DE3889203T2 - 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
DE3889203T2
DE3889203T2 DE3889203T DE3889203T DE3889203T2 DE 3889203 T2 DE3889203 T2 DE 3889203T2 DE 3889203 T DE3889203 T DE 3889203T DE 3889203 T DE3889203 T DE 3889203T DE 3889203 T2 DE3889203 T2 DE 3889203T2
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
DE3889203D1 (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 JP30192387A external-priority patent/JP2762445B2/ja
Priority claimed from JP62301922A external-priority patent/JP2805746B2/ja
Application filed by Sony Corp filed Critical Sony Corp
Publication of DE3889203D1 publication Critical patent/DE3889203D1/de
Application granted granted Critical
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
JP30192387A JP2762445B2 (ja) 1987-11-30 1987-11-30 光磁気記録媒体の信号再生方法
JP62301922A JP2805746B2 (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 DE3889203D1 (de) 1994-05-26
DE3889203T2 true 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
CA2060547C (en) * 1991-02-08 2002-04-23 Masumi Ohta System and method of reproducing signals recorded on a magneto-optic recording medium
EP0747896B1 (de) * 1991-02-08 2000-05-10 Sony Corporation Magnetooptisches Aufzeichnungs- und/oder -wiedergabegerät
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
CA2060549C (en) * 1991-02-08 2002-08-13 Masumi Ohta Magneto-optical recording medium
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
EP1426944A3 (de) * 1993-04-02 2008-01-23 Canon Kabushiki Kaisha Verfahren zur Herstellung einem magneto-optischen Aufzeichnungsmedium
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
AU3460097A (en) * 1996-07-12 1998-02-09 Hitachi Maxell, Ltd. Magneto-optical recording medium, its reproducing method and reproducer
KR20000022390A (ko) 1996-07-12 2000-04-25 다카노 야스아키 광자기기록매체, 그 재생방법 및 재생장치
US6226233B1 (en) 1996-07-30 2001-05-01 Seagate Technology, Inc. Magneto-optical system utilizing MSR media
DE69735074T2 (de) * 1996-08-27 2006-08-03 Matsushita Electric Industrial Co., Ltd., Kadoma Magnetooptisches Aufzeichnungsmedium und zugehöriges Leseverfahren
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
EP0899721A4 (de) * 1997-02-17 2002-03-13 Seiko Epson Corp Magnetaufzeichnungsmethode
JPH11185314A (ja) * 1997-12-25 1999-07-09 Sanyo Electric Co Ltd 情報記録再生装置
WO1999038161A1 (fr) 1998-01-23 1999-07-29 Sanyo Electric Co., Ltd. Procede de reproduction pour support d'enregistrement magneto-optique, et dispositif de disque magneto-optique
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

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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
DE3584945D1 (de) * 1984-10-30 1992-01-30 Brother Ind Ltd Magnetooptisches speichermedium und geraet 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
DE3889203D1 (de) 1994-05-26
EP0318925A3 (en) 1990-09-26
KR890008761A (ko) 1989-07-12
KR970002341B1 (ko) 1997-03-03
US5018119A (en) 1991-05-21
EP0318925B1 (de) 1994-04-20
EP0318925A2 (de) 1989-06-07

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