Is a
Patent attributes
Current Assignee
0
Patent Jurisdiction
Patent Number
Patent Inventor Names
Hirotaka Miyamoto0
Toshihiro Horigome0
Kunihiko Hayashi0
Kimihiro Saito0
Date of Patent
July 12, 2011
0Patent Application Number
123629270
Date Filed
January 30, 2009
0Patent Primary Examiner
Patent abstract
A focus control section first performs a reference focus control process in which a reference optical beam is focused on a reference layer of an optical disc according to the result of receiving a reference reflection optical beam, and then switches from the reference focus control process to an information focus control process in which an information optical beam is focused on a mark layer of the optical disc according to the result of receiving an information reflection optical beam.
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