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    • 8. 发明授权
    • Magneto-optic recording medium, magneto-optic recording system and
magneto-optic recording method
    • 磁光记录介质,磁光记录系统和磁光记录方法
    • US5197048A
    • 1993-03-23
    • US770602
    • 1991-10-03
    • Kyosuke YoshimotoOsamu ItoKunimaro TanakaKoichi TakeuchiIsao WatanabeKazuhiko Tsutsumi
    • Kyosuke YoshimotoOsamu ItoKunimaro TanakaKoichi TakeuchiIsao WatanabeKazuhiko Tsutsumi
    • G11B13/04
    • G11B13/04
    • A magneto-optic recording medium has a cartridge provided with a magnetization direction indicating portion for indicating the direction of magnetization of a second magnetic layer. Alternatively, the direction of magnetization of the second magnetic layer is recorded in advance in the first magnetic layer. The direction of magnetization of the second magnetic layer indicated or recorded is detected and recognized. A magnetic field oriented in an opposite direction to the direction of magnetization detected is imparted to the magneto-optic recording medium. Alternatively, predetermined information is recorded in the first magnetic layer, the direction of magnetization of the second magnetic layer is detected on the basis of a signal reproducing that information, and the direction of a magnetic field to be applied to the magneto-optic recording medium is set on the basis of the direction of magnetization thus detected. In addition, the direction of the magnetic field to be applied to the magneto-optic recording medium is set and the output of a light beam is changed on the basis of the direction of the second magnetic layer detected.
    • 磁光记录介质具有带有用于指示第二磁性层的磁化方向的磁化方向指示部的盒。 或者,第二磁性层的磁化方向预先记录在第一磁性层中。 检测并识别表示或记录的第二磁性层的磁化方向。 向磁光记录介质赋予与所检测的磁化方向相反的方向取向的磁场。 或者,预定信息被记录在第一磁性层中,基于再现该信息的信号和施加到磁​​光记录介质的磁场的方向来检测第二磁性层的磁化方向 基于这样检测的磁化方向设定。 此外,设置施加到磁光记录介质的磁场的方向,并且基于检测到的第二磁性层的方向改变光束的输出。
    • 9. 发明申请
    • Optical disk and optical disk drive device
    • 光盘和光盘驱动器
    • US20080008055A1
    • 2008-01-10
    • US11822404
    • 2007-07-05
    • Kyosuke YoshimotoMahesh RaoHiroyuki OhataKazuhiko NakaneTeruo FurukawaJunichi KondoMasafumi Ototake
    • Kyosuke YoshimotoMahesh RaoHiroyuki OhataKazuhiko NakaneTeruo FurukawaJunichi KondoMasafumi Ototake
    • G11B21/08
    • G11B7/0079G11B7/00745
    • An optical disk physical has a recording region divided into zones, each zone including physical tracks adjacent to each other. An integer number of sectors are provided in each physical track. The angular recording density is higher in the more outward zones such that the linear recording density is substantially constant throughout the recording region, and logical tracks are formed of a predetermined number of sectors. independent of the physical tracks. The conversion between the logical track and sector addresses read from the disk and the linear logical addresses supplied from a host device is easy. The addresses written in headers of the sectors in the logical track in which data are actually recorded, including substitute sectors used in place of defect sectors, are preferably consecutive to further facilitate the conversion between the logical track and sector addresses read from the disk and the linear logical addresses supplied from the host device. Each of the zones can be set to serve as any of the different types of recording area, independently of other zones.
    • 光盘物理上具有划分成区域的记录区域,每个区域包括彼此相邻的物理轨道。 在每个物理轨道中提供整数个扇区。 在更向外的区域中角度记录密度较高,使得整个记录区域的线性记录密度基本恒定,并且逻辑磁道由预定数量的扇区形成。 独立于物理轨道。 从磁盘读取的逻辑磁道和扇区地址与从主机设备提供的线性逻辑地址之间的转换很容易。 写入数据实际记录的逻辑磁道中的扇区头部的地址,包括用于代替缺陷扇区的替代扇区,优选地是连续的,以进一步促进从盘读取的逻辑磁道和扇区地址之间的转换 从主机设备提供的线性逻辑地址。 每个区域可以设置为独立于其他区域,用作任何不同类型的记录区域。