Overwrite capable magnetooptial recording apparatus

Details Overwrite capable magnetooptial recording apparatus Overwrite capable magnetooptial recording apparatus

1993-07-16

1995-12-12

Neyzari, Ali

Dynamic information storage or retrieval

Storage or retrieval by simultaneous application of diverse...

Magnetic field and light beam

360 59, 360114, G11B 1100, G11B 1304

Patent

active

054756570

ABSTRACT:
An overwrite capable magnetooptical recording apparatus comprises a moving magnetooptical recording medium to which is applied an initial magnetic field and a laser beam which irradiates the moving medium. The beam intensity is modulated, in accordance with binary data to be recorded, between a high beam intensity level that provides the medium with a first temperature suitable for forming one of a first bit having upward-magnetization and a second bit having downward-magnetization, and a low beam intensity level that provides the medium with a second temperature suitable for forming the other bit. A bias magnetic field is applied to a portion of the medium irradiated by the beam.

REFERENCES:
patent: 4581717 (1986-04-01), Kaneko
patent: 5168482 (1992-12-01), Aratani et al.

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