Magneto-optical recording medium having pairs of mutually corres

Details Magneto-optical recording medium having pairs of mutually corres Magneto-optical recording medium having pairs of mutually corres

1987-07-06

1989-02-21

Cardillo, Raymond F.

Dynamic information storage or retrieval

Storage or retrieval by simultaneous application of diverse...

Magnetic field and light beam

360114, 360 59, 365122, G11B 1114, G11B 1304

Patent

active

048072044

ABSTRACT:
A magneto-optical recording apparatus for writing information on a magneto-optical recording medium having at least one pair of magneto-optical storage layers each pair consisting of a first and a second storage layer which have at least one pair of corresponding recording segments, each pair of mutually corresponding recording segments consisting of a first recording segment provided on the first storage layer and a second recording segment provided on the second storage layer. The apparatus includes a first and a second writing/erasing head for writing and erasing information on the first and second storage layers, and a recording controller for activating one of the first and second writing/erasing heads to erase previous information already recorded on corresponding one of the first and second recording segments, while activating the other head to write first new information on the other of the first and second recording segments. Upon reception of a command to write second new information, the recording control means activating the above-indicated other head to erase the first new information recorded on the above-indicated other recording segment, while activating the above-indicated one head to write the second new information on the above-indicated one recording segment.

REFERENCES:
patent: 4544443 (1985-10-01), Ohta et al.
patent: 4612587 (1986-09-01), Kaneko et al.
patent: 4737947 (1988-04-01), Osato et al.

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