Magneto-optical recording and reproducing device using the modul

Details Magneto-optical recording and reproducing device using the modul Magneto-optical recording and reproducing device using the modul

1989-04-20

1991-12-31

Envall, Jr., Roy N.

Dynamic information storage or retrieval

Storage or retrieval by simultaneous application of diverse...

Magnetic field and light beam

369100, 360114, G11B 1114

Patent

active

050777149

ABSTRACT:
A magneto-optical recording and reproducing device for recording and reproducing data determined by negative magnetized areas in a magneto-optical recording medium. The device including a laser beam output level control means for controlling the intensity of a laser beam when recording data on the medium. The device prevents the causes of false signals and incorrect detection influenced by residual negative magnetized domains by increasing laser beam intensity when rewriting positive magnetized areas to erase residual negative magnetized areas.

REFERENCES:
patent: 4712203 (1987-12-01), Saito et al.
patent: 4879703 (1989-11-01), Kaku et al.
patent: 4882718 (1989-11-01), Kyrder et al.
patent: 4982389 (1991-01-01), Nakao et al.
patent: 4985881 (1991-01-01), Saito et al.

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