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:
Nov. 25, 2008
Filed:
Aug. 30, 2004
Masashi Kuwahara, Ibaraki, JP;
Takayuki Shima, Ibaraki, JP;
Junji Tominaga, Ibaraki, JP;
Takashi Kikukawa, Tokyo, JP;
Narutoshi Fukuzawa, Tokyo, JP;
Tatsuhiro Kobayashi, Tokyo, JP;
Masashi Kuwahara, Ibaraki, JP;
Takayuki Shima, Ibaraki, JP;
Junji Tominaga, Ibaraki, JP;
Takashi Kikukawa, Tokyo, JP;
Narutoshi Fukuzawa, Tokyo, JP;
Tatsuhiro Kobayashi, Tokyo, JP;
National Institute of Advanced Industrial Science and Technology, Tokyo, JP;
TDK Corporation, Tokyo, JP;
Abstract
A method for reproducing data according to the present invention is adapted for reproducing data recorded in an optical recording disc including a multi-layered body formed by forming a decomposition reaction layer containing noble metal oxide as a primary component and a light absorption layer so as to sandwich a dielectric layer therebetween by irradiating a laser beam onto the optical recording disc and forming a recording mark train including at least one of a recording mark having a length shorter than a resolution limit and a blank region having a length shorter than the resolution limit therein, and is constituted by changing the read power Pr of the laser beam in accordance with a readout linear velocity at which data are to be reproduced from the optical recording disc. According to the thus constituted method for reproducing data, even in the case where the length of a recording mark or the length of a blank region between neighboring recording marks is shorter than the resolution limit, it is possible to record and reproduce a recording mark train including these recording marks and the blank regions. Therefore, this method can be applied to an optical recording medium whose storage capacity is markedly increased.