Recording apparatus using magneto-optical effect including contr

Details Recording apparatus using magneto-optical effect including contr Recording apparatus using magneto-optical effect including contr

1990-11-05

1993-04-06

Nguyen, Hoa

Dynamic information storage or retrieval

Storage or retrieval by simultaneous application of diverse...

Magnetic field and light beam

360 59, 360114, G11B 1304, G11B 1112

Patent

active

052009351

ABSTRACT:
In a recording apparatus employing a magneto-optical effect, and in which a light beam irradiates a region of a magneto-optical disc while a magnetic field acts on the disc at such region and is modulated by coded data in accordance with a predetermined modulation system; the light beam is intermittently energized by drive pulses, and the energizing of the light beam is inhibited at times corresponding to transitions in the coded data when the ratio Tmin/Tw is greater than 1, in which Tmin is the minimum length between transitions in the coded data and Tw is a window margin for the modulation system employed for modulating the magnetic field.

REFERENCES:
patent: 4998231 (1991-03-01), Watanabe et al.

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