DE69029965D1 - Magneto-optisches Aufzeichnungs-/Wiedergabesystem - Google Patents

Magneto-optisches Aufzeichnungs-/Wiedergabesystem

Info

Publication number
DE69029965D1
DE69029965D1 DE69029965T DE69029965T DE69029965D1 DE 69029965 D1 DE69029965 D1 DE 69029965D1 DE 69029965 T DE69029965 T DE 69029965T DE 69029965 T DE69029965 T DE 69029965T DE 69029965 D1 DE69029965 D1 DE 69029965D1
Authority
DE
Germany
Prior art keywords
magneto
optical recording
playback system
playback
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
DE69029965T
Other languages
English (en)
Other versions
DE69029965T2 (de
Inventor
Shoji C O Tokorozawa Taniguchi
Naoharu C O Tokorozaw Yanagawa
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.)
Pioneer Corp
Original Assignee
Pioneer Electronic Corp
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 Pioneer Electronic Corp filed Critical Pioneer Electronic Corp
Publication of DE69029965D1 publication Critical patent/DE69029965D1/de
Application granted granted Critical
Publication of DE69029965T2 publication Critical patent/DE69029965T2/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
    • 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
    • G11B11/10502—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
    • G11B11/10502—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
    • G11B11/10515—Reproducing
DE69029965T 1990-03-08 1990-11-06 Magneto-optisches Aufzeichnungs-/Wiedergabesystem Expired - Fee Related DE69029965T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2057586A JPH07118106B2 (ja) 1990-03-08 1990-03-08 光磁気記録再生装置

Publications (2)

Publication Number Publication Date
DE69029965D1 true DE69029965D1 (de) 1997-03-27
DE69029965T2 DE69029965T2 (de) 1997-09-25

Family

ID=13059952

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69029965T Expired - Fee Related DE69029965T2 (de) 1990-03-08 1990-11-06 Magneto-optisches Aufzeichnungs-/Wiedergabesystem

Country Status (4)

Country Link
US (1) US5093816A (de)
EP (1) EP0447617B1 (de)
JP (1) JPH07118106B2 (de)
DE (1) DE69029965T2 (de)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2877889B2 (ja) * 1990-04-13 1999-04-05 パイオニア株式会社 光磁気記録再生装置
NL9001546A (nl) * 1990-07-06 1992-02-03 Philips Nv Inrichting voor het inschrijven en/of uitlezen van een magneto-optische informatiedrager.
JP2733127B2 (ja) * 1990-08-07 1998-03-30 シャープ株式会社 光磁気記録装置
GB9121904D0 (en) * 1991-10-16 1991-11-27 Penny & Giles Blackwood Ltd Sensor device
JPH05242546A (ja) * 1992-02-27 1993-09-21 Pioneer Electron Corp 光ディスクプレーヤ
US5970037A (en) * 1992-06-08 1999-10-19 Asahi Kogaku Kogyo Kabushiki Kaisha Magneto-optical disk apparatus
JP3098896B2 (ja) * 1992-06-23 2000-10-16 キヤノン株式会社 光磁気記録装置
JP3146683B2 (ja) * 1992-10-14 2001-03-19 ソニー株式会社 光磁気ディスク記録再生装置
US5636187A (en) * 1992-12-11 1997-06-03 Canon Kabushiki Kaisha Magnetooptical recording apparatus and magnetooptical recording method for canceling leakage magnetic fields associated with a recording medium and devices ancillary to the recording medium
JP2980273B2 (ja) * 1992-12-21 1999-11-22 キヤノン株式会社 光磁気記録装置
GB2293264B (en) * 1994-09-01 1998-05-27 Asahi Optical Co Ltd Magneto-optical disk apparatus
US5666333A (en) * 1995-04-07 1997-09-09 Discovision Associates Biasing level controller for magneto-optical recording device
JP3070516B2 (ja) * 1997-04-28 2000-07-31 日本電気株式会社 光ディスク装置

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH065585B2 (ja) * 1984-02-15 1994-01-19 株式会社日立製作所 光磁気記憶装置
DE3581114D1 (de) * 1984-04-12 1991-02-07 Mitsubishi Electric Corp Magnetkopf mit streuflussausgleich.
JPS61284801A (ja) * 1985-06-10 1986-12-15 Matsushita Electric Ind Co Ltd 光磁気記録再生装置
JPH073709B2 (ja) * 1985-09-13 1995-01-18 キヤノン株式会社 光磁気情報装置
JPH07109672B2 (ja) * 1986-06-03 1995-11-22 オリンパス光学工業株式会社 漏れ磁界補正装置
JP2619372B2 (ja) * 1986-12-10 1997-06-11 株式会社日立製作所 光磁気記録方法
JP2637415B2 (ja) * 1987-03-03 1997-08-06 オリンパス光学工業株式会社 光磁気記録再生装置
JPH065562B2 (ja) * 1988-07-20 1994-01-19 シャープ株式会社 光磁気記録再生装置の外部磁界装置
JPH0253201A (ja) * 1988-08-17 1990-02-22 Mitsubishi Electric Corp バイアス磁界印加装置

Also Published As

Publication number Publication date
US5093816A (en) 1992-03-03
DE69029965T2 (de) 1997-09-25
EP0447617B1 (de) 1997-02-19
EP0447617A3 (en) 1992-08-19
EP0447617A2 (de) 1991-09-25
JPH07118106B2 (ja) 1995-12-18
JPH03259444A (ja) 1991-11-19

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Legal Events

Date Code Title Description
8320 Willingness to grant licences declared (paragraph 23)
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee