Dynamic information storage or retrieval – Storage or retrieval by simultaneous application of diverse... – Magnetic field and light beam
Patent
1990-01-22
1991-09-17
Levy, Stuart S.
Dynamic information storage or retrieval
Storage or retrieval by simultaneous application of diverse...
Magnetic field and light beam
360 7301, 360 7303, 369189, 369239, G11B 1304
Patent
active
050501453
ABSTRACT:
An optomagnetic disk recording and reproducing apparatus includes an optomagnetic disk having a vertical magnetic film capable of recording and reproducing an information signal, a recording and reproducing head unit for recording an information signal in the optomagnetic disk and reproducing an information signal recorded in the optomagnetic disk, a spindle motor for rotationally driving the optomagnetic disk, and means for controlling the spindle motor such that a rotational speed of the optomagnetic disk upon reproducing of an information signal recorded in the optomagnetic disk performed by the recording and reproducing head unit is set higher than the rotational speed of the optomagnetic disk upon recording of an information signal in the optomagnetic disk performed by the recording and reproducing head unit.
REFERENCES:
patent: 3709503 (1973-01-01), Kamio et al.
patent: 3855424 (1974-12-01), Tharmaratnam et al.
patent: 4710825 (1987-12-01), Okita et al.
patent: 4733385 (1988-03-01), Henmi et al.
patent: 4789975 (1988-12-01), Taniyama
Eslinger Lewis H.
Levy Stuart S.
Maioli Jay H.
Nguyen Hoa
Sony Corporation
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