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    • 6. 发明授权
    • OPTICAL RECORDING MEDIUM, DATA RECORDING METHOD AND DATA REPRODUCING METHOD
    • 优惠价格,日期:
    • EP0441967B1
    • 1996-04-17
    • EP90912463.8
    • 1990-08-22
    • SONY CORPORATION
    • YAMAGAMI, TamotsuSAKO, YoichiroYAMAMOTO, Masanobu
    • G11B7/00G11B7/007G11B7/24G11B11/10
    • G11B27/3027G11B7/00745G11B7/24082G11B11/10504G11B11/10528G11B11/10597G11B13/04G11B20/1217G11B20/1254G11B27/24G11B2020/10546G11B2020/1259G11B2220/218G11B2220/2525G11B2220/2545
    • The optical recording medium has main data recorded on a recording track that has been formed in advance along the track direction, and the recorded data are read out by optical system. Frame synchronising signals based on the same format as the main data format are recorded in advance for each frame that serves as a data recording unit utilising the displacement in the direction of width of the recording track itself, whereby the frame synchronism is easily obtained and the constitution is simplified as a result of using the synchronising circuit in common. The data to be recorded in advance by displacing the track itself in the direction of width include frame synchronising signal as well as any reproduction-only data, in order to increase the recording capacity of the disk. The circuit constitution is simplified by using in common the reproducing circuit for reproducing frame synchronising signals of main data recorded in the track direction of the recording track and the reproducing circuit for reproducing frame synchronising signals of the same format as the main data in the data recorded being displaced in the direction of track width.
    • 光记录介质具有记录在沿磁道方向预先形成的记录磁道上的主数据,并且记录数据由光学系统读出。 基于与主数据格式相同的格式的帧同步信号预先对于利用记录轨道本身的宽度方向的位移而用作数据记录单元的每个帧进行记录,由此容易地获得帧同步,并且 作为共同使用同步电路的结果,简化了结构。 要通过沿着宽度方向移位磁道本身而预先记录的数据包括帧同步信号以及任何再现数据,以便增加磁盘的记录容量。 电路结构通过共同使用用于再现记录在记录磁道的磁道方向上的主数据的帧同步信号的再现电路和用于再现与所记录的数据中的主数据相同格式的帧同步信号的再现电路, 沿轨道宽度的方向移位。
    • 7. 发明公开
    • MAGNETO-OPTICAL RECORDING/REPRODUCING APPARATUS
    • Optisch磁铁专家/维多利亚Vorrichtung。
    • EP0465676A1
    • 1992-01-15
    • EP91903622.8
    • 1991-01-30
    • SONY CORPORATION
    • WATANABE, TetsuYAMAGAMI, Tamotsu
    • G11B11/10
    • G11B11/10532G11B11/10552G11B11/10584G11B11/10597
    • A magneto-optical recording/reproducing apparatus which comprises a first optical system (1) provided with a first objective lens (2), a second optical system (21) provided with a second objective lens (22) having a numerical aperture different from that of the first objective lens, and a magnetic head (19) that is provided close to a magneto-optical recording medium for recording and is driven together with the second objective lens (22) in a body. Even when either of a first and a second magneto-optical recording medium (41, 42) having recording densities different from each other is loaded in the magneto-optical recording/reproducing apparatus, the recording or reproducing thereof is possible. Therefore, the compatibility between the first and the second magneto-optical recording medium (41, 42) is obtained.
    • 一种磁光记录/再现装置,包括设置有第一物镜的第一光学系统(1),具有不同于数值孔径的数值孔径的第二物镜(22)的第二光学系统(21) 以及设置在靠近用于记录的磁光记录介质的磁头(19),并与第二物镜(22)一起被驱动在一体内。 即使在具有彼此不同的记录密度的第一和第二磁光记录介质(41,42)中的任一个被加载到磁光记录/再现装置中,其记录或再现也是可能的。 因此,获得第一和第二磁光记录介质(41,42)之间的兼容性。