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    Magneto-optical recording and reproducing method, magnetooptical memory apparatus
    3.
    发明公开
    Magneto-optical recording and reproducing method, magnetooptical memory apparatus 失效
    磁 - 光记录和再现方法，磁光存储设备和为此的磁光记录介质。

    公开(公告)号：EP0393652A2

    公开(公告)日：1990-10-24

    申请号：EP90107406.2

    申请日：1990-04-19

    申请人： HITACHI, LTD.

    发明人： Kaku, Toshimitsu ,  Nakamura, Shigeru ,  Takahashi, Masahiko ,  Niihara, Toshio ,  Miyamoto, Harukazu ,  Ohta, Norio ,  Nakao, Takeshi ,  Sukeda, Hirofumi ,  Ojima, Masahiro ,  Toyooka, Takashi ,  Suganuma, Tsuneo ,  Kirino, Fumiyoshi ,  Miyamura, Yoshinori

    IPC分类号： G11B11/10 ,  G11B7/24 ,  G11B13/04

    CPC分类号： G11B11/10584 ,  G11B11/10536 ,  G11B11/10545 ,  G11B11/10593

    摘要： A magnetic field of a polarity corresponding to information to be recorded is applied while a recording spot having a high energy is irradiated to a magneto-opti­cal recording medium (1) to record domains representing the information along a track. The recorded domains (106) are read out by a reproducing spot having a lower energy than the recording spot and a high resolution power along the track. A recording head (11) has an optical system (2 - 9) for irradiating the recording spot having the high energy to the magneto-optical recording medium (1) and a magnetic head (12) for applying a magnetic field having a polarity thereof switched in accordance with the informa­tion to be recorded, to an irradiation area of the recor­ding spot, a reproducing head (300) has an optical system for irradiating the reproducing spot having the low energy by a laser beam having a wavelength of not larger than 600 nm and a magneto-optical signal detector for detecting a displacement of a polarization plane of a reflected light of the reproducing spot to read out the recording domains. The magneto-optical recording medium (1) is made of a recording film having a multi-layer structure (101 - 103) of alternate lamination of metal layers and dielec­tric layers.

    摘要翻译： 而具有高能量记录点被照射到磁 - 光记录介质（1）记录表示沿着轨道的信息域的极性对应于要被记录的信息的磁场施加。 所记录的域（106）是由具有比记录点较低的能量和沿轨道的高分辨率功率的再现点被读出。 的记录头（11）具有在用于照射具有高能量的磁 - 光记录介质（1）和磁头（12），用于施加具有它们的极性的磁场的记录点的光学系统（2-9） 在雅舞的信息来切换要被记录到在记录光斑的照射区域，再现头（300）具有到光学系统，用于通过具有不大于600的波长的激光束照射具有低能量的再生光斑 nm，对于检测再现点的反射光的偏振面的位移来读出所述记录域的磁光信号检测器。 磁 - 光记录介质（1）是由具有金属层和电介质层交替层叠的多层结构（101〜103）的记录的电影。