Flaw Detection and Imaging by High-Resolution Synthetic Pulse Pulse Holography

  • Helmut Ermert
  • James O. Schaefer
Part of the Acoustical Imaging book series (ACIM, volume 10)


Many applications in the field of non-destructive testing are concerned with flaw detection and/or imaging. In such applications conventional holography using acoustic waves has been applied with some success. This technique has some disadvantages which limit the applicability of conventional (monofrequency) holography /1/. Conventional holography has very poor axial resolution, and with optical reconstruction significant image distortion as well as a combination of acoustical and optical speckle noise are seen. Good axial resolution can be obtained using wide-band holography and with computer reconstruction the problem of laser generated optical speckle in optical reconstruction is eliminated.


Lookup Table Axial Resolution Object Area Bandlimited Signal Acoustical Holography 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Plenum Press, New York 1982

Authors and Affiliations

  • Helmut Ermert
    • 1
  • James O. Schaefer
    • 1
  1. 1.Institut für HochfrequenztechnikUniversität Erlangen-NürnbergErlangenWest-Germany

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