Dynamic information storage or retrieval – Storage or retrieval by simultaneous application of diverse... – Magnetic field and light beam
Patent
1990-04-17
1994-06-14
LaRoche, Eugene R.
Dynamic information storage or retrieval
Storage or retrieval by simultaneous application of diverse...
Magnetic field and light beam
369 47, 369 48, 369 59, 369116, G11B 1304
Patent
active
053216725
ABSTRACT:
A magneto-optical recording device for radiating a laser beam according to recording information onto a magneto-optical recording medium having an easy axis of magnetization in a direction perpendicular to a film face of the recording medium itself to form a reversed domain and record information, which forms a reversed domain by radiating a laser beam and moves the position of the reversed domain to record information. In an embodiment of the present invention, it becomes possible to over-write new information without erasing beforehand information already recorded by only controlling the intensity, pulse width, radiation position and radiation time of the laser beam without providing a special bias magnetic field for reversing the magnetic field.
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Anzai Yumiko
Kirino Fumiyoshi
Miyamoto Harukazu
Niihara Toshio
Ohta Norio
Glembocki Christopher R.
Hitachi , Ltd.
LaRoche Eugene R.
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