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:
Aug. 15, 2006
Filed:
Jul. 12, 2005
Harukazu Miyamoto, Kodaira, JP;
Hirofumi Sukeda, Tokorozawa, JP;
Motoyasu Terao, Tokyo, JP;
Hiroyuki Minemura, Yokohama, JP;
Tetsuo Andou, Kokubunji, JP;
Harukazu Miyamoto, Kodaira, JP;
Hirofumi Sukeda, Tokorozawa, JP;
Motoyasu Terao, Tokyo, JP;
Hiroyuki Minemura, Yokohama, JP;
Tetsuo Andou, Kokubunji, JP;
Hitachi, Ltd., Tokyo, JP;
Hitachi Maxell, Ltd., Ibaraki, JP;
Abstract
A reproducing method for reproducing information from an optical recording medium having an aligned prepit portion straddled on a plurality of tracks in a radial direction, the prepit portion including first and second prepit portions divided in a track direction and arranged on a boundary line of the respective tracks. The first and second prepit portions each have address information prepits arranged at every two-track pitch in the radial direction, and the address information prepit of the first and second prepit portions are arranged with one track displaced in the radial direction. A trailing end of an end prepit of the first prepit portion is aligned with the radial direction. The method includes irradiating an optical spot on the medium, detecting a reflected beam from the medium, and reproducing information on the medium by using a signal obtained by the reflected beam.