The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 09, 2009
Filed:
Feb. 13, 2007
Yuichiro Yamamoto, Tokyo, JP;
Shinichi Tatsuta, Tokyo, JP;
Yuji Kubota, Kanagawa, JP;
Akiko Hirao, Chiba, JP;
Kazuki Matsumoto, Kanagawa, JP;
Yuichiro Yamamoto, Tokyo, JP;
Shinichi Tatsuta, Tokyo, JP;
Yuji Kubota, Kanagawa, JP;
Akiko Hirao, Chiba, JP;
Kazuki Matsumoto, Kanagawa, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
An optical-information recording medium includes a substrate that includes a servo surface; an information recording layer laminated on the servo surface of the substrate capable of recording information as a hologram produced by interference between an information beam containing the information and a reference beam; a tracking servo area that is formed in a track direction on the servo surface, and that records therein tracking information for tracking servo control; and a following up servo area that is formed in the track direction on the servo surface, and that is to be irradiated by a beam emitted from an optical-information recording apparatus for recording the information in the information recording layer so as to make the beam follow a rotation of the optical-information recording medium.