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Method and system for calibrating a rotary encoder and making a high resolution rotary encoder

  • US 7,414,547 B2
  • Filed: 12/22/2006
  • Issued: 08/19/2008
  • Est. Priority Date: 12/22/2006
  • Status: Expired due to Fees
First Claim
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1. A calibration system for a rotary encoder, comprising:

  • a rotary encoder disposed on a manufacturing substrate, the rotary encoder including an encoder pattern having a plurality of lines spaced apart by a substantially fixed spacing distance and a detection system to detect position information corresponding to a position of the encoder pattern; and

    a calibration pattern written onto a surface of the substrate, the calibration pattern comprising a ring that includes a grating pattern, wherein a radial position of the grating pattern corresponds to an error value of the position of the encoder pattern.

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