Photomagnetic recording device and photomagnetic reproducing dev

Details Photomagnetic recording device and photomagnetic reproducing dev Photomagnetic recording device and photomagnetic reproducing dev

1991-01-28

1997-06-17

Edun, Muhammad N.

Dynamic information storage or retrieval

Binary pulse train information signal

Binary signal gain processing

369109, 369 48, 369116, 369 13, G11B 700

Patent

active

056403798

ABSTRACT:
In a photomagnetic recording device where a record light beam irradiates a photomagnetic record medium to form a pit on the photomagnetic record medium, and a reproducing light beam irradiates the pit to reproduce the record information, the record light beam is pulsed intermittently at least at the beginning of the irradiation period so that a pit of substantially circular shape is formed on the photomagnetic record medium, whereby information is recorded with high accuracy.

REFERENCES:
patent: 4646103 (1987-02-01), Sugiyama et al.
patent: 4873680 (1989-10-01), Chung et al.
patent: 5001692 (1991-03-01), Farla et al.
patent: 5007039 (1991-04-01), Sakemoto et al.
patent: 5038338 (1991-08-01), Terao et al.
patent: 5065377 (1991-11-01), Spruit et al.
patent: 5083212 (1992-01-01), Owa et al.

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