Abstract
Acoustic holography in solids is of direct interest for the observation of defects within the solid. There is, however, another strong motivation for interest in solids: although the attenuation of sound in liquids becomes very large at frequencies in the UHF, it is possible to work with extremely thin liquid cells within the solid, the object to be imaged being introduced into the cell (see Figure 1). An imaging system using this technique at an acoustic frequency of 50 MHz has been reported(1). The work described here is an extension of this technique to a frequency of 150 MHz.
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References
Thomson J.K., Wickramasinghe H.K. and Ash E.A. ‘A Fabry-Perot Acoustic Surface Vibration Detector — Application to Acoustic Holography’. J.Phys.D.: Appl. Phys. Vol. 6, 1973, pp. 677–691.
Born M. and Wolf E. ‘Principles of Optics’ (New York, Pergamon), 1959, pp. 322–327.
Metherell A.F. ‘The Relative Importance of Phase and Amplitude in Acoustical Holography’, Acoustical Holography, Vol. 1 (New York, London, Plenum), 1969, pp. 203–220.
Wickramasinghe H.K. ‘Acoustic Holography in Solids with Special Reference to Acoustic Microscopy’, Ultrasonics, Vol. 11, No. 4, July 1973, pp. 146–147.
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© 1974 Springer Science+Business Media New York
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Wickramasinghe, H.K. (1974). High Frequency Acoustic Holography in Solids. In: Green, P.S. (eds) Acoustical Holography. Springer, Boston, MA. https://doi.org/10.1007/978-1-4757-0827-1_8
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DOI: https://doi.org/10.1007/978-1-4757-0827-1_8
Publisher Name: Springer, Boston, MA
Print ISBN: 978-1-4757-0829-5
Online ISBN: 978-1-4757-0827-1
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