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Chirp Focused Transmitter Theory

  • J. Souquet
  • G. S. Kino
  • T. Waugh

Abstract

We have described an electronically focused and scanned acoustic imaging device in earlier papers.1,2 This device was constructed by using a tapped acoustic surface wave delay line as a phase reference for an array of piezoelectric transducers. By inserting a frequency modulated chirp along the delay line, the device can be used either as a receiver or as a transmitter. In the transmit mode, it acts like a moving lens, emitting a focused beam which scans along a plane parallel to the array at a velocity comparable to the acoustic velocity. The same array can be used in the receive mode. By this means, a B-scan device was constructed which has good transverse and range definition..

Keywords

Delay Line Side Lobe Main Lobe Chirp Signal Side Lobe Level 
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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References

  1. 1.
    J. Fraser, J. Havlice,G. Kino, W. Leung, H. Shaw, K. Toda, T. Waugh, D. Winslow, and L. Zitelli, “A Two-Dimensional Electronically Focused Imaging System,” presented at the IEEE Group on Sonics and Ultrasonics Symposium, November 11 - 14, 1974.Google Scholar
  2. 2.
    J. Fraser, J. Havlice, G. Kino, W. Leung, H. Shaw, K. Toda, T. Waugh, D. Winslow, and L.;Zitelli, “An Electronically Focused Two-Dimensional Acoustic Imaging System,” Acous-tical Holography, edited by Newell Booth; Vol. 6, 1975, pp. 275.-304.Google Scholar
  3. 3.
    J. Souquet, Ph.D. Thesis, Stanford University, Stanford, California (1976)Google Scholar

Copyright information

© Springer Science+Business Media New York 1977

Authors and Affiliations

  • J. Souquet
    • 1
  • G. S. Kino
    • 1
  • T. Waugh
    • 1
  1. 1.Stanford UniversityStanfordUSA

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