DE69631743D1 - Magnetooptisches Aufzeichnungsmedium und Verfahren zur Wiedergabe davon - Google Patents

Magnetooptisches Aufzeichnungsmedium und Verfahren zur Wiedergabe davon

Info

Publication number
DE69631743D1
DE69631743D1 DE69631743T DE69631743T DE69631743D1 DE 69631743 D1 DE69631743 D1 DE 69631743D1 DE 69631743 T DE69631743 T DE 69631743T DE 69631743 T DE69631743 T DE 69631743T DE 69631743 D1 DE69631743 D1 DE 69631743D1
Authority
DE
Germany
Prior art keywords
magneto
reproducing
recording medium
optical recording
optical
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
DE69631743T
Other languages
English (en)
Other versions
DE69631743T2 (de
Inventor
Junji Hirokane
Junichiro Nakayama
Junsaku Nakajima
Akira Takahashi
Kenji Ohta
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.)
Sharp Corp
Original Assignee
Sharp 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 Sharp Corp filed Critical Sharp Corp
Application granted granted Critical
Publication of DE69631743D1 publication Critical patent/DE69631743D1/de
Publication of DE69631743T2 publication Critical patent/DE69631743T2/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
    • 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
    • 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
    • G11B11/03—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 deforming with non-mechanical means, e.g. laser, beam of particles
    • 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
    • G11B11/10582—Record carriers characterised by the selection of the material or by the structure or form
    • G11B11/10584—Record carriers characterised by the selection of the material or by the structure or form characterised by the form, e.g. comprising mechanical protection elements
    • 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
    • G11B11/10582—Record carriers characterised by the selection of the material or by the structure or form
    • G11B11/10586—Record carriers characterised by the selection of the material or by the structure or form characterised by the selection of the material
    • G11B11/10589—Details
    • 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
    • G11B11/10582—Record carriers characterised by the selection of the material or by the structure or form
    • G11B11/10586—Record carriers characterised by the selection of the material or by the structure or form characterised by the selection of the material
    • G11B11/10589—Details
    • G11B11/10593—Details for improving read-out properties, e.g. polarisation of light

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
DE69631743T 1995-12-25 1996-12-20 Magnetooptisches Aufzeichnungsmedium und Verfahren zur Wiedergabe davon Expired - Lifetime DE69631743T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP33669895 1995-12-25
JP7336698A JPH09180276A (ja) 1995-12-25 1995-12-25 光磁気記録媒体およびその再生方法

Publications (2)

Publication Number Publication Date
DE69631743D1 true DE69631743D1 (de) 2004-04-08
DE69631743T2 DE69631743T2 (de) 2005-02-10

Family

ID=18301881

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69631743T Expired - Lifetime DE69631743T2 (de) 1995-12-25 1996-12-20 Magnetooptisches Aufzeichnungsmedium und Verfahren zur Wiedergabe davon

Country Status (5)

Country Link
US (1) US5777953A (de)
EP (1) EP0782135B1 (de)
JP (1) JPH09180276A (de)
KR (1) KR100222218B1 (de)
DE (1) DE69631743T2 (de)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2989575B2 (ja) 1997-12-12 1999-12-13 三洋電機株式会社 光磁気記録媒体
US6238763B1 (en) 1998-01-06 2001-05-29 Imation Corp. Rewritable optical data storage disk having enhanced flatness
US5972461A (en) 1998-01-06 1999-10-26 Imation Corp. Rewritable optical data storage disk having enhanced flatness
JP3492525B2 (ja) * 1998-06-19 2004-02-03 シャープ株式会社 光磁気記録媒体
JP2000228040A (ja) * 1999-02-04 2000-08-15 Sony Corp 光磁気記録媒体
JP3995833B2 (ja) 1999-06-29 2007-10-24 シャープ株式会社 光磁気記録媒体
US6590836B1 (en) * 1999-09-29 2003-07-08 Sanyo Electric Co., Ltd. Magneto optical recording medium capable of preventing a reproduction layer from having a degraded characteristic
JP2001126327A (ja) * 1999-10-22 2001-05-11 Sony Corp 光磁気記録媒体
JP3626050B2 (ja) 1999-11-02 2005-03-02 シャープ株式会社 光磁気記録媒体及びその記録方法
JP2001222843A (ja) 2000-02-07 2001-08-17 Sony Corp 光磁気記録媒体
JP2002329352A (ja) 2001-04-27 2002-11-15 Sharp Corp 光磁気記録媒体
JP2003162848A (ja) * 2001-11-26 2003-06-06 Fujitsu Ltd 光磁気記録媒体及び記憶装置
JP2003296985A (ja) * 2002-03-28 2003-10-17 Samsung Electronics Co Ltd 反応拡散を利用する記録方法、この方法を利用する記録媒体及びこの記録媒体を利用する記録再生装置
DE10222218A1 (de) * 2002-05-16 2003-12-04 Freudenberg Carl Kg Magnetventil

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2812817B2 (ja) * 1991-07-08 1998-10-22 シャープ株式会社 光磁気記録媒体
JPH05101472A (ja) * 1991-10-09 1993-04-23 Sony Corp 光磁気記録再生方式
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
DE69332846T2 (de) * 1992-11-06 2003-12-24 Sharp Kk Magnetooptischer Aufzeichnungsträger und Verfahren zur Aufzeichnung und Wiedergabe und für den magnetooptischen Aufzeichnungsträger ausgebildetes optische Kopf
JPH06150418A (ja) 1992-11-06 1994-05-31 Sharp Corp 光磁気記録媒体および記録再生方法
JP2809991B2 (ja) * 1994-01-14 1998-10-15 富士通株式会社 光磁気記録媒体及び該媒体に記録された情報の再生方法
JP3088619B2 (ja) * 1994-01-17 2000-09-18 富士通株式会社 光磁気記録媒体及び該媒体に記録された情報の再生方法
JP3230388B2 (ja) * 1994-03-15 2001-11-19 富士通株式会社 光磁気記録媒体及び該媒体に記録された情報の再生方法
JP3177395B2 (ja) * 1995-01-31 2001-06-18 シャープ株式会社 光磁気記録媒体及びその再生方法

Also Published As

Publication number Publication date
DE69631743T2 (de) 2005-02-10
EP0782135B1 (de) 2004-03-03
EP0782135A2 (de) 1997-07-02
JPH09180276A (ja) 1997-07-11
KR970050430A (ko) 1997-07-29
KR100222218B1 (ko) 1999-10-01
US5777953A (en) 1998-07-07
EP0782135A3 (de) 1998-07-08

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