High efficiency Lamb wave lens for subsurface imaging
Author
Atalar, Abdullah
Köymen, Hayrettin
Date
1989-10Source Title
Ultrasonics Symposium Proceedings
Publisher
IEEE
Pages
813 - 816
Language
English
Type
Conference PaperItem Usage Stats
146
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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 ImagingLamb wave lens
Layered solid structures
Scanning acoustic microscope
Subsurface imaging
Acoustic microscopes