Analysis of Vibrating Surfaces Using Acoustic Holography

  • Masahide Yoneyama
  • Carl Schueler
  • Glen Wade
Part of the Acoustical Imaging book series (ACIM, volume 10)


Laser holographic interferometry has proved to be a useful tool for analysis of oscillating surfaces. Unfortunately, optical interferometry is limited to vibration amplitudes of microns or less because of the short wavelength of laser light, and to small objects because of coherence requirements and the limited power in a dispersed laser beam. We examine an acoustic holographic method to overcome the limitations of laser holography for vibrational analysis. Since powerful, coherent ultrasound can be dispersed over a large area, large objects may be analyzed. The long acoustic wavelength allows millimeter vibrational amplitudes, a thousand times larger than laser holography can handle. Acoustic holographic detection is linear, whereas optical interferometry is a non-linear process, in practice. Therefore, acoustic holography should allow the object’s vibrational amplitude to be obtained for every point on the object surface, whereas, in practice, laser interferometry yields the vibrational amplitude only at discrete points (the null points) on the object surface. Using theoretical analysis and computer simulations, we consider vibrational analysis of objects with vibrational amplitudes in the millimeter range. We present the theory for surface vibration with variation in two dimensions, and with both plane-wave insonification as well as the more general case of spherical wave insonification.


Vibrational Analysis Point Reflector Holographic Interferometry Vibrational Amplitude Laser Interferometry 


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Copyright information

© Plenum Press, New York 1982

Authors and Affiliations

  • Masahide Yoneyama
    • 1
  • Carl Schueler
    • 2
  • Glen Wade
    • 2
  1. 1.Nippon Columbia Co., Ltd.Kawasaki-Ku, Kawasaki 210Japan
  2. 2.Dept. of Electrical and Computer EngineeringUniversity of CaliforniaSanta BarbaraUSA

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