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      • Department of Electrical and Electronics Engineering
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      High efficiency Lamb wave lens for subsurface imaging

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      Author
      Atalar, Abdullah
      Köymen, Hayrettin
      Date
      1989-10
      Source Title
      Ultrasonics Symposium Proceedings
      Publisher
      IEEE
      Pages
      813 - 816
      Language
      English
      Type
      Conference Paper
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      Abstract
      A conventional scanning acoustic microscope lens excites all the possible modes of acoustic waves in the solid structure under examination. The excited leaky modes contribute significantly to the high contrast obtained in the images, but because all such modes exist simultaneously, the interpretation of the images is not straightforward. A new lens geometry that can be used with acoustic microscopes to image layered solid structures is proposed. This new lens can efficiently focus the acoustic waves in only one of the Lamb wave modes of the layered solid. The images obtained are easy to interpret, and the subsurface sensitivity is high.
      Keywords
      Acoustic Imaging
      Lamb wave lens
      Layered solid structures
      Scanning acoustic microscope
      Subsurface imaging
      Acoustic microscopes
      Permalink
      http://hdl.handle.net/11693/27832
      Published Version (Please cite this version)
      https://doi.org/10.1109/ULTSYM.1989.67100
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      • Department of Electrical and Electronics Engineering 3637
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