Optical disk recording and reproducing apparatus having faster r

Details Optical disk recording and reproducing apparatus having faster r Optical disk recording and reproducing apparatus having faster r

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

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