ATE142817T1 - Magnetooptischer lesekopf - Google Patents

Magnetooptischer lesekopf

Info

Publication number
ATE142817T1
ATE142817T1 AT90403696T AT90403696T ATE142817T1 AT E142817 T1 ATE142817 T1 AT E142817T1 AT 90403696 T AT90403696 T AT 90403696T AT 90403696 T AT90403696 T AT 90403696T AT E142817 T1 ATE142817 T1 AT E142817T1
Authority
AT
Austria
Prior art keywords
magnetooptic
magnetic
reading head
layer
magnetic layer
Prior art date
Application number
AT90403696T
Other languages
English (en)
Inventor
Francois Maurice
Original Assignee
Thomson Multimedia Sa
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 Thomson Multimedia Sa filed Critical Thomson Multimedia Sa
Application granted granted Critical
Publication of ATE142817T1 publication Critical patent/ATE142817T1/de

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B11/00—Recording 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
    • G11B11/10—Recording 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
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B11/00—Recording 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
    • G11B11/10—Recording 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
    • G11B11/105—Recording 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
    • G11B11/10532—Heads
    • G11B11/10541—Heads for reproducing
    • G11B11/10543—Heads for reproducing using optical beam of radiation
    • G11B11/10547—Heads for reproducing using optical beam of radiation interacting with the magnetisation of an intermediate transfer element, e.g. magnetic film, included in the head

Landscapes

  • Optical Head (AREA)
  • Magnetic Heads (AREA)
AT90403696T 1989-12-28 1990-12-20 Magnetooptischer lesekopf ATE142817T1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8917313A FR2656723B1 (fr) 1989-12-28 1989-12-28 Tete de lecture multipiste magneto-optique.

Publications (1)

Publication Number Publication Date
ATE142817T1 true ATE142817T1 (de) 1996-09-15

Family

ID=9389060

Family Applications (1)

Application Number Title Priority Date Filing Date
AT90403696T ATE142817T1 (de) 1989-12-28 1990-12-20 Magnetooptischer lesekopf

Country Status (12)

Country Link
US (2) US5689391A (de)
EP (1) EP0436424B1 (de)
JP (1) JP3454819B2 (de)
KR (1) KR100230668B1 (de)
AT (1) ATE142817T1 (de)
CA (1) CA2047185C (de)
DE (1) DE69028510T2 (de)
DK (1) DK0436424T3 (de)
ES (1) ES2091234T3 (de)
FR (1) FR2656723B1 (de)
GR (1) GR3021145T3 (de)
WO (1) WO1991010234A1 (de)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2656723B1 (fr) * 1989-12-28 1995-07-21 Thomson Consumer Electronics Tete de lecture multipiste magneto-optique.
FR2680268A1 (fr) * 1991-08-09 1993-02-12 Thomson Csf Tete de lecture magneto-optique.
FR2696037B1 (fr) * 1992-09-18 1994-11-04 Thomson Csf Dispositif de lecture magnétique.
FR2701332B1 (fr) * 1993-02-09 1995-03-10 Thomson Csf Tête de lecture magnéto-optique et appareil de lecture d'enregistrements magnétiques multipistes.
EP0627735B1 (de) * 1993-06-03 1999-10-06 THOMSON multimedia Optisches System zur Wiedergabe und/oder Aufzeichnung von Information
FR2722024B1 (fr) 1994-07-01 1996-08-02 Thomson Consumer Electronics Circuits magnetiques pour ensemble de tetes magnetiques d'enregistrement/lecture
TW294810B (de) * 1994-09-23 1997-01-01 Philips Electronics Nv
FR2727589B1 (fr) * 1994-11-25 1997-01-03 Thomson Csf Dispositif et systeme de lecture
US5920538A (en) * 1998-06-11 1999-07-06 Tandberg Data Asa Magneto-optical readout method and magneto-optical readout head and method for making same
EP1139341A4 (de) * 1998-12-07 2005-11-16 Fujitsu Ltd Informationswiedergabevorrichtung, informationswiedergabekopf mit dem chip und informationswiedergabeverfahren
FR2797514B3 (fr) * 1999-08-10 2001-10-12 Thomson Csf Dispositif de lecture magneto-optique pour bandes magnetiques multipistes
FR2797513B1 (fr) * 1999-08-10 2001-10-26 Thomson Csf Dispositif de lecture magneto-optique pour bandes magnetiques multipistes
FR2797512A1 (fr) * 1999-08-13 2001-02-16 Thomson Csf Tete de lecture magneto-optique a bruit reduit
FR2797709A1 (fr) * 1999-08-17 2001-02-23 Thomson Csf Tete de lecteur magneto-optique a faible bruit et grande efficacite
FR2797710B1 (fr) * 1999-08-20 2001-11-09 Thomson Csf Tete de lecture anti-abrasion
FR2797708B1 (fr) * 1999-08-20 2002-07-12 Thomson Csf Tete de lecture magnetique
US6771567B2 (en) 2001-11-06 2004-08-03 O-Mass As Dual shield vertical magneto-optical read head
US6535351B1 (en) 2001-11-14 2003-03-18 Imation Corp. Narrow track resolution magneto-optic read head
US7168081B2 (en) * 2003-08-29 2007-01-23 Imation Corp. Domain stabilized magneto-optic head
DE102004025937A1 (de) * 2004-05-27 2005-12-22 Giesecke & Devrient Gmbh Vorrichtung und Verfahren zur Untersuchung von magnetichen Eigenschaften von Objekten
US7997773B2 (en) * 2008-11-07 2011-08-16 Velcro Industries B.V. Retaining wires

Family Cites Families (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3636535A (en) * 1969-12-10 1972-01-18 Magnavox Co Magneto-optical transducer
US3626394A (en) * 1970-04-09 1971-12-07 Magnavox Co Magneto-optical system
US3665431A (en) * 1970-06-25 1972-05-23 Ibm Magneto-optic transducer
JPS58153244A (ja) * 1982-03-05 1983-09-12 Matsushita Electric Ind Co Ltd 光磁気記録媒体
US4618901A (en) * 1982-07-19 1986-10-21 Nippon Telegraph & Telephone Public Corporation High density magnetic head
JPS5930255A (ja) * 1982-08-11 1984-02-17 Nippon Hoso Kyokai <Nhk> 磁気−光ヘツド
JPS59148161A (ja) * 1983-02-14 1984-08-24 Seiko Instr & Electronics Ltd 光磁気デイスク
US4609961A (en) * 1984-08-20 1986-09-02 Datatape Incorporated Faraday-effect magneto-optic transducer
JPS61104348A (ja) * 1984-10-22 1986-05-22 Nec Corp 光磁気ヘツド
JPS61107553A (ja) * 1984-10-30 1986-05-26 Brother Ind Ltd 光磁気再生装置
US4707755A (en) * 1985-03-20 1987-11-17 Hitachi, Ltd. Optical read-out magnetic head
US4654837A (en) * 1985-09-06 1987-03-31 Datatape Incorporated Magneto-optic transducer with enhanced signal performance
JPH071561B2 (ja) * 1986-02-12 1995-01-11 株式会社日立製作所 光磁気型再生磁気ヘツド
JPH0760535B2 (ja) * 1986-04-14 1995-06-28 株式会社日立製作所 光磁気型再生磁気ヘツド
JPH01117748A (ja) * 1987-10-30 1989-05-10 Kanebo Ltd 焼菓子の製法
JPH01201848A (ja) * 1988-02-05 1989-08-14 Fuji Photo Film Co Ltd 磁気光学薄膜
FR2656723B1 (fr) * 1989-12-28 1995-07-21 Thomson Consumer Electronics Tete de lecture multipiste magneto-optique.
FR2676303B1 (fr) * 1991-05-07 1993-07-16 Commissariat Energie Atomique Tete magneto-optique integree de lecture et d'ecriture et procede de realisation.
FR2680268A1 (fr) * 1991-08-09 1993-02-12 Thomson Csf Tete de lecture magneto-optique.
JPH06224115A (ja) * 1993-01-25 1994-08-12 Matsushita Electric Ind Co Ltd レジストパターン形成方法

Also Published As

Publication number Publication date
KR920701960A (ko) 1992-08-12
US5689391A (en) 1997-11-18
FR2656723B1 (fr) 1995-07-21
DE69028510T2 (de) 1997-02-06
KR100230668B1 (ko) 1999-11-15
FR2656723A1 (fr) 1991-07-05
DK0436424T3 (de) 1997-03-03
CA2047185A1 (fr) 1991-06-29
JP3454819B2 (ja) 2003-10-06
EP0436424B1 (de) 1996-09-11
EP0436424A1 (de) 1991-07-10
CA2047185C (fr) 2005-08-16
JPH04504922A (ja) 1992-08-27
DE69028510D1 (de) 1996-10-17
ES2091234T3 (es) 1996-11-01
GR3021145T3 (en) 1996-12-31
WO1991010234A1 (fr) 1991-07-11
US6151192A (en) 2000-11-21

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Legal Events

Date Code Title Description
UEP Publication of translation of european patent specification
REN Ceased due to non-payment of the annual fee