DE69018544D1 - Wiedergabemethode für magneto-optische Aufzeichnung. - Google Patents

Wiedergabemethode für magneto-optische Aufzeichnung.

Info

Publication number
DE69018544D1
DE69018544D1 DE69018544T DE69018544T DE69018544D1 DE 69018544 D1 DE69018544 D1 DE 69018544D1 DE 69018544 T DE69018544 T DE 69018544T DE 69018544 T DE69018544 T DE 69018544T DE 69018544 D1 DE69018544 D1 DE 69018544D1
Authority
DE
Germany
Prior art keywords
magneto
optical recording
playback method
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 - Lifetime
Application number
DE69018544T
Other languages
English (en)
Other versions
DE69018544T2 (de
Inventor
Katsuhisa Aratani
Atsushi Fukumoto
Masumi 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.)
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 JP22568589A external-priority patent/JP2910082B2/ja
Priority claimed from JP22939689A external-priority patent/JPH0393056A/ja
Priority claimed from JP22939589A external-priority patent/JP2910084B2/ja
Priority claimed from JP3914790A external-priority patent/JPH03242845A/ja
Application filed by Sony Corp filed Critical Sony Corp
Application granted granted Critical
Publication of DE69018544D1 publication Critical patent/DE69018544D1/de
Publication of DE69018544T2 publication Critical patent/DE69018544T2/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
    • G11B11/10517—Overwriting or erasing
    • 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
    • G11B11/10—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
DE69018544T 1989-08-31 1990-08-31 Wiedergabemethode für magneto-optische Aufzeichnung. Expired - Lifetime DE69018544T2 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP22568589A JP2910082B2 (ja) 1989-08-31 1989-08-31 光磁気記録再生方法
JP22939689A JPH0393056A (ja) 1989-09-06 1989-09-06 光磁気記録媒体
JP22939589A JP2910084B2 (ja) 1989-09-06 1989-09-06 光磁気記録媒体における信号再生方法
JP3914790A JPH03242845A (ja) 1990-02-20 1990-02-20 光磁気記録方法

Publications (2)

Publication Number Publication Date
DE69018544D1 true DE69018544D1 (de) 1995-05-18
DE69018544T2 DE69018544T2 (de) 1995-12-21

Family

ID=27460712

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69018544T Expired - Lifetime DE69018544T2 (de) 1989-08-31 1990-08-31 Wiedergabemethode für magneto-optische Aufzeichnung.

Country Status (3)

Country Link
US (1) US5168482A (de)
EP (1) EP0415449B1 (de)
DE (1) DE69018544T2 (de)

Families Citing this family (68)

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JP2884617B2 (ja) * 1989-09-08 1999-04-19 ソニー株式会社 光磁気記録再生方法
US5241520A (en) * 1990-12-28 1993-08-31 Sony Corporation System and method of reproducing signals recorded on a magneto-optic recording medium
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
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EP0747896B1 (de) * 1991-02-08 2000-05-10 Sony Corporation Magnetooptisches Aufzeichnungs- und/oder -wiedergabegerät
JP3111479B2 (ja) * 1991-02-08 2000-11-20 ソニー株式会社 光磁気記録媒体
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JP2795567B2 (ja) * 1991-11-25 1998-09-10 シャープ株式会社 光磁気ディスク及び再生方法
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
US5682360A (en) * 1992-01-29 1997-10-28 Matsushita Electric Industrial Co., Ltd. Recording and reproducing apparatus for use with a recording medium having an optical recording layer and magnetic recording layer
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US5473584A (en) * 1992-01-29 1995-12-05 Matsushita Electric Industrial Co., Ltd. Recording and reproducing apparatus
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USRE38501E1 (en) 1992-08-28 2004-04-20 Canon Kabushiki Kaisha Magnetooptical recording medium and information recording and reproducing methods using the recording medium
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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
JPH06195784A (ja) * 1992-12-28 1994-07-15 Canon Inc 光磁気記録媒体及び該媒体を用いた情報記録方法
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
US5702793A (en) * 1993-02-25 1997-12-30 Nippon Steel Corporation Magneto-optical recording medium, disk and method of manufacturing the same
DE69430883T2 (de) * 1993-04-02 2003-01-23 Canon K.K., Tokio/Tokyo Magneto-optisches Aufzeichnungsmedium auf dem es moglich ist, Informationen hoher Zeichendichte aufzuzeichnen und Verfahren zur Wiedergabe der aufgezeichneten Informationen
US5414652A (en) * 1993-08-27 1995-05-09 Sharp Kabushiki Kaisha Magneto-optical memory element
JP2664330B2 (ja) * 1993-09-02 1997-10-15 富士通株式会社 光磁気記録媒体
JPH07169127A (ja) * 1993-10-01 1995-07-04 Minnesota Mining & Mfg Co <3M> 非晶質希土類酸化物
JPH07110971A (ja) * 1993-10-13 1995-04-25 Pioneer Electron Corp 光磁気記録媒体、光磁気記録媒体記録装置及び光磁気記録媒体再生装置
DE69430099T2 (de) * 1993-11-24 2002-10-31 Mitsubishi Chemical Corp., Tokio/Tokyo Magnetooptisches Aufzeichnungsmedium und Verfahren zum Auslesen desselben
KR0157654B1 (ko) * 1993-12-17 1998-12-15 쯔지 하루오 광자기 기록매체 및 이것을 이용한 광자기 기록 정보의 재생방법
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
JPH07230637A (ja) * 1994-02-18 1995-08-29 Canon Inc 光磁気記録媒体および該媒体を用いた情報記録再生方法
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US5805551A (en) * 1994-04-18 1998-09-08 Matsushita Electric Industrial Co., Ltd. Method and apparatus for preventing illegal copy or illegal installation of information of optical recording medium
JPH07311986A (ja) * 1994-05-18 1995-11-28 Matsushita Electric Ind Co Ltd 光磁気記録媒体
EP0686970A3 (de) * 1994-06-10 1996-07-24 Canon Kk Magneto-optisches Aufzeichnungsmedium und Wiedergabemethode dafür
JP3243126B2 (ja) * 1994-08-11 2002-01-07 パイオニア株式会社 光磁気記録媒体
JP3429877B2 (ja) * 1994-12-27 2003-07-28 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
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Also Published As

Publication number Publication date
EP0415449B1 (de) 1995-04-12
US5168482A (en) 1992-12-01
DE69018544T2 (de) 1995-12-21
EP0415449A2 (de) 1991-03-06
EP0415449A3 (en) 1992-04-01

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