Laser-generated ultrasonic source for a real-time dry-contact imaging system

G. Petculescu*, Y. Zhou, I. Komsky, Sridhar Krishnaswamy

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A laser-generated ultrasonic source, to be used with a real-time imaging device, was developed. The ultrasound is generated in the thermoelastic regime, in a composite layer composed of absorbing particles (carbon) and silicone rubber. The composite layer plays three roles: of absorption, constriction and dry-coupling. The central frequency of the generated pulse was controlled by varying the absorption depth of the generation layer. The maximum peak frequency obtained was 4MHz. When additional constriction was provided to the composite layer, the amplitude of the generated signal increased further, due to the large thermal expansion coefficient of the silicone. Images using the laser-generated ultrasonic source were taken.

Original languageEnglish (US)
Title of host publicationReview of Progress in Quantitative Nondestructive Evaluation
Subtitle of host publicationVolume 25A
Pages256-261
Number of pages6
Volume820 I
DOIs
StatePublished - Mar 6 2006
EventReview of Progress in Quantitative Nondestructive - Brunswick, ME, United States
Duration: Jul 31 2005Aug 5 2005

Other

OtherReview of Progress in Quantitative Nondestructive
CountryUnited States
CityBrunswick, ME
Period7/31/058/5/05

Keywords

  • Acoustic imaging
  • Dry-coupled ultrasound
  • Laser-generated ultrasound

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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