Dynamic information storage or retrieval – Control of storage or retrieval operation by a control... – Mechanism control by the control signal
Reexamination Certificate
2004-08-30
2008-11-25
Tran, Thang V (Department: 2627)
Dynamic information storage or retrieval
Control of storage or retrieval operation by a control...
Mechanism control by the control signal
Reexamination Certificate
active
07457215
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.
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Extended Abstracts(The 61thAutumn Meeting, 2003); The Japan Society of Applied Physcis No. 3, Aug. 30-Sep. 2, 2003, JSAP Catalog No. AP 031129-03, 5 pg.
Fukuzawa Narutoshi
Kikukawa Takashi
Kobayashi Tatsuhiro
Kuwahara Masashi
Shima Takayuki
National Institute of Advanced Industrial Science and Technology
Seed IP Law Group PLLC
TDK Corporation
Tran Thang V
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