Laser System for the Detection of Flaws in Solids

Wellman, Ronald J.

doi:10.21236/ada086124

Cited by 4 publications

(1 citation statement)

References 12 publications

(20 reference statements)

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“…Assuming a beam diameter larger than the ultrasonic wavelengths of interest, one may describe a plane-wave solution of the type presented by Wellman (43). If the laser power density is insufficient to cause melting, generation occurs by thermal expansion following absorption of laser energy, initially within the skin depth 6.…”

Section: Thermoelastic Generation At a Free Sulfacementioning

confidence: 99%

Mechanisms of pulsed photoacoustic generation

Hutchins¹

1986

Can. J. Phys.

146

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The mechanisms by which ultrasonic transients may be generated by pulsed laser irradiation are reviewed, with particular reference to the wave forms resulting in both fluid and solid media. Specilic examples of experimental results are presented that demonstrate that a pulsed ultraviolet source is a convenient means for ultrasonic generation in both liquids and solids.Une revue est faitc des micanismes par lesquels des ondes ultrasoniqucs transitoires peuvent ttre gCnCrkes par irradiation laser pulsie, avec une attention particulikre portie aux formes d'ondes risultantes dans les milieux fluides et solides. Des exemples spicifiques de rCsultats expirimentaux sont prksentis, qui dimontrent qu'une source ultra-violette pulsie est un moyen pratique de g6nCration d'ultra-sons ii la fois dans les liquides et les solides.[Traduit par la revue]

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Section: Thermoelastic Generation At a Free Sulfacementioning

confidence: 99%

Mechanisms of pulsed photoacoustic generation

Hutchins¹

1986

Can. J. Phys.

146

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Pulsed Photoacoustic Materials Characterization

Hutchins

Tam

1986

IEEE Trans. Ultrason., Ferroelect., Freq. Contr.

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Optical Detection of Ultrasound

Monchalin

1986

IEEE Trans. Ultrason., Ferroelect., Freq. Contr.

571

208

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A review of the various optical methods to detect ultrasound (bulk and surface waves) at the surface of opaque solids is presented. The most useful techniques are thoroughly analyzed. Their performance when nonideal conditions are encountered, such as vibrations, air turbulence, and rough light scattering surfaces is evaluated. This review includes a description of knife-edge techniques, optical heterodyning, differential interferometry, and velocity (time-delay) interferometry methods, plus a mention of various less-important techniques.

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Laser System for the Detection of Flaws in Solids

Cited by 4 publications

References 12 publications

Mechanisms of pulsed photoacoustic generation

Mechanisms of pulsed photoacoustic generation

Pulsed Photoacoustic Materials Characterization

Optical Detection of Ultrasound

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