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    • 1. 发明申请
    • OPTICAL RECORDING MEDIUM AND METHOD FOR REPRODUCING THE SAME
    • 光学记录介质及其再现方法
    • US20100074084A1
    • 2010-03-25
    • US12451526
    • 2008-04-16
    • Koji MishimaTsutomu AoyamaTakashi Kikukawa
    • Koji MishimaTsutomu AoyamaTakashi Kikukawa
    • G11B7/00
    • G11B7/243G11B7/24038G11B7/259G11B2007/24312G11B2007/24314G11B2007/2432G11B2007/25706G11B2007/25708G11B2007/25713G11B2007/25715
    • An optical recording medium which includes three or more information layers and has a higher stack density of information layers than before in the direction of thickness while reducing crosstalk during reproduction, and a method for reading the optical recording medium are provided. The optical recording medium has a three-layer structure which includes a substrate, a first information layer, a first spacer layer, a second information layer, a second spacer layer, a third information layer, and a cover layer thinner than the substrate, with these layers being stacked in that order over the substrate, wherein the following Equation (I) is satisfied: (R2×R3×R2)/R1≦0.0032   Equation (I) where R1 is the reflectivity of the first information layer, R2 is the reflectivity of the second information layer, and R3 is the reflectivity of the third information layer, and the first spacer layer and the second spacer layer are equal to each other in thickness.
    • 提供了一种光记录介质,其包括三个或更多个信息层,并且在减小再现期间的串扰的同时,在厚度方向上具有比以前更高的堆叠密度的信息层,以及读取光学记录介质的方法。 光记录介质具有三层结构,其包括基板,第一信息层,第一间隔层,第二信息层,第二间隔层,第三信息层和比基板更薄的覆盖层, 这些层在衬底上按顺序层叠,其中满足以下等式(I):(R2×R3×R2)/R1≦̸0.0032等式(I)其中R1是第一信息层的反射率,R2是 第二信息层的反射率,R3是第三信息层的反射率,第一间隔层和第二间隔层的厚度相等。
    • 3. 发明授权
    • Optical recording medium and method for reproducing the same
    • 光记录介质及其再现方法
    • US08238214B2
    • 2012-08-07
    • US12451526
    • 2008-04-16
    • Koji MishimaTsutomu AoyamaTakashi Kikukawa
    • Koji MishimaTsutomu AoyamaTakashi Kikukawa
    • G11B7/00
    • G11B7/243G11B7/24038G11B7/259G11B2007/24312G11B2007/24314G11B2007/2432G11B2007/25706G11B2007/25708G11B2007/25713G11B2007/25715
    • An optical recording medium which includes three or more information layers and has a higher stack density of information layers than before in the direction of thickness while reducing crosstalk during reproduction, and a method for reading the optical recording medium are provided. The optical recording medium has a three-layer structure which includes a substrate, a first information layer, a first spacer layer, a second information layer, a second spacer layer, a third information layer, and a cover layer thinner than the substrate, with these layers being stacked in that order over the substrate, wherein the following Equation (I) is satisfied: (R2×R3×R2)/R1≦0.0032  Equation (I) where R1 is the reflectivity of the first information layer, R2 is the reflectivity of the second information layer, and R3 is the reflectivity of the third information layer, and the first spacer layer and the second spacer layer are equal to each other in thickness.
    • 提供了一种光记录介质,其包括三个或更多个信息层,并且在减小再现期间的串扰的同时,在厚度方向上具有比以前更高的堆叠密度的信息层,以及读取光学记录介质的方法。 光记录介质具有三层结构,其包括基板,第一信息层,第一间隔层,第二信息层,第二间隔层,第三信息层和比基板更薄的覆盖层, 这些层在衬底上按顺序层叠,其中满足以下等式(I):(R2×R3×R2)/R1≦̸0.0032等式(I)其中R1是第一信息层的反射率,R2是 第二信息层的反射率,R3是第三信息层的反射率,第一间隔层和第二间隔层的厚度相等。