DE3889203D1 - Methode zum optischen Abtasten eines Signals aus einem magneto-optischen Speichermedium. - Google Patents

Methode zum optischen Abtasten eines Signals aus einem magneto-optischen Speichermedium.

Info

Publication number
DE3889203D1
DE3889203D1 DE3889203T DE3889203T DE3889203D1 DE 3889203 D1 DE3889203 D1 DE 3889203D1 DE 3889203 T DE3889203 T DE 3889203T DE 3889203 T DE3889203 T DE 3889203T DE 3889203 D1 DE3889203 D1 DE 3889203D1
Authority
DE
Germany
Prior art keywords
magneto
signal
storage medium
optical storage
optically sampling
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
DE3889203T
Other languages
English (en)
Other versions
DE3889203T2 (de
Inventor
Katsuhisa Aratani
Minoru Kohno
Kenjiro Watanabe
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.)
Sony Corp
Original Assignee
Sony 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
Priority claimed from JP62301922A external-priority patent/JP2805746B2/ja
Priority claimed from JP30192387A external-priority patent/JP2762445B2/ja
Application filed by Sony Corp filed Critical Sony Corp
Application granted granted Critical
Publication of DE3889203D1 publication Critical patent/DE3889203D1/de
Publication of DE3889203T2 publication Critical patent/DE3889203T2/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • G11B11/10528—Shaping of magnetic domains, e.g. form, dimensions
    • 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
DE3889203T 1987-11-30 1988-11-29 Methode zum optischen Abtasten eines Signals aus einem magneto-optischen Speichermedium. Expired - Lifetime DE3889203T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP62301922A JP2805746B2 (ja) 1987-11-30 1987-11-30 光磁気記録媒体の信号再生方法
JP30192387A JP2762445B2 (ja) 1987-11-30 1987-11-30 光磁気記録媒体の信号再生方法

Publications (2)

Publication Number Publication Date
DE3889203D1 true DE3889203D1 (de) 1994-05-26
DE3889203T2 DE3889203T2 (de) 1994-11-03

Family

ID=26562927

Family Applications (1)

Application Number Title Priority Date Filing Date
DE3889203T Expired - Lifetime DE3889203T2 (de) 1987-11-30 1988-11-29 Methode zum optischen Abtasten eines Signals aus einem magneto-optischen Speichermedium.

Country Status (4)

Country Link
US (1) US5018119A (de)
EP (1) EP0318925B1 (de)
KR (1) KR970002341B1 (de)
DE (1) DE3889203T2 (de)

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US5512366A (en) * 1989-11-14 1996-04-30 Mitsubishi Denki Kabushiki Kaisha Magneto-optic recording medium and apparatus
US5168482A (en) * 1989-08-31 1992-12-01 Sony Corporation Magnetooptical recording and playback method employing multi-layer recording medium with record holding layer and playback layer
JP2884617B2 (ja) * 1989-09-08 1999-04-19 ソニー株式会社 光磁気記録再生方法
US5420728A (en) * 1990-03-24 1995-05-30 Seiko Epson Corporation Magneto-optical recording medium including a plurality of recording layers having different curie temperatures and method of recording and reading
JP3185932B2 (ja) * 1990-06-21 2001-07-11 セイコーエプソン株式会社 光磁気記録再生方法ならびに光磁気記録再生装置
US5574703A (en) * 1990-06-21 1996-11-12 Seiko Epson Corporation Magneto-optical method and apparatus for recording/reproducing data
EP0470546B1 (de) * 1990-08-07 1998-11-04 Hitachi Maxell Ltd. Magnetooptischer Aufzeichnungsträger
JP3038853B2 (ja) * 1990-09-13 2000-05-08 株式会社ニコン 高レベルのマージンが拡大したオーバーライト可能な光磁気記録媒体
JP2910250B2 (ja) * 1990-12-27 1999-06-23 ソニー株式会社 光磁気記録媒体
JP2969963B2 (ja) * 1990-12-28 1999-11-02 ソニー株式会社 光磁気記録媒体における信号再生方法
US5241520A (en) * 1990-12-28 1993-08-31 Sony Corporation System and method of reproducing signals recorded on a magneto-optic recording medium
CA2060549C (en) * 1991-02-08 2002-08-13 Masumi Ohta Magneto-optical recording medium
CA2060547C (en) * 1991-02-08 2002-04-23 Masumi Ohta System and method of reproducing signals recorded on a magneto-optic recording medium
EP0498459B1 (de) * 1991-02-08 1998-04-22 Sony Corporation Magnetooptisches Medium
JPH04255947A (ja) * 1991-02-08 1992-09-10 Sony Corp 光磁気記録方法と光磁気記録再生装置
JP3111479B2 (ja) * 1991-02-08 2000-11-20 ソニー株式会社 光磁気記録媒体
JP2959586B2 (ja) * 1991-02-12 1999-10-06 ソニー株式会社 光磁気ディスクの再生方法
JP2959588B2 (ja) * 1991-02-14 1999-10-06 ソニー株式会社 光磁気ディスク及びそのセクタ管理情報の記録方法ならびに再生方法
CA2067945C (en) * 1991-05-16 2001-09-04 Shintaro Tanaka Magneto-optical recording medium
JP2812817B2 (ja) * 1991-07-08 1998-10-22 シャープ株式会社 光磁気記録媒体
US5637411A (en) * 1991-07-29 1997-06-10 Hitachi Maxell, Ltd. Magneto-optical recording medium and process for producing the same
JP3159742B2 (ja) * 1991-10-07 2001-04-23 キヤノン株式会社 光磁気記録再生方法
US5384758A (en) * 1991-12-02 1995-01-24 Nikon Corporation Reproduction-only magneto-optical disk with selectively exchange coupled layers, and reproduction method and reproduction apparatus therefor
WO1994003892A1 (en) * 1992-07-29 1994-02-17 Seiko Epson Corporation Magneto-optic recording medium and method of its manufacture method
JP2986622B2 (ja) * 1992-09-02 1999-12-06 シャープ株式会社 光磁気メモリー素子およびその記録再生方法
JP2938284B2 (ja) * 1992-10-06 1999-08-23 シャープ株式会社 光磁気記録媒体及びこれを用いた記録再生方法
JP3092363B2 (ja) * 1992-12-01 2000-09-25 松下電器産業株式会社 光磁気記録媒体
JP2546477B2 (ja) * 1992-12-21 1996-10-23 日本電気株式会社 光磁気記録媒体とその記録再生方法及び記録再生装置
JP2957367B2 (ja) * 1993-01-07 1999-10-04 シャープ株式会社 光磁気記録媒体およびその記録方法と記録再生方法
JPH06243522A (ja) * 1993-02-16 1994-09-02 Nikon Corp 光磁気ディスク及びその再生方法
JPH06259799A (ja) * 1993-03-04 1994-09-16 Nikon Corp 光ディスクの再生方法及び再生装置
EP1158509A3 (de) 1993-04-02 2002-01-02 Canon Kabushiki Kaisha Magnetooptisches Aufzeichnungsverfahren
JP3333613B2 (ja) * 1993-12-07 2002-10-15 株式会社日立製作所 光情報記録媒体並びに光情報記録再生方法及び光情報記録再生装置
JP3566743B2 (ja) * 1993-12-13 2004-09-15 Ｔｄｋ株式会社 光記録媒体
JP3426034B2 (ja) * 1994-07-20 2003-07-14 シャープ株式会社 光磁気記録媒体および記録再生方法並びに光磁気記録媒体の製造方法
JP3243126B2 (ja) * 1994-08-11 2002-01-07 パイオニア株式会社 光磁気記録媒体
US5593790A (en) * 1994-12-29 1997-01-14 Imation Corp. Interference super-resolution using two magnetic layer construction
US5835105A (en) * 1995-03-30 1998-11-10 Imation Corp. Method of optically turning a magneto-optic medium having in order a substrate two dielectric layers, and a thick magneto-optic recording layer, and medium turner by that method
JP3445023B2 (ja) * 1995-06-08 2003-09-08 シャープ株式会社 光磁気記録媒体およびその再生方法並びに記録方法
US6424601B1 (en) 1996-07-12 2002-07-23 Hitachi Maxell, Ltd. Magneto-optical recording media having an auxiliary magnetic layer
CN1221510A (zh) * 1996-07-12 1999-06-30 日立马库塞鲁株式会社 磁光记录媒体及其再生方法和再生装置
US6226233B1 (en) 1996-07-30 2001-05-01 Seagate Technology, Inc. Magneto-optical system utilizing MSR media
US6018511A (en) * 1996-08-27 2000-01-25 Matsushita Electric Industrial Co., Ltd. Magneto-optical recording medium and readout method of the same
US5903526A (en) * 1996-09-20 1999-05-11 Victor Company Of Japan, Ltd. Magneto-optical recording medium having multiple magnetic layers
JPH10162443A (ja) * 1996-12-02 1998-06-19 Sanyo Electric Co Ltd 情報再生装置
WO1998036409A1 (fr) * 1997-02-17 1998-08-20 Seiko Epson Corporation Procede d'enregistrement magnetique
JPH11185314A (ja) * 1997-12-25 1999-07-09 Sanyo Electric Co Ltd 情報記録再生装置
CN1201315C (zh) 1998-01-23 2005-05-11 三洋电机株式会社 磁－光记录介质重现方法和磁－光盘装置
JP2002319197A (ja) * 2001-04-19 2002-10-31 Matsushita Electric Ind Co Ltd 光磁気記録媒体およびその製造方法

Family Cites Families (7)

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Publication number Priority date Publication date Assignee Title
FR1578005A (de) * 1968-04-25 1969-08-14
JPH0670858B2 (ja) * 1983-05-25 1994-09-07 ソニー株式会社 光磁気記録媒体とその製法
EP0180459B1 (de) * 1984-10-30 1991-12-18 Brother Kogyo Kabushiki Kaisha Magnetooptisches Speichermedium und Gerät zum Schreiben auf und Lesen von dem Medium
US4649519A (en) * 1985-09-30 1987-03-10 International Business Machines Corporation Self biasing thermal magneto-optic medium
JPS62137754A (ja) * 1985-12-09 1987-06-20 Canon Inc 光磁気再生方法
EP0258978B1 (de) * 1986-07-08 1998-10-07 Canon Kabushiki Kaisha Magnetoptisches Aufzeichnungsmedium mit der Möglichkeit des Überschreibens mit zwei oder mehr Magnetschichten und dieses Medium verwendende Aufzeichnungsmethode
AU600576B2 (en) * 1987-04-24 1990-08-16 Sony Corporation Thermomagnetic recording method applying power modulated laser on a magnetically coupled multi-layer structure of perpendicular anisotropy magnetic film

Also Published As

Publication number Publication date
KR970002341B1 (ko) 1997-03-03
EP0318925B1 (de) 1994-04-20
US5018119A (en) 1991-05-21
KR890008761A (ko) 1989-07-12
EP0318925A3 (en) 1990-09-26
DE3889203T2 (de) 1994-11-03
EP0318925A2 (de) 1989-06-07

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