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Transducer with integral memory

  • US 4,868,476 A
  • Filed: 10/30/1987
  • Issued: 09/19/1989
  • Est. Priority Date: 10/30/1987
  • Status: Expired due to Term
First Claim
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1. A servo-controlled scanning transducer system of the type having a transducer including a transducer element to be scanned, means for sensing the position of the element in its scan path and means responsive to the position sensed by said sensing means for controlling the movement of said element, a means for compensating for errors in transducer element scanning, comprising:

  • memory means for storing correcting information for said errors; and

    means for mounting the memory means integral with the transducer element;

    said means for controlling including means for generating a reference signal, means for comparing the position of the transducer element sensed by said position sensing means at a point in time with the reference signal for the corresponding point in time, drive means responsive to a difference output from the means for comparing for controlling the scanning of the transducer element, and means for utilizing the correcting information stored in said memory means to warp the reference signal in a manner to permit a substantially uniform scan speed for said transducer element.

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