Diffractive acoustic elements for laser ultrasonics

M. Clark, S. D. Sharples, Michael Geoffrey Somekh

Research output: Journal article publicationJournal articleAcademic researchpeer-review

21 Citations (Scopus)

Abstract

Laser ultrasonics is an effective means of generating surface acoustic waves (SAWs). We have shown in previous publications how computer-generated holograms (CGHs) can be used to project optical distributions onto the sample surface. These can be used to control both the frequency content and the spatial distribution of the resulting ultrasound field. In this paper the concept is extended further to produce distributions which themselves act as diffractive acoustic elements (DAEs) for SAWs. It is demonstrated how frequency suppression, multiple foci, and frequency selective focusing of Rayleigh waves may be achieved with these elements. Agreement between the distributions predicted from the designs and those actually measured is excellent. (C) 2000 Acoustical Society of America.
Original languageEnglish
Pages (from-to)3179-3185
Number of pages7
JournalJournal of the Acoustical Society of America
Volume107
Issue number6
DOIs
Publication statusPublished - 1 Jun 2000
Externally publishedYes

ASJC Scopus subject areas

  • Arts and Humanities (miscellaneous)
  • Acoustics and Ultrasonics

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