Efficient Acoustical Holography and Phase Imaging with High Resolution at 3.6 MHz Using a Liquid Crystal Convertor

  • Jean-Luc Dion
Part of the Acoustical Imaging book series (ACIM, volume 15)

Abstract

For some time, the field of acoustical holography at megahertz frequencies has suffered a decline due to various causes such as complexity of implementation, excessive computation times, artifacts due to coherence, etc. Overall, the lack of fast and relatively simple means of conversion of the acoustical hologram into a visible image has been a decisive factor. As we know, three main field detection and recording techniques have evolved in the last twenty years or so:
  1. a)

    One- or two-dimensional scanning with a transducer or a transducer array.1–3

     
  2. b)

    Levitation of a liquid surface. 4–6

     
  3. c)

    Nematic liquid crystal convertor. 7–12

     

Keywords

Anisotropy Torque Attenuation Epoxy Coherence 

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References

  1. 1.
    B. Hosten and J. Roux, Visualisation numérique d’un champ ultrasonore aérien, Acustica, v. 40, pp. 240–245, 1978.Google Scholar
  2. 2.
    M. Ahmed, K.Y. Wang and A.F. Metherell, “Holography and its applications to acoustic imaging”, Proc. IEEE, v.67, No 4, pp. 466–483, 1979.CrossRefGoogle Scholar
  3. 3.
    Y. Aoki, “Image reconstruction by computer” in Acoustical holography, Acoustical Holography, v. 5, P.S. Green, ed., (Plenum Press, N.Y., 1974), pp. 551–572.Google Scholar
  4. 4.
    B.B. Brenden, “History and present status of liquid surface acoustical holography”, J. Acoust. Soc. Amer., v. 58, pp. 951–955, 1975.CrossRefGoogle Scholar
  5. 5.
    A.V. Clark, Jr., “On obtaining maximum performance from liquid surface levitation holography”, Acoustical Imaging, v. 8, A.F. Metherel, ed., (Plenum Press, 1980), pp. 417–454.CrossRefGoogle Scholar
  6. 6.
    “Arthir: Acoustical real-time holographic image reproduction”, HTIAC Newsletter, v. 7, No 11, 1980, U.S. Dept. of Def. Inf. Analysis Center,Google Scholar
  7. 7.
    P. Greguss, “A new liquid crystal acoustical-to-optical display”, Acustica, V. 29, pp. 52–58, 1973.Google Scholar
  8. 8.
    J.N. Perbet, M. Hareng, S. Le Berre and B. Mourey, “Visualisation d’images acoustiques à l’aide d’un cristal liquide nématique”, Revue Tech. Thomson-GSF, 11, No 4, pp. 837–870, 1979.Google Scholar
  9. 9.
    O.A. Kapustina and V.N. Lupanov, “Acousto-optical properties of a nematic crystal layer with homogeneous orientation”, Sov. Phys. JETP, v. 44, No 6, pp. 1225–1228, 1976.Google Scholar
  10. 10.
    J.L. Dion, A. Leblanc and A.D. Jacob, “Pseudo-holographic acoustical imaging with a liquid crystal convertor”, Acoustical Imaging, v. 10, A.F. Metherell, ed., (Plenum Press, 1982), pp. 151–166.Google Scholar
  11. 11.
    J.L. Dion, Canadian Patent No. 1, 112, 750; U.S. Patent No. 4, 338, 821; European Patent No. 0,010,492.Google Scholar
  12. 12.
    J.L. Dion, A. Malutta and J. Bussiere, “Camera ultrasonore à cristal liquide”, Advanced NDE Technology/Développements Récents en Evaluation non-destructive, Symposium, 1982, Institut de Génie des Matériaux, C.N.R.C., Boucherville, (Québec).Google Scholar
  13. 13.
    Jean-Luc Dion, “Un nouvel effet des ultrasons sur l’orientation d’un cristal liquide, C.R. Acad. Sc. Paris, 284, série B, pp. 219–222, 1977.Google Scholar
  14. 14.
    J.L. Dion and A.D. Jacob, “A new hypothesis on ultrasonic interaction with a nematic liquid crystal”, Appl. Phys. Lett., v.31, No 8 (1977), pp. 490–493.CrossRefGoogle Scholar
  15. 15.
    B.P. Hildebrand and K. Suzuki, “Acoustical holographic interferometry”, Jap. J. Appl. Phys., v. 14, No 6, pp. 805–813, 1975.CrossRefGoogle Scholar
  16. 16.
    J. Pasteur and Y. Seyzeriat, “Holographie acoustique; application au traitement optique de l’information acoustique”, Optica Acta, v. 24, No 8, pp. 859–875, 1977.CrossRefGoogle Scholar

Copyright information

© Plenum Press, New York 1987

Authors and Affiliations

  • Jean-Luc Dion
    • 1
  1. 1.Laboratoire d’Électronique industrielle, Département d’IngénierieUniversité du Québec à Trois-RivièresTrois-RivièresCanada

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