Optical disc apparatus

Details Optical disc apparatus Optical disc apparatus

2005-05-24

2005-05-24

Tran, Thang V. (Department: 2653)

Dynamic information storage or retrieval

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

Mechanism control by the control signal

C369S053190

Reexamination Certificate

active

06898163

ABSTRACT:
An optical disc apparatus for recording test data on a predetermined area of an optical disc under varied recording powers to determine an optimum recording power based on the quality of a signal obtained by reproducing the recorded test data. The test data is recorded under adverse recording conditions so as to evaluate the amount of change in quality of the reproduction signal. In order to create adverse recording conditions, the optical disc is tilted or the laser is defocused. A recording power for which the change in signal quality due to the deteriorated recording conditions is sufficiently small is determined as an optimum recording power capable of providing adequate recording margin.

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patent: 6036285 (1994-02-01), None
patent: 2000-137918 (2000-05-01), None
patent: 2001052351 (2001-02-01), None

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