Dynamic information storage or retrieval – Storage or retrieval by simultaneous application of diverse... – Magnetic field and light beam
Patent
1988-09-23
1991-08-27
Levy, Stuart S.
Dynamic information storage or retrieval
Storage or retrieval by simultaneous application of diverse...
Magnetic field and light beam
369 54, 369 58, 360 59, 360114, G11B 1304, G11B 1112
Patent
active
050439600
ABSTRACT:
According to the present invention, the apparatus is provided with a single laser light source and arranged so that light from the laser light source is divided into a plurality of beams by a grating and the plurality of beams are converged to form a plurality of light spots on a recording film by an optical system, whereby in writing information onto a recording film, overwriting to perform erasing and writing at the same time is carried out and an error check on the recorded information is performed in real time while a magnetic field which is polarity-inverted or intensity-modulated in accordance with the recording information is applied to the recording film.
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patent: 4730289 (1988-03-01), Saitoh et al.
patent: 4805043 (1989-02-01), Doyle
Hartmann et al, "Erasable Magneto-Optical Recording Media", IEEE Transactions on Magnetics, vol. MAG 20, No. 5, p. 1013, 1984.
Nakao Takeshi
Ojima Masahiro
Hitachi , Ltd.
Levy Stuart S.
Nguyen Hoa
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