Linear Receiving Array for Acoustic Imaging and Holography

  • G. C. Knollman
  • J. L. Weaver
  • J. J. Hartog


A hydroacoustic receiver intended for use in ultrasonic imaging and holography is described. An experimental model contains a 16-element rectilinear array of PZT transducers. Voltage output of each element at 2.1 MHz is amplified separately to a level at which acoustic sensitivity is limited by amplifier noise rather than by switching transients of the multiplex circuit. Amplifier outputs are sampled sequentially by the multiplexer at a rate of 8000 elements/second to produce one line of video information. Acoustic images in nondestructive test and medical applications are obtained by translating or rotating either the array or the test specimen. Utilization of such array for ultrasonic visualization in nondestructive testing is discussed, and methods for receiver miniaturization by use of hybrid-circuit techniques are proposed.


Nondestructive Test Linear Array Automatic Gain Control Acoustic Imaging Acceptance Angle 
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  1. 1.
    G. C. Knollman, A. E. Brown, J. L. Weaver, and J. L. S. Bellin, “Experimental Hydroacoustic Imaging System,” J. Appl. Phys. 42, 2168 (1971).ADSCrossRefGoogle Scholar
  2. 2.
    G. C. Knollman and A. E. Brown, “Hydroacoustic Image Transducer, ” Rev. Sci . Instr. 42, 1202 (1971).ADSCrossRefGoogle Scholar
  3. 3.
    G. C. Knollman and J. L. Weaver, “Acoustical Holography with a Scanned Linear Array,” J. Appl. Phys. 43, 3906 (1972).ADSCrossRefGoogle Scholar
  4. 4.
    T. F. Heuter and R. H. Bolt, Sonics (John Wiley, New York, 1955), Chap. 2.Google Scholar
  5. 5.
    G. S. Monk, Light, Principles and Experiments (McGrawHill, New York, 1937) , p. 171.Google Scholar
  6. 6.
    See, for example, A. F. Metherell, “The Relative Importance of Phase and Amplitude in Acoustical Holography,” Acoustical Holography (Springer Science+Business Media New York, 1969), Vol. 1, Chap. 14.Google Scholar
  7. 7.
    M. F. Tompssett, G. F. Amalio, and G. E. Smith, “Charge-Coupled Eight-Bit Shift Register,” Appl. Phys. Letts. 17, 111 (1970).ADSCrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media New York 1974

Authors and Affiliations

  • G. C. Knollman
    • 1
  • J. L. Weaver
    • 1
  • J. J. Hartog
    • 1
  1. 1.Lockheed Research LaboratoryPalo AltoUSA

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