Method for selecting optimal recording and erasing powers...

Dynamic information storage or retrieval – Control of storage or retrieval operation by a control... – Mechanism control by the control signal

Reexamination Certificate

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C369S116000

Reexamination Certificate

active

07099249

ABSTRACT:
A method in which, during an optimal power calibration (OPC) process, an optical disk drive performs a plurality of write tests to an optical disk at a plurality of test powers and measures a corresponding plurality of modulation signal strength values of the optical disk for the plurality of write tests to generate a modulation signal strength versus power curve. The method then determines possible gamma lines corresponding to considered powers, and selects a considered power as a target power of the optical disk drive when a possible gamma line is substantially tangential to the modulation signal strength versus power curve at the considered power. According to the method, powers within a domain of the plurality of test powers are considered until a considered power is selected as the target power for the optical disk.

REFERENCES:
patent: 5793737 (1998-08-01), Den Boef
patent: 0762399 (1997-12-01), None
patent: 1111598 (2001-06-01), None
patent: 1111598 (2001-06-01), None
patent: PCT 98/25267 (1998-06-01), None

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