Overwriting photomagnetic recording apparatus having single ligh

Details Overwriting photomagnetic recording apparatus having single ligh Overwriting photomagnetic recording apparatus having single ligh

1987-11-19

1990-04-03

Stephan, Steven L.

Dynamic information storage or retrieval

Storage or retrieval by simultaneous application of diverse...

Magnetic field and light beam

360114, 360 59, G11B 1112, G11B 1304

Patent

active

049146432

ABSTRACT:
An overwriting recorder includes a light intensity modulator for modulating a semiconductor laser beam with a signal to be recorded to obtain a light intensity corresponding to the signal, and at least one fixed-field generator for applying magnetic fields in mutally opposite directions to the disk at two respective positions thereon which are determined by the light intensity of the modulated laser beam. Information can be overwritten on the disk through light modulation.

REFERENCES:
patent: 4543586 (1985-09-01), Parker
patent: 4610009 (1986-09-01), Connell
patent: 4706232 (1987-11-01), Funada et al.
patent: 4771347 (1988-09-01), Horimai et al.

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