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    • 4. 发明公开
    • OPTICAL RECORDING/REPRODUCING METHOD AND OPTICAL RECORDING MEDIUM
    • 选择AUFZEICHNUNGS- / WIEDERGABEVERFAHREN UND OPTISCHES AUFZEICHNUNGSMEDIUM
    • EP1469460A4
    • 2008-12-24
    • EP03737436
    • 2003-01-22
    • SONY CORP
    • SABI YUICHIIWAMURA TAKASHIOYAMADA MITSUAKITAMADA SAKUYA
    • G11B7/004G11B7/00G11B7/005G11B7/24G11B7/24038G11B7/246G11B7/0045
    • G11B7/24038G11B7/0051G11B7/0052G11B7/24G11B2007/0013
    • An optical recording medium having two or more information recording layers in which information is recorded at high recording density. The incidence of light on the information recording layer disposed far from the top layer through which light enters and the returning light from the information recording layer can be detected at high efficiency. The recording/reproducing characteristics are favorable. An optical recording/reproducing method for at least reproducing/recording information from/on this optical recording medium is also disclosed. The optical recording medium (10) comprises information recording layers (21, 22) between a first major surface on which light can be incident and a second major surface opposed to the first major surface. The first information recording layer (21) nearest to the second major surface is a phase-modulation information recording layer, and the second information recording layer (22) is a reflectance-modulation information recording layer. Information is reproduced or recorded from or in the first information recording medium (21) of the optical recording medium (10) by a phase modulation method, and information is reproduced or recorded from or in the second information recording layer (22) by a reflectance modulation method.
    • 一种具有两个或更多个信息记录层的光记录介质,其中以高记录密度记录信息。 可以高效地检测远离光入射的顶层设置的信息记录层上的光入射和来自信息记录层的返回光。 记录/再现特性是有利的。 还公开了一种用于至少从该光学记录介质再现/记录信息的光学记录/再现方法。 光记录介质(10)包括信息记录层(21,22),位于光可以入射的第一主表面和与第一主表面相对的第二主表面之间。 最靠近第二主表面的第一信息记录层(21)是相位调制信息记录层,第二信息记录层(22)是反射率调制信息记录层。 通过相位调制方法从光记录介质(10)的第一信息记录介质(21)再现或记录信息,并且通过反射率从第二信息记录层(22)或在第二信息记录层 调制方法。