Dynamic information storage or retrieval – Storage medium structure – Optical track structure
Reexamination Certificate
2011-01-11
2011-01-11
Edun, Muhammad N (Department: 2627)
Dynamic information storage or retrieval
Storage medium structure
Optical track structure
C369S275100, C369S283000, C369S053200
Reexamination Certificate
active
07869339
ABSTRACT:
According to one embodiment, single-sided dual-layer recordable disc100may be used. Information recording is performed by forming mark and space portions on data area DA using modulated laser power. Pp denotes the maximum laser power or peak power for forming the mark portion, and Pb denotes the bias power for forming the space portion. Power ratio Pb/Pp is calculated for each of recording layers L0and L1. Information is recorded on any of the recording layers L0and L1based on the result of calculation. Here, the calculated power ratio Pb/Pp changes among the recording layers L0and L1, thereby optimizing the recording condition for a multi-layer recordable optical disc within relatively short time.
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Ando Hideo
Morishita Naoki
Morita Seiji
Nakamura Naomasa
Ootera Yasuaki
Edun Muhammad N
Kabushiki Kaisha Toshiba
Oblon, Spivak McClelland, Maier & Neustadt, L.L.P.
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