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Elevation aperture control of an ultrasonic transducer

  • US 5,396,143 A
  • Filed: 05/20/1994
  • Issued: 03/07/1995
  • Est. Priority Date: 05/20/1994
  • Status: Expired due to Fees
First Claim
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1. A device for transmitting and receiving acoustic waves comprising:

  • a relaxor ferroelectric transducer for converting between electric wave energy and acoustic wave energy, said relaxor ferroelectric transducer having opposed generally planar sides;

    first electrode means for applying an electrical signal across said relaxor ferroelectric transducer, said first electrode means being in electrical communication with said relaxor ferroelectric transducer along a first of said opposed planar sides; and

    dielectric means extending between said relaxor ferroelectric transducer and said first electrode means for locally varying alignment of dipoles of said relaxor ferroelectric transducer, said dielectric means having a varying thickness, wherein said electrical communication of said first electrode means with said relaxor ferroelectric transducer changes in correspondence with said thickness.

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