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Laser generation of convergent acoustic waves and applications to materials evaluation

From National Research Council Canada

DOIResolve DOI: https://doi.org/10.1109/ULTSYM.1986.198792
AuthorSearch for: 1; Search for: 1
Affiliation
  1. National Research Council Canada
FormatText, Article
ConferenceIEEE 1986 Ultrasonics Symposium, Nov. 11-17, 1986, Williamsburg, VA
Subjectacoustic waves; optical materials; acoustic materials; surface acoustic waves; acoustic signal detection; surface emitting lasers; thermoelasticity; laser theory, inspection; optical pulse generation
Abstract
A converging-wave technique for laser generation and detection of focused acoustic waves is described together with a number of applications to the nondestructive testing and characterization of industrial materials. An annular-shaped wave is produced by irradiating the inspected material with a laser beam focused through a suitable combination of spherical and conical lenses. The ultrasonic pulse reaches a relatively high amplitude in the center of convergence, where it is probed by a noncontact interferometric optical sensor. Applications to the ultrasonic characterization of ceramic materials, coating thickness evaluation, detection of delaminations in layered materials as well as crack inspection are described.
Publication date
PublisherIEEE
In
  • IEEE 1986 Ultrasonics Symposium: 515–526.
LanguageEnglish
Peer reviewedYes
NRC numberCNRC 26653
NRC-IGM86-404-434
NPARC number23004068
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Record identifiera95f2ce6-05bc-4f5b-a43a-2222106c1b31
Record created2018-09-25
Record modified2020-03-17
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