System and method of reproducing signals recorded on a magneto-o

Details System and method of reproducing signals recorded on a magneto-o System and method of reproducing signals recorded on a magneto-o

1991-12-21

1993-08-31

Pascal, Robert J.

Dynamic information storage or retrieval

Storage or retrieval by simultaneous application of diverse...

Magnetic field and light beam

369110, 360 59, G11B 1100

Patent

active

052415201

ABSTRACT:
A magneto-optical recording medium has a multi-layer magnetic film structure comprising a reproducing layer, an intermediate layer, and a record holding layer. These layers are magnetically coupled to one another. The recording medium is irradiated with a laser beam and appropriate magnetic fields are provided such that in a area of a spot of the laser beam on the recording medium, first, second and third regions are formed as a result of the temperature distribution within the laser beam spot. The first and third regions act as masking regions, with the second region between the first and third regions being a region from which magnetic signals stored in the record hold layer are transferred to the reproducing layer and are read out from the reproducing layer.

REFERENCES:
patent: 4932012 (1990-06-01), Kobayashi
patent: 5018119 (1991-05-01), Aratani et al.
patent: 5168482 (1992-12-01), Aratani et al.
JEE Journal of Electronic Engineering, May 28, 1991, No. 293, "Unique MO Disk Attains Super Resolution", by Katsuhisa Aratani et al, pp. 74-76.

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