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    • 7. 发明授权
    • Optical recording medium and disc cartridge
    • 光记录介质和光盘盒
    • US07305689B2
    • 2007-12-04
    • US10833540
    • 2004-07-15
    • Naohiro NetsuYoshitaka AokiTetsu WatanabeKazuhiko FujiieYasuaki MaedaTakuya Kaeriyama
    • Naohiro NetsuYoshitaka AokiTetsu WatanabeKazuhiko FujiieYasuaki MaedaTakuya Kaeriyama
    • G11B7/24
    • B29C69/001B29C2793/0009B29L2017/005G11B7/007G11B7/24G11B7/24038G11B7/24085G11B11/10508G11B11/10582G11B17/03G11B23/0035G11B23/0307G11B23/0308G11B23/0317
    • An optical recording medium is provided which has a substrate and a signal recording layer provided on the substrate and in which an information signal is recorded in the form of microscopic pits. A light beam is focused on the signal recording layer and some change of the light beam carried by a return light from the signal recording layer is detected to read the information signal recorded on the signal recording layer. The optical recording medium has a diameter of 65 mm or less and a thickness of 0.4 to 0.7 mm. An information signal recording area extends outwardly from a radial position of 12.5 mm or less from the center of the medium. The ratio in area between the information signal recording area and non-signal recording area is 3.4 or more. The storage capacity of this medium is 2 gigabytes or more. The optical recording medium has formed at the center thereof a center hole around which an annular table-abutment convexing to one side of the medium is formed. A magnetic-clamping hub is installed in the center hole and thus the medium is magnetically clamped to a rotation driving mechanism of an optical recording and/or reproducing apparatus. The compactness and high density of recording of the optical recording medium will contribute greatly to a further compact structure of a recording and/or reproducing apparatus in which the medium is to be used.
    • 提供了一种光记录介质,其具有基板和设置在基板上的信号记录层,其中以微观凹坑的形式记录信息信号。 光束聚焦在信号记录层上,并且检测由来自信号记录层的返回光所携带的光束的一些变化,以读取记录在信号记录层上的信息信号。 光记录介质的直径为65mm以下,厚度为0.4〜0.7mm。 信息信号记录区域从介质中心的12.5mm或更小的径向位置向外延伸。 信息信号记录区域与非信号记录区域之间的面积比为3.4以上。 该介质的存储容量为2 GB或更多。 光记录介质在其中心处形成有中心孔,在该中心孔处形成有凸起到介质一侧的环形台面邻接。 磁性夹紧轮毂安装在中心孔中,因此介质被磁力夹紧到光学记录和/或再现装置的旋转驱动机构。 光记录介质的紧凑性和高密度记录对于使用介质的记录和/或再现装置的进一步紧凑结构将有很大的贡献。
    • 9. 发明授权
    • Optical recording medium and disc cartridge
    • 光记录介质和光盘盒
    • US07454771B2
    • 2008-11-18
    • US11925509
    • 2007-10-26
    • Naohiro NetsuYoshitaka AokiTetsu WatanabeKazuhiko FujiieYasuaki MaedaTakuya Kaeriyama
    • Naohiro NetsuYoshitaka AokiTetsu WatanabeKazuhiko FujiieYasuaki MaedaTakuya Kaeriyama
    • G11B7/24
    • B29C69/001B29C2793/0009B29L2017/005G11B7/007G11B7/24G11B7/24038G11B7/24085G11B11/10508G11B11/10582G11B17/03G11B23/0035G11B23/0307G11B23/0308G11B23/0317
    • An optical recording medium is provided which has a substrate and a signal recording layer provided on the substrate and in which an information signal is recorded in the form of microscopic pits. A light beam is focused on the signal recording layer and some change of the light beam carried by a return light from the signal recording layer is detected to read the information signal recorded on the signal recording layer. The optical recording medium has a diameter of 65 mm or less and a thickness of 0.4 to 0.7 mm. An information signal recording area extends outwardly from a radial position of 12.5 mm or less from the center of the medium. The ratio in area between the information signal recording area and non-signal recording area is 3.4 or more. The storage capacity of this medium is 2 gigabytes or more. The optical recording medium has formed at the center thereof a center hole around which an annular table-abutment convexing to one side of the medium is formed. A magnetic-clamping hub is installed in the center hole and thus the medium is magnetically clamped to a rotation driving mechanism of an optical recording and/or reproducing apparatus. The compactness and high density of recording of the optical recording medium will contribute greatly to a further compact structure of a recording and/or reproducing apparatus in which the medium is to be used.
    • 提供了一种光记录介质,其具有基板和设置在基板上的信号记录层,其中以微观凹坑的形式记录信息信号。 光束聚焦在信号记录层上,并且检测由来自信号记录层的返回光所携带的光束的一些变化,以读取记录在信号记录层上的信息信号。 光记录介质的直径为65mm以下,厚度为0.4〜0.7mm。 信息信号记录区域从介质中心的12.5mm或更小的径向位置向外延伸。 信息信号记录区域与非信号记录区域之间的面积比为3.4以上。 该介质的存储容量为2 GB或更多。 光记录介质在其中心处形成有中心孔,在该中心孔处形成有凸起到介质一侧的环形台面邻接。 磁性夹紧轮毂安装在中心孔中,因此介质被磁力夹紧到光学记录和/或再现装置的旋转驱动机构。 光记录介质的紧凑性和高密度记录对于使用介质的记录和/或再现装置的进一步紧凑结构将有很大的贡献。