Dynamic information storage or retrieval – Control of storage or retrieval operation by a control... – Mechanism control by the control signal
Reexamination Certificate
2006-02-28
2006-02-28
Korzuch, William (Department: 2653)
Dynamic information storage or retrieval
Control of storage or retrieval operation by a control...
Mechanism control by the control signal
C369S047520, C369S013260, C369S053270, C369S059110, C369S116000
Reexamination Certificate
active
07006414
ABSTRACT:
An optical disk device for writing information on an optical disk having an APC part for monitored driving of a laser diode is provided which performs first and second OPCs. An unused partition of a test area and reference power value are read out from the optical disk. APC is turned off if the recording speed exceeds 1×. A first optimum writing power value is obtained by writing on the unused partition by driving the laser diode at a plurality of first test laser power values centered on the reference power value and reading out the information. APC is turned on if the recording speed exceeds 1×. A second optimum writing power value is obtained by writing on a subsequent unused partition by driving the laser diode at a plurality of second test laser power values centered on the first optimum writing power value and reading out the information.
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Chu Kim-Kwok
Dickstein , Shapiro, Morin & Oshinsky, LLP
Korzuch William
Ricoh & Company, Ltd.
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