Non-contacting holographic surface acoustic wave microscope

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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.

Inspec keywords: acoustic holography; acoustic microscopes; surface acoustic wave devices

Other keywords: laser-based microscope; holographic surface acoustic wave microscope; optical system; signal to noise ratio; scan rate

Subjects: Sonic and ultrasonic applications; Holography; Measurement by acoustic techniques; Acoustic holography; Acoustic wave devices

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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