Magnetooptische aufzeichnungseinrichtung

Magneto=optical recording system

Abstract

A magneto-optical disc (1) responds to light generated by a laser (2) that generates an emission which passes through a collimate (3), beam splitter (4) and focussing lens (5). Signals reflected from the disc are directed by the beam splitter to an analyser (8) which passes only light with a specific polarising angle. The signals are received by a detector. All the units form the optical head module (12). The recording of information on the disc requires that the disc temp. is raised above the Curie point. A magnetic drive stage (15) provides a modulating effect. The laser (2) is also controlled by a drive circuit (16) which varies the intensity of the optical beam.

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Patent Citations (3)

    Publication numberPublication dateAssigneeTitle
    JP-H0635303-AFebruary 10, 1994Eastman Kodak Co, イーストマン コダック カンパニーGrey scale single component non-magnetic developing system
    JP-S51107112-ASeptember 22, 1976Fuji Photo Film Co LtdJikishiitonokirokusaiseihoho oyobi sochi
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Cited By (7)

    Publication numberPublication dateAssigneeTitle
    EP-0419269-A2March 27, 1991Nikon CorporationMéthode d'enregistrement magnéto-optique et appareil utilisé à cette fin
    EP-0419269-A3August 26, 1992Nikon CorporationMagnetooptical pit position recording method and apparatus used therefor
    EP-0470826-A1February 12, 1992Sharp Kabushiki KaishaMagnetooptisches Aufzeichnungssystem
    EP-0524315-A1January 27, 1993Sony CorporationMethod for reproducing signal in optically recording medium
    EP-0524315-B1July 03, 1996Sony CorporationProcede pour la reproduction des signaux dans un support d'enregistrement optique
    EP-0545722-A1June 09, 1993Sharp Kabushiki KaishaDisque magnétooptique
    US-5087532-AFebruary 11, 1992Minnesota Mining And Manufacturing CompanyDirect-overwrite magneto-optic media