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Digitizer and position encoders and calibration system for same

  • US 4,575,581 A
  • Filed: 02/06/1984
  • Issued: 03/11/1986
  • Est. Priority Date: 02/06/1984
  • Status: Expired due to Fees
First Claim
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1. A position encoding system, comprisingmeans for encoding position coordinates of a point,a position reference medium containing reference marks,means for processing calibration data, said calibration data based on a value of encoded coordinates of the reference marks,operation means for correction of encoding errors in accordance with said calibration data, so as to improve accuracy and repeatability for said encoding of position coordinates.

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