G - Physics – 11 – B
Patent
G - Physics
11
B
352/33.3
G11B 11/10 (2006.01) G11B 7/0033 (2006.01) G11B 11/105 (2006.01) G11B 17/34 (2006.01)
Patent
CA 1316599
ABSTRACT OF THE DISCLOSURE A recording and reproducing device for a magneto- optical card is revealed, which comprises an optical head for irradiating a magneto-optical recording medium of an magneto-optical card taken into the device with laser beam, a magnet field generator 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 or the whole of the magnetic field generator 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. 31
586507
Katayama Hiroyuki
Mieda Michinobu
Murakami Yoshiteru
Nakayama Junichiro
Ohta Kenji
G. Ronald Bell & Associates
Sharp Kabushiki Kaisha
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