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Mark forming apparatus, method of forming laser mark on optical disk, reproducing apparatus, optical disk and method of producing optical disk

  • US RE39,653 E1
  • Filed: 06/02/2000
  • Issued: 05/22/2007
  • Est. Priority Date: 11/17/1994
  • Status: Expired due to Term
First Claim
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1. A marking forming apparatus comprising:

  • an optical disk having pits indicating data signals readable by light radiation;

    at least one reflective film formed on the pits;

    marking forming means for applying at least one marking to at least one the reflective film formed to a on the disk, the marking being a low-reflective marking;

    marking position detecting means for detecting at least one position of said marking; and

    position information output means for outputting said detected position as position information of said marking.

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