Optical information recording and reproducing medium

Details Optical information recording and reproducing medium Optical information recording and reproducing medium

2003-08-21

2009-02-10

Agustin, Peter Vincent (Department: 2627)

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

C369S094000

Reexamination Certificate

active

07489620

ABSTRACT:
Optical information recording and reproducing medium10has two recording layers of first and second recording layers12and14, from a laser beam incident surface side. In each control area21, recording layer management information containing at least information indicating recording states of a plurality of areas into which the inside of data recording area22of each recording layer is divided is recorded. When recording or reproducing is performed on the second recording layer14, the recording layer management information is checked, and a laser beam output is changed based on a recording state of an area corresponding to the first recording layer12.

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