Accession Number:

AD0756521

Title:

An Investigation of the Principles and Techniques of Bragg Diffraction Laser Beam Probing of an Ultrasonic Field

Descriptive Note:

Master's thesis

Corporate Author:

NAVAL POSTGRADUATE SCHOOL MONTEREY CA

Personal Author(s):

Report Date:

1972-12-01

Pagination or Media Count:

39.0

Abstract:

Probing of the near field of an ultrasonic beam in water with a thin laser beam has verified that a diffracted beam of light, whose amplitude is a function of the angle of incident light, is related to the spatial Fourier spectrum of the far-field acoustic distribution. There are indications that this method of probing may be useful in evaluating transducer mountings. As an application of the technique, reflection-transmission properties of sound on a liquid-liquid interface are examined, and the detection of evanescent waves verifies their physical existence and properties.

Subject Categories:

  • Acoustic Detection and Detectors
  • Acoustics
  • Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE