发明名称 |
Recording and reproducing device for magneto-optical card. |
摘要 |
<p>The device comprises an optical head (2) for irradiating a magneto-optical recording medium of an magneto-optical card (1) taken into the device with laser beam, a magnet field generator (6) for applying a biased magnetic field to said magneto-optical recording medium and an optical system manipulating mechanism for the optical system of the above-mentioned optical head for varying the spot irradiated by the laser beam, wherein the optical head is fixed to the main frame of the device, the magneto-optical card is supported where it is irradiated by the laser beam emitted from the optical head, this magneto-optical card is moved horizontally in a plane parallel to the surface of the magneto-optical card for rough searching and then a part (7) or the whole of the magnetic field generator (6) is moved to come into contact with the magneto-optical card to stop the vibration of the magneto-optical card and then the spot to be irradiated by the laser beam is varied by means of the optical system of the optical head for access to the magneto-optical card to be done thereby.</p> |
申请公布号 |
EP0323232(A2) |
申请公布日期 |
1989.07.05 |
申请号 |
EP19880312367 |
申请日期 |
1988.12.28 |
申请人 |
SHARP KABUSHIKI KAISHA |
发明人 |
TAKAHASHI, AKIRA;MURAKAMI, YOSHITERU;NAKAYAMA, JUNICHIRO;OHTA, KENJI;KATAYAMA, HIROYUKI;MIEDA, MICHINOBU |
分类号 |
G11B11/10;G11B7/0033;G11B11/105;G11B17/34 |
主分类号 |
G11B11/10 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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