Positioning system for the heads of a magneto-optical data recor

Details Positioning system for the heads of a magneto-optical data recor Positioning system for the heads of a magneto-optical data recor

1990-09-19

1993-03-02

LaRoche, Eugene R.

Dynamic information storage or retrieval

Storage or retrieval by simultaneous application of diverse...

Magnetic field and light beam

369215, G11B 1732

Patent

active

051915626

ABSTRACT:
A device for inscribing and or reading a magneto-optical disc includes a turntable mounted for rotation about an axis of rotation, and an optical unit and a magnetic unit movably mounted opposite to and spaced from each other in a direction parallel to the axis of rotation. The optical unit and magnetic unit are mounted each to be movable in a plane transverse to the rotation axis. The magnetic unit includes a coil on a support which in turn is movably mounted on a displacement body which is radially moveable with respect to the axis. During operation a measurement and control system determines the radial position of the optical unit and the magnetic unit relative to each other in the radial direction, for controlling at least the radial position of the coil of the magnetic unit relative to an objective of the optical units.

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patent: 4956832 (1990-09-01), Miyasaka
patent: 4974222 (1990-11-01), Ishitoya
patent: 5093816 (1992-03-01), Taniguchi et al.

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