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:
Jul. 15, 2014
Filed:
Apr. 09, 2012
Kousei Sano, Osaka, JP;
Tatsuya Takaoka, Osaka, JP;
Hidenori Wada, Kyoto, JP;
Keiichi Matsuzaki, Kyoto, JP;
Kousei Sano, Osaka, JP;
Tatsuya Takaoka, Osaka, JP;
Hidenori Wada, Kyoto, JP;
Keiichi Matsuzaki, Kyoto, JP;
Panasonic Corporation, Osaka, JP;
Abstract
An optical disc () has a first mark () disposed at the center of a track, a second mark () disposed away from the center of the track in a tracking direction thereof by a distance b, and disposed away from the first mark () in the direction along the track by a distance L, and a third mark () disposed away from the center of the track in the tracking direction opposite to that of the second mark () by a distance b, and disposed away from the first mark () in the direction along the track by a distance L. The second and third marks () and () generate scattered light depending on the distance between a scattering medium () and each of the marks by irradiating the scattering medium () in an optical information apparatus with light. The distances band bare smaller than 50 nm.