Descriptive Note : Patent, Filed 25 Mar 94, patented 3 Jan 95,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Connolly, George C

Report Date : 03 Jan 1995

Pagination or Media Count : 7

Abstract : An apparatus and method for determining the velocity of sound propagation in a fluid as a function of position in the fluid along an axis. A wave of acoustic energy is transmitted along the axis to produce a disturbance that moves in the medium at the velocity of sound. A laser generator transmits a light pulse substantially along the axis through the fluid medium. As the light passes through the disturbance, light backscatters in a characteristic pattern that a detector senses for analysis to provide information concerning the distance traveled and the time of travel for the acoustic wave through the fluid medium and to provide a profile of output characteristic, such as the speed of sound in the medium, as a function of position in the medium. (AN)

Descriptors :   *ACOUSTOOPTICS, *PATENTS, LIGHT SCATTERING, ACOUSTIC WAVES, BACKSCATTERING, LASERS, LASER BEAMS, PROFILES, WAVE PROPAGATION, LIGHT PULSES, LIGHT TRANSMISSION, SOUND TRANSMISSION, ACOUSTIC SIGNALS, TRANSDUCERS, TRAVEL, BANDWIDTH, OPTICAL DETECTORS, ACOUSTIC VELOCITY, ACOUSTIC FIELDS, FLUID FLOW, SIGNAL PROCEESING

Subject Categories : Acoustooptic and Optoacoustic Devices

Distribution Statement : APPROVED FOR PUBLIC RELEASE