Magneto-optical disc recording/reproducing apparatus

Details Magneto-optical disc recording/reproducing apparatus Magneto-optical disc recording/reproducing apparatus

1992-10-26

1994-07-12

Mottola, Steven

Dynamic information storage or retrieval

Storage or retrieval by simultaneous application of diverse...

Magnetic field and light beam

360114, G11B 1100

Patent

active

053295030

ABSTRACT:
A magneto-optical disc recording/reproducing apparatus in which a magneto-optical disc, a disc rotating and driving unit, an optical head device, an external magnetic field generating unit and a controlling device are contained as one in an outer casing. That is, the apparatus includes the disc rotating and driving unit which has a diameter of not more than 67 mm and in which the magneto-optical disc is housed and rotationally driven at a constant angular velocity, the optical head device for radiating a light beam to the magneto-optical disc, the external magnetic field generating unit arranged facing the optical head device with the magneto-optical disc in-between and adapted for applying a perpendicular magnetic field to the magneto-optical disc when recording information signals on the magneto-optical disc, the controlling device for controlling the disc rotating and driving unit, the optical head device and the external magnetic field generating unit and the outer casing having a width of not more than 70 mm, a depth of not more than 100 mm and a height of not more than 25.4 mm and adapted for accommodating the magneto-optical disc, the disc rotating and driving unit, the optical head device, the external magnetic field generating unit and the controlling device, for increasing the capacity for information signals and reducing the apparatus size.

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