Dynamic Holographic Lock-In Imaging of Ultrasonic Waves

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Description

A laser imaging approach is presented that utilizes the adaptive property of photorefractive materials to produce a real-time measurement of ultrasonic traveling wave surface displacement and phase in all planar directions simultaneously without scanning. The imaging method performs optical lock-in operation. A single antisymmetric Lamb wave mode image produces direct quantitative determination of the phase velocity in all planar directions showing plate stiffness anisotropy. Excellent agreement was obtained with modeling calculations of the phase velocity in all planar directions for an anisotropic sheet material. The approach functions with diffusely scattering surfaces, subnanometer motions and at frequencies from Hz to GHz.

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Telschow, Kenneth Louis; Deason, Vance Albert & Datta, S.K. May 1, 1999.

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Description

A laser imaging approach is presented that utilizes the adaptive property of photorefractive materials to produce a real-time measurement of ultrasonic traveling wave surface displacement and phase in all planar directions simultaneously without scanning. The imaging method performs optical lock-in operation. A single antisymmetric Lamb wave mode image produces direct quantitative determination of the phase velocity in all planar directions showing plate stiffness anisotropy. Excellent agreement was obtained with modeling calculations of the phase velocity in all planar directions for an anisotropic sheet material. The approach functions with diffusely scattering surfaces, subnanometer motions and at frequencies from Hz to GHz.

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  • 17th Symposium on Energy Engineering Science,Argonne National Laboratory,05/13/1999,05/14/1999

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  • Report No.: INEEL/CON-99-00472
  • Grant Number: DE-AC07-99ID-13727
  • Office of Scientific & Technical Information Report Number: 911364
  • Archival Resource Key: ark:/67531/metadc885654

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  • May 1, 1999

Added to The UNT Digital Library

  • Sept. 22, 2016, 2:13 a.m.

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  • Dec. 5, 2016, 2:31 p.m.

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Telschow, Kenneth Louis; Deason, Vance Albert & Datta, S.K. Dynamic Holographic Lock-In Imaging of Ultrasonic Waves, article, May 1, 1999; [Idaho Falls, Idaho]. (digital.library.unt.edu/ark:/67531/metadc885654/: accessed September 22, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.