Optical recording and reproducing apparatus

Details Optical recording and reproducing apparatus Optical recording and reproducing apparatus

2005-12-05

2009-06-16

Young, Wayne R (Department: 2627)

Dynamic information storage or retrieval

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

Mechanism control by the control signal

C369S047520

Reexamination Certificate

active

07548496

ABSTRACT:
An optimum power set value Pwp1for Layer1obtained by an OPC is used as an initial value Pw21of the OPC for Layer2. At this time, an inclination Ia is obtained from an approximation line of a β value for Layer1(recording power to the β value) obtained by the OPC. From the β value obtained by performing a test recording at the initial value Pw21and the inclination Ia, an approximation line of a β value for Layer2(recording power to the β value) is obtained. Then, on the obtained approximation line, a laser power for providing a target β value (βt) is obtained, and set as an optimum power Pwp2for Layer2. Thus, an optimum power setting conforming to characteristics of a disc can be performed. As a result, setting the optimum power for Layer2can be performed more smoothly and quickly.

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1stOffice Action issued Apr. 13, 2007 in Corresponding Chinese Patent Application No. 200510129504.4.
2ndOffice Action issued Dec. 14, 2007 in Corresponding Chinese Patent Application No. 200510129504.4.
Office Action mailed Nov. 18, 2008 in Corresponding Japanese Patent Application No. 2004-356595.
Office Action issued Jul. 11, 2008 in Corresponding Chinese Patent Application No. 200510129504.4.

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