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Applications of Photoinductive Imaging

  • J. C. Moulder
  • M. W. Kubovich
  • J. M. Mann
  • M. S. Hughes
  • N. Nakagawa
Chapter
Part of the Review of Progress in Quantitative Nondestructive Evaluation book series

Abstract

Photoinductive imaging is a unique dual-mode NDE technique that combines eddy current and thermal wave methods. The photoinductive effect, upon which this method is based, is the thermally induced change in the impedance of an eddy current probe in proximity to a conducting surface that is illuminated with a modulated light source. The change in probe impedance is caused by the temperature-induced change in the conductivity of the specimen. Typical changes in probe impedance are small, on the order of a few ppm, but because they are synchronous with the light-beam modulation, lock-in techniques can be used to detect the signals, which can then be used to image surface or near-surface defects, voids, inclusions, or other thermal or structural inhomogeneities.

Keywords

Print Circuit Board Probe Impedance Foil Specimen Eddy Current Probe Eddy Current Density 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    J. C. Moulder, N. Nakagawa, K. S. No, Y. P. Lee and J. F. McClelland in Review of Progress in Quantitative NDE. edited by D. O. Thompson and D. E. Chimenti, (Plenum Press, New York, 1989)Vol. 8A, pp. 599–606.Google Scholar
  2. 2.
    H. S. Carslaw and J. C. Jaeger, Conduction of Heat in Solids, 2nd edition, ( Oxford University Press, London, 1959 ).Google Scholar
  3. 3.
    J. C. Moulder, D. N. Rose, D. C. Bryk, and J. S. Siwicki, “High-Resolution Thermal-Wave Imaging Using the Photoinductive Effect,” this volume.Google Scholar

Copyright information

© Springer Science+Business Media New York 1990

Authors and Affiliations

  • J. C. Moulder
    • 1
  • M. W. Kubovich
    • 1
  • J. M. Mann
    • 1
  • M. S. Hughes
    • 1
  • N. Nakagawa
    • 1
  1. 1.Center for NDEIowa State UniversityAmesUSA

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