Optical disk having pattern for tilt detection

Optical disk having pattern for tilt detection

  • CN 100,375,176 C
  • Filed: 03/15/1999
  • Issued: 03/12/2008
  • Est. Priority Date: 03/14/1998
  • Status: Active Grant
First Claim
Patent Images

1. CD, have on coding row record the track thereon of pit pattern or minute surface pattern with concentric circles or spiral form formation, wherein one has the tilt detection pattern recording of predetermined inclination indication coding row on track, described tilt detection pattern is positioned on the subregion at least of described CD, make the tilt quantity of described CD determine according to the tracking error signal offset amount of the track adjacent with the track that comprises described pre-determined tilt indication coding row, wherein, the tracking error signal of described tilt detection area of the pattern has different skews compared with other zones, and the length that described tilt detection pattern has makes tracking error signal not produce big departing from.

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