Optical recording medium, reproduction apparatus, and tracking servo method

Optical recording medium, reproduction apparatus, and tracking servo method

  • CN 1,691,154 B
  • Filed: 04/26/2005
  • Issued: 10/10/2012
  • Est. Priority Date: 04/26/2004
  • Status: Active Grant
First Claim
Patent Images

1. optical recording media;

  • Comprise that wherein looking the recording layer and one that form the hole with convex shape sideways from laser incident one for one wherein looks the recording layer that forms the hole with the concave shape sideways as wherein going here and there the recording layer of record data through the hole from laser incident one;

    Wherein, said hole is to form to the degree of depth in the scope of λ

    /6 to be set at λ

    /4.5 with respect to laser wavelength lambda.

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