公开(公告)号：US4858212A

公开(公告)日：1989-08-15

申请号：US222422

申请日：1988-07-20

申请人： Akira Takahashi ,  Yoshiteru Murakami ,  Michinobu Mieda ,  Tomoyuki Miyake ,  Kenji Ohta

发明人： Akira Takahashi ,  Yoshiteru Murakami ,  Michinobu Mieda ,  Tomoyuki Miyake ,  Kenji Ohta

IPC分类号： G11B5/02 ,  G11B11/10 ,  G11B11/105

CPC分类号： G11B11/10519 ,  G11B11/10515

摘要： A magnetooptical disc is initialized by reversing the direction of magnetization at fixed intervals and the direction of external magnetic field applied to it is reversed for each overwrite recording by exposure to laser light.

摘要翻译： 通过以固定的间隔反转磁化方向来初始化磁光盘，并且通过暴露于激光对每个重写记录施加到其上的外部磁场的方向相反。

公开(公告)号：US4853912A

公开(公告)日：1989-08-01

申请号：US131327

申请日：1987-12-08

申请人： Hideki Akasaka ,  Masatoshi Sato

发明人： Hideki Akasaka ,  Masatoshi Sato

IPC分类号： G11B11/10 ,  G11B11/105

CPC分类号： G11B11/10586 ,  G11B11/10506 ,  G11B11/10519 ,  G11B11/10584

摘要： A magneto-optical recording process is produced by irradiating a recording track of a recording medium, in the course of movement thereof, with a main light beam of intensity sufficient for heating the medium to a temperature at which the coercive force thereof is reduced to zero or a very small value in a continuous manner during the recording operation and irradiating a separating area with a subsidiary beam of a modulated intensity, thereby modulating the vertical magnetization of said separating area. A floating magnetic field generated by the thus modulated vertical magnetization generates magnetic fields of mutually different directions, thus forming a record bit on the recording track.

摘要翻译： 磁光记录过程是通过在其移动过程中用记录介质的记录轨道照射强度足以将介质加热至其矫顽力降至零的温度的主光束来产生的 或在记录操作期间以连续的方式具有非常小的值，并且利用调制强度的辅助光束照射分离区域，从而调制所述分离区域的垂直磁化。 由这样调制的垂直磁化产生的浮动磁场产生相互不同方向的磁场，从而在记录磁道上形成记录位。