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Non-contacting holographic surface acoustic wave microscope

Non-contacting holographic surface acoustic wave microscope

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A non-contacting laser-based surface acoustic wave microscope is described, which overcomes the problem normally associated with non-contacting acoustic microscopy, namely the poor signal to noise ratio. The solution enables the scan rate to be increased dramatically. Details of the optical system and associated electronics are described.

References

    1. 1)
      • M. Liu , H.P. Ho , M.G. Somekh , J.M.R. Weaver . Non-contacting generation of focusedsurface acoustic waves using a customised zoneplate. Electron. Lett. , 4 , 264 - 265
    2. 2)
      • M. Clark , R. Smith . A direct-search method for the computer design of holograms. Opt. Commun. , 150 - 164
    3. 3)
      • K. Yamanaka , Y. Enomoto . Fringe pattern around surface crack observed with scanning acoustic microscope. Electron. Lett. , 18 , 638 - 640
http://iet.metastore.ingenta.com/content/journals/10.1049/el_19990222
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