Application of holographic interferometry to analysis of sinusoidally-excited acoustic transducers.
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Authors
Griffiths, David John
Subjects
Advisors
Date of Issue
1969
Date
December 1969
Publisher
Monterey, California. U.S. Naval Postgraduate School
Language
en_US
Abstract
An application of optical holography known as "Holographic
Inter ferometry" has been developed which enables experimentalists
either to measure deformations of a few microns in
loaded mechanical systems or to examine relative displacements
in s inusoidally-vibrat ing systems. The fundamental theory
of holography and four techniques for holographic inter -
ferometry are described in this report. A system constructed
to record inter fer ograms of acoustic transducers operating
either in air or submerged in water is discussed and some
results of examining a s inusoidally-excited 7-inch permanentmagnet
loudspeaker with in ter fer ograms are considered.
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Thesis
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Distribution Statement
Approved for public release; distribution is unlimited.
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.