Adjustment method of optimum write power and optical...

Details Adjustment method of optimum write power and optical... Adjustment method of optimum write power and optical...

2011-07-12

2011-07-12

Huber, Paul (Department: 2627)

Dynamic information storage or retrieval

Control of storage or retrieval operation by a control...

Mechanism control by the control signal

C369S053270

Reexamination Certificate

active

07978576

ABSTRACT:
A power adjustment method in which a modulation index is calculated from reproduced signals of patterns recorded by irradiating light onto an optical information recording medium with a recording power varied and an optimum power of irradiation light is set up using the modulation index. The power adjustment method includes calculating an optimum value PcO of a predetermined correction term Pc using a relation of a value obtained by subtracting the predetermined correction term Pc from the recording power and the modulation index, finding a value Pth of the recording power at which the modulation index becomes substantially zero in the relation of the value obtained by subtracting the optimum value PcO from the recording power and the modulation index, and setting up a value obtained by multiplying the value of Pth by a predetermined constant as a recording power of each of the recording patterns.

REFERENCES:
patent: 2002/0085463 (2002-07-01), Minemura et al.
patent: 2005/0088953 (2005-04-01), Kurokawa et al.
patent: 2005/0099913 (2005-05-01), Suzuki
patent: 2005/0195724 (2005-09-01), Mamiya et al.
patent: 2006/0126467 (2006-06-01), Roh et al.
patent: 2002-298357 (2002-10-01), None
patent: 2005-149538 (2005-06-01), None

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