Magneto-optical recording and reproducing system

Details Magneto-optical recording and reproducing system Magneto-optical recording and reproducing system

1982-03-15

1984-10-16

Wolff, John H.

Dynamic magnetic information storage or retrieval

Head

Read only detector using light for reading magnetically...

G11B 532

Patent

active

044778520

ABSTRACT:
A magneto-optical recording and reproducing apparatus for recording information on a recording medium made of a magneto-optical recording material. The apparatus is provided with at least two lasers for carrying out simultaneously a combination of two functions of the apparatus such as recording-reproducing or reproducing-erasing or erasing-recording functions. The recording and erasing is effected optically by independent light beams. Provision is made for recording and erasing the information by light beam and by use of an application of magnetic fields of different coercive values. The lasers are modulated or not independently and an optical system is provided through which the write-in and readout takes place and focusing is in response to the reflected light from the record on the recording medium.

REFERENCES:
patent: 3829847 (1974-08-01), Masi
patent: 3905040 (1975-09-01), Otala
IBM/TOB, vol. 11, No. 10, Mar. 1969, "Recording & Readout System", by Voegeli, p. 1366.

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