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    • 1. 发明申请
    • OPTICAL INFORMATION RECORDING AND/OR REPRODUCING APPARATUS, OPTICAL INFORMATION RECORDING AND/OR REPRODUCING METHOD, OPTICAL INFORMATION RECORDING MEDIUM, AND SOLID IMMERSION LENS
    • 光学信息记录和/或复制设备,光学信息记录和/或复制方法,光学信息记录介质和固体透镜
    • US20110069599A1
    • 2011-03-24
    • US12993599
    • 2009-05-18
    • Kenji NarumiMasahiro BirukawaRie KojimaEiichi Ito
    • Kenji NarumiMasahiro BirukawaRie KojimaEiichi Ito
    • G11B7/135G11B7/00G11B7/26
    • G11B7/1387G11B7/094G11B7/0956G11B7/24038G11B7/2578
    • An optical information recording and/or reproducing apparatus comprises: a focusing unit (11) which collects generated near-field light on an optical disc (1); a first detector (17) which receives light reflected by the optical disc (1) and outputs an electric signal according to the quantity of the received light; and a distance control circuit (22) which controls the distance between the focusing unit (11) and a light entrance surface of the optical disc (1), using the electric signal that is output from the first detector (17), and the optical disc (1) has at least N (N is an integer of 2 or greater) number of information layers, and a distance d0 from the light entrance surface to a first information layer which is most distant from the light entrance surface and a distance dn from the light entrance surface to an Nth information layer which is closest to the light entrance surface satisfy the relationship of dn≧d0×(1/25). As a result, servo control can be accurately performed regardless which information layer, out of a plurality of information layers of an optical disc, information is recorded to or reproduced from.
    • 光信息记录和/或再现装置包括:聚焦单元(11),其收集在光盘(1)上产生的近场光; 第一检测器(17),其接收由所述光盘(1)反射的光并根据所接收的光量输出电信号; 以及使用从第一检测器(17)输出的电信号来控制聚焦单元(11)和光盘(1)的光入射面之间的距离的距离控制电路(22),并且光学 盘(1)具有至少N(N是2以上的整数)的信息层数,以及从光入射面到距离光入射面最远的第一信息层的距离d0,距离dn 从光入射面到最靠近光入射面的第N信息层满足dn≥d0×(1/25)的关系。 结果,无论光盘的多个信息层中的哪个信息层的信息被记录或从其再现,都可以精确地执行伺服控制。
    • 2. 发明授权
    • Optical information recording and/or reproducing apparatus, optical information recording and/or reproducing method, optical information recording medium, and solid immersion lens
    • 光学信息记录和/或再现装置,光学信息记录和/或再现方法,光学信息记录介质和固体浸没透镜
    • US08130623B2
    • 2012-03-06
    • US12993599
    • 2009-05-18
    • Kenji NarumiMasahiro BirukawaRie KojimaEiichi Ito
    • Kenji NarumiMasahiro BirukawaRie KojimaEiichi Ito
    • G11B7/135
    • G11B7/1387G11B7/094G11B7/0956G11B7/24038G11B7/2578
    • An optical information recording and/or reproducing apparatus comprises: a focusing unit (11) which collects generated near-field light on an optical disc (1); a first detector (17) which receives light reflected by the optical disc (1) and outputs an electric signal according to the quantity of the received light; and a distance control circuit (22) which controls the distance between the focusing unit (11) and a light entrance surface of the optical disc (1), using the electric signal that is output from the first detector (17), and the optical disc (1) has at least N (N is an integer of 2 or greater) number of information layers, and a distance d0 from the light entrance surface to a first information layer which is most distant from the light entrance surface and a distance dn from the light entrance surface to an Nth information layer which is closest to the light entrance surface satisfy the relationship of dn≧d0×(1/25). As a result, servo control can be accurately performed regardless which information layer, out of a plurality of information layers of an optical disc, information is recorded to or reproduced from.
    • 光信息记录和/或再现装置包括:聚焦单元(11),其收集在光盘(1)上产生的近场光; 第一检测器(17),其接收由所述光盘(1)反射的光并根据所接收的光量输出电信号; 以及使用从第一检测器(17)输出的电信号来控制聚焦单元(11)和光盘(1)的光入射面之间的距离的距离控制电路(22),并且光学 盘(1)具有至少N(N是2以上的整数)的信息层数,以及从光入射面到距离光入射面最远的第一信息层的距离d0,距离dn 从光入射面到最靠近光入射面的第N信息层满足dn≥d0×(1/25)的关系。 结果,无论光盘的多个信息层中的哪个信息层的信息被记录或从其再现,都可以精确地执行伺服控制。