APPLICATION OF HOLOGRAPHIC INTERFEROMETRY TO ANALYSIS OF SINUSOIDALLY-EXCITED ACOUSTIC TRANSDUCERS.

Abstract

An application of optical holography known as 'Holographic Interferometry' has been developed which enables experimentalists either to measure deformations of a few microns in loaded mechanical systems or to examine relative displacements in sinusoidally-vibrating systems. The fundamental theory of holography and four techniques for holographic interferometry are described in this report. A system constructed to record interferograms of acoustic transducers operating either in air or submerged in water is discussed and some results of examining a sinusoidally-excited 7-inch permanent-magnet loudspeaker with interferograms are considered. (Author)

Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1969
Accession Number
AD0708391

Entities

People

  • David John Griffiths

Organizations

  • Naval Postgraduate School

Tags

DTIC Thesaurus Topics

  • Communication Equipment
  • Determinants (Mathematics)
  • Displacement
  • Electroacoustic Transducers
  • Holography
  • Interferograms
  • Interferometry
  • Loudspeakers
  • Magnets
  • Microphones
  • Permanent Magnets
  • Transducers

Fields of Study

  • Physics

Readers

  • Acoustical Oceanography.
  • Image Processing and Computer Vision.
  • Mechanical Engineering/Mechanics of Materials.