ES2043727T3 - Disco registrador magneto-optico. - Google Patents

Disco registrador magneto-optico.

Info

Publication number
ES2043727T3
ES2043727T3 ES88108604T ES88108604T ES2043727T3 ES 2043727 T3 ES2043727 T3 ES 2043727T3 ES 88108604 T ES88108604 T ES 88108604T ES 88108604 T ES88108604 T ES 88108604T ES 2043727 T3 ES2043727 T3 ES 2043727T3
Authority
ES
Spain
Prior art keywords
recording
magneto
window
optical
disc
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
ES88108604T
Other languages
English (en)
Inventor
Fred W Spong
Boris J Muchnik
Christopher A Smith
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hoechst AG
Original Assignee
Hoechst AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hoechst AG filed Critical Hoechst AG
Application granted granted Critical
Publication of ES2043727T3 publication Critical patent/ES2043727T3/es
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B11/00Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
    • G11B11/10Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
    • G11B11/105Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
    • G11B11/10582Record carriers characterised by the selection of the material or by the structure or form

Abstract

UNA PLACA GRABADORA OPTICO - MAGNETICA 10 DISPONE DE UNA ESTRUCTURA DE GRABACION OPTICO - MAGNETICA 14 PARA LA GRABACION DE MODULACION DE INTENSIDAD DE LA RADIACION REGISTRADA 12 SIN LA EXISTENCIA DE UN CAMPO MAGNETICO. LA RADIACION CAE SOBRE LA CARA 13 DE LA PLACA REGISTRADORA. LA ESTRUCTURA DE GRABACION OPTICO - MAGNETICA 14 QUEDA EN LA CARA OPUESTA A LA DE CAIDA EN UN SOPORTE 16. EL MATERIAL DEL SOPORTE DISPONE DE UNAS CUALIDADES DE SOPORTE EXCEPCIONALES, QUE HAN SIDO SELECCIONADAS SIN TENER EN CUENTA LA FACILIDAD DEL PASO DE LA LUZ. LA ESTRUCTURA 18 DE ANILLOS DE JUNTA 19 - 19 MANTIENE LA VENTANA A DISTANCIA DE LA CARA DE LA ESTRUCTURA DE REGISTRO OPTICO MAGNETICO. ENTRE LA VENTANA Y LA ESTRUCTURA DE REGISTRO QUEDA UNA ABERTURA PARA AIRE 22. LA VENTANA ES TRANSPARENTE, PUDIENDO PASAR LA RADIACION A TRAVES CON UN MINIMO RETRASO OPTICO. EL RESULTADO ES QUE LA DIFERENCIA DEL ANGULO KERR EFECTIVO EN EL GIRO DE POLARIZACION DEPENDE DE LAS DIFERENTES DIRECCIONES, ES DECIR, HACIA ARRIBA O ABAJO, Y NO EN RELACION CON EL RETRASO OPTICO. EN OTROS EJEMPLOS DE EJECUCION DE PLACAS DE REGISTRO, LA ABERTURA PARA EL AIRE ESTA RELLENA CON UN PRODUCTOS DE PEGADO TRANSPARENTE, Y EN LUGAR DE LA ESTRUCTURA DE REGISTRO MAGNETICA SE UTILIZA UNA ESTRUCTURA DE VARIAS CAPAS DE INTERFERENCIA, PARA AMPLIFICAR LA DIFERENCIA DEL ANGULO KERR EFECTIVO DEL GIRO DE POLARIZACION, SEGUN LAS DIFERENTES DIRECCIONES DEL MAGNETIZADO. DOS DE ESTAS PLACAS DE REGISTRO, EN UNA DE ESTAS FORMAS DE EJECUCION ESTAN COLOCADAS ESPALDA CONTRA ESPALDA Y COMPARTEN UN MISMO SOPORTE, PARA TOMAR UNA PLACA DE REGISTRO OPTICO - MAGNETICA DE DOBLE CARA.
ES88108604T 1987-06-02 1988-05-30 Disco registrador magneto-optico. Expired - Lifetime ES2043727T3 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US5745087A 1987-06-02 1987-06-02

Publications (1)

Publication Number Publication Date
ES2043727T3 true ES2043727T3 (es) 1994-01-01

Family

ID=22010623

Family Applications (1)

Application Number Title Priority Date Filing Date
ES88108604T Expired - Lifetime ES2043727T3 (es) 1987-06-02 1988-05-30 Disco registrador magneto-optico.

Country Status (6)

Country Link
EP (1) EP0293797B1 (es)
JP (1) JPS63311647A (es)
AT (1) ATE93337T1 (es)
CA (1) CA1303739C (es)
DE (1) DE3883290D1 (es)
ES (1) ES2043727T3 (es)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4877666A (en) * 1987-08-11 1989-10-31 Kerdix, Inc. Magneto-optic substrates
US5667862A (en) * 1989-03-15 1997-09-16 Sony Corporation Magneto-optical disk
JP2880723B2 (ja) * 1989-03-15 1999-04-12 ソニー株式会社 光磁気ディスク
DE69031612T2 (de) * 1989-07-05 1998-03-12 Mitsui Petrochemical Ind Magnetooptische Aufzeichnungsmedien

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3519070A1 (de) * 1984-05-29 1985-12-05 Ricoh Co., Ltd., Tokio/Tokyo Magneto-optisches aufzeichnungsmedium
JPS6171436A (ja) * 1984-09-14 1986-04-12 Hitachi Ltd 光磁気記録媒体
JPS61255546A (ja) * 1985-05-09 1986-11-13 Kokusai Denshin Denwa Co Ltd <Kdd> 光磁気記録媒体

Also Published As

Publication number Publication date
EP0293797A2 (de) 1988-12-07
ATE93337T1 (de) 1993-09-15
EP0293797B1 (de) 1993-08-18
EP0293797A3 (en) 1990-12-05
DE3883290D1 (de) 1993-09-23
JPS63311647A (ja) 1988-12-20
CA1303739C (en) 1992-06-16

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