Optical disc device and laser power control method

Details Optical disc device and laser power control method Optical disc device and laser power control method

2009-04-21

2011-11-08

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, C369S053300

Reexamination Certificate

active

08054720

ABSTRACT:
An optical disk apparatus according to the present invention generates a divided clock signal by dividing a recording clock signal, and based on the divided clock signal, determines a test emission pattern for test recording which is used for controlling the power of a light beam that is output from an emission section. When the linear velocity at recording changes, the division ratio is adjusted in a direction of reducing a change in frequency of the divided clock signal. In an optical disk apparatus which performs laser power control by conducting a test emission with multipulses in a test area, a good detection accuracy of a multi-pulse average value can be maintained even at high x-speeds.

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International Search Report for corresponding application No. PCT/JP2009/001817 dated Jul. 28, 2009.

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