发明名称 |
Magneto-optical recording system utilizing a leakage magnetic field of focusing actuator |
摘要 |
In a magneto-optical file memory wherein a storage medium having a vertical magnetic film is irradiated with a laser beam to reverse a magnetization direction of the magnetic film, thereby to write and/or erase information, and a rotation of polarizable face of reflected light from the storage medium is detected, thereby to reproduce information; a magneto-optical file memory wherein a sense of a leakage magnetic field of an actuator which controls an optical system for condensing the laser beam on the storage medium is set to be the same as a sense of initial magnetization of the magnetic film of the storage medium.
|
申请公布号 |
US4672594(A) |
申请公布日期 |
1987.06.09 |
申请号 |
US19850701165 |
申请日期 |
1985.02.13 |
申请人 |
HITACHI, LTD. |
发明人 |
KATO, TSUYOSHI;OJIMA, MASAHIRO;NIIHARA, TOSHIO |
分类号 |
G11B5/02;G11B11/10;G11B11/105;(IPC1-7):G11B5/02 |
主分类号 |
G11B5/02 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|