DE68917996D1 - Magneto-optisches Aufzeichnungsgerät mit moduliertem Magnetfeld. - Google Patents

Magneto-optisches Aufzeichnungsgerät mit moduliertem Magnetfeld.

Info

Publication number
DE68917996D1
DE68917996D1 DE68917996T DE68917996T DE68917996D1 DE 68917996 D1 DE68917996 D1 DE 68917996D1 DE 68917996 T DE68917996 T DE 68917996T DE 68917996 T DE68917996 T DE 68917996T DE 68917996 D1 DE68917996 D1 DE 68917996D1
Authority
DE
Germany
Prior art keywords
magneto
magnetic field
medium
recording device
optical recording
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 - Fee Related
Application number
DE68917996T
Other languages
English (en)
Other versions
DE68917996T2 (de
Inventor
Nieuwland Jacob Van
Jacobus Heemskerk
Johannes Bakx
Jan Jozias Janse
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.)
Philips and Du Pont Optical Co BV
Original Assignee
Philips Gloeilampenfabrieken NV
Philips and Du Pont Optical Co BV
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 Philips Gloeilampenfabrieken NV, Philips and Du Pont Optical Co BV filed Critical Philips Gloeilampenfabrieken NV
Publication of DE68917996D1 publication Critical patent/DE68917996D1/de
Application granted granted Critical
Publication of DE68917996T2 publication Critical patent/DE68917996T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B13/00—Recording simultaneously or selectively by methods covered by different main groups among G11B3/00, G11B5/00, G11B7/00 and G11B9/00; Record carriers therefor not otherwise provided for; Reproducing therefrom not otherwise provided for
    • G11B13/04—Recording simultaneously or selectively by methods covered by different main groups among G11B3/00, G11B5/00, G11B7/00 and G11B9/00; Record carriers therefor not otherwise provided for; Reproducing therefrom not otherwise provided for magnetically or by magnetisation and optically or by radiation, for changing or sensing optical properties
    • 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
    • G11B11/10595—Control of operating function
    • 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
    • G11B11/10502—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 characterised by the transducing operation to be executed
    • G11B11/10504—Recording
    • G11B11/10508—Recording by modulating only the magnetic field at the transducer
    • 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
    • G11B11/10534—Heads for recording by magnetising, demagnetising or transfer of magnetisation, by radiation, e.g. for thermomagnetic recording
    • 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
    • G11B11/1055—Disposition or mounting of transducers relative to record carriers
    • G11B11/10576—Disposition or mounting of transducers relative to record carriers with provision for moving the transducers for maintaining alignment or spacing relative to the carrier

Landscapes

  • Recording Or Reproducing By Magnetic Means (AREA)
  • Holo Graphy (AREA)
DE68917996T 1988-06-07 1989-06-01 Magneto-optisches Aufzeichnungsgerät mit moduliertem Magnetfeld. Expired - Fee Related DE68917996T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8807544A FR2632438A1 (fr) 1988-06-07 1988-06-07 Enregistreur magneto-optique a champ magnetique module

Publications (2)

Publication Number Publication Date
DE68917996D1 true DE68917996D1 (de) 1994-10-13
DE68917996T2 DE68917996T2 (de) 1995-04-20

Family

ID=9367014

Family Applications (1)

Application Number Title Priority Date Filing Date
DE68917996T Expired - Fee Related DE68917996T2 (de) 1988-06-07 1989-06-01 Magneto-optisches Aufzeichnungsgerät mit moduliertem Magnetfeld.

Country Status (9)

Country Link
US (1) US5163032A (de)
EP (1) EP0345877B1 (de)
JP (1) JPH0264946A (de)
KR (1) KR910001692A (de)
CN (1) CN1039317A (de)
AT (1) ATE111254T1 (de)
AU (1) AU3604789A (de)
DE (1) DE68917996T2 (de)
FR (1) FR2632438A1 (de)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3907057A1 (de) * 1989-03-04 1990-09-13 Thomson Brandt Gmbh Schaltungsanordnung zur umkehrung eines magnetfeldes
JP3188339B2 (ja) * 1992-03-06 2001-07-16 キヤノン株式会社 磁気ヘッド駆動装置および光磁気記録装置
US5666333A (en) * 1995-04-07 1997-09-09 Discovision Associates Biasing level controller for magneto-optical recording device
GB2335785B (en) 1998-03-24 2002-09-18 Quantum Corp Multi-channel magnetic tape system having optical tracking servo
US7029726B1 (en) 1999-07-27 2006-04-18 Quantum Corporation Method for forming a servo pattern on a magnetic tape
US7153366B1 (en) 1998-03-24 2006-12-26 Quantum Corporation Systems and method for forming a servo pattern on a magnetic tape
EP1205912A4 (de) 1999-02-16 2002-08-21 Quantum Corp Methode zum schreiben von servosignalen auf magnetband
WO2000049605A1 (fr) 1999-02-17 2000-08-24 Quantum Corporation Procede d'ecriture de signaux d'asservissement sur une bande magnetique
US6961200B2 (en) 1999-07-27 2005-11-01 Quantum Corporation Optical servo track identification on tape storage media
US6558774B1 (en) 1999-08-17 2003-05-06 Quantum Corporation Multiple-layer backcoating for magnetic tape
US6940676B1 (en) 2000-06-07 2005-09-06 Quantum Corporation Triple push-pull optical tracking system
US6940681B2 (en) 2001-08-20 2005-09-06 Quantum Corporation Optical to magnetic alignment in magnetic tape system
US7023650B2 (en) 2001-11-07 2006-04-04 Quantum Corporation Optical sensor to recording head alignment
US6980390B2 (en) 2003-02-05 2005-12-27 Quantum Corporation Magnetic media with embedded optical servo tracks
US7187515B2 (en) 2003-02-05 2007-03-06 Quantum Corporation Method and system for tracking magnetic media with embedded optical servo tracks

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7904724A (nl) * 1979-06-18 1980-12-22 Philips Nv Optische aftastinrichting met fokusseerstelsel.
JPS57133503A (en) * 1981-02-10 1982-08-18 Sharp Corp Optical and magnetic recorder and reproducer
JPS58179088A (ja) * 1982-04-15 1983-10-20 Pioneer Electronic Corp 情報記録装置
JPS58179904A (ja) * 1982-04-15 1983-10-21 Pioneer Electronic Corp 情報記録方式
JPS60630A (ja) * 1983-06-16 1985-01-05 Matsushita Electric Ind Co Ltd 光学式記録再生装置
JPH0719403B2 (ja) * 1984-04-02 1995-03-06 日本電気株式会社 光磁気記録再生消去装置
JPH0619863B2 (ja) * 1984-06-13 1994-03-16 株式会社日立製作所 光磁気情報記憶方法及び装置
JP2533847B2 (ja) * 1985-10-17 1996-09-11 オリンパス光学工業株式会社 光磁気記録再生装置
JPS63177304A (ja) * 1987-01-16 1988-07-21 Sanyo Electric Co Ltd 光磁気情報記録装置の外部磁界印加装置

Also Published As

Publication number Publication date
US5163032A (en) 1992-11-10
ATE111254T1 (de) 1994-09-15
KR910001692A (ko) 1991-01-31
EP0345877A1 (de) 1989-12-13
DE68917996T2 (de) 1995-04-20
JPH0264946A (ja) 1990-03-05
AU3604789A (en) 1990-08-16
CN1039317A (zh) 1990-01-31
FR2632438A1 (fr) 1989-12-08
EP0345877B1 (de) 1994-09-07

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8327 Change in the person/name/address of the patent owner

Owner name: PHILIPS AND DU PONT OPTICAL CO., NIEUWEGEIN, NL PH

8339 Ceased/non-payment of the annual fee