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Triple push-pull optical tracking system

  • US 6,940,676 B1
  • Filed: 06/07/2000
  • Issued: 09/06/2005
  • Est. Priority Date: 06/07/2000
  • Status: Expired due to Fees
First Claim
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1. A triple push pull optical tracking method comprising:

  • receiving a set of three reflectance values from three optical spots on a recording medium in an optical pickup system;

    generating three S-curves by pair-wise subtraction of reflectance values;

    generating a linear position estimate by processing the S-curves; and

    servoing the optical pickup system to the recording medium.

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