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    • 10. 发明公开
    • Multi-layered optical disk and its recording and reproducing methods
    • 多层光盘及其记录和再现方法
    • EP2346038A1
    • 2011-07-20
    • EP11002644.0
    • 2009-09-23
    • Hitachi Consumer Electronics Co. Ltd.
    • Miyamoto, HarukazuWatanabe, KoichiNagai, YutakaNishimura, KoichiroYasukawa, Takakiyo
    • G11B7/007G11B7/125G11B7/24
    • G11B7/00736G11B7/1267G11B7/24038G11B2007/0013
    • A multi-layered optical disk has three or more recordable or rewritable information recording layers including at least a first recording layer and a second recording layer located on the side nearer to the light incident surface than the first recording layer, a first test area configured by a plurality of segments in the first recording layer and a second test area configured by a plurality of segments in the second recording layer. The disk further has a specific area in which there is recorded information used to determine whether or not the respective segments in the first test area can be used. The purpose of this arrangement is to enable recording in securing sufficient test areas without reducing user data areas, and suitably controlling the power of laser beam irradiated onto each of the layers. It is thereby possible to improve the quality of recording and the reliability of the recorded data.
    • 多层光盘具有三个或更多个可记录或可重写信息记录层,第一测试区域由第一记录层和第二记录层组成,第一测试区域由第一记录层和第二记录层组成,第一记录层和第二记录层位于比第一记录层更靠近光入射表面的一侧, 在第一记录层中的多个段和由第二记录层中的多个段构成的第二测试区。 该盘还具有一个特定区域,其中记录有用于确定第一测试区域中的各个区段是否可以被使用的信息。 这种安排的目的是使记录能够确保足够的测试区域而不减少用户数据区域,并适当地控制照射到每个层上的激光束的功率。 由此可以改善记录质量和记录数据的可靠性。