DE68914821D1 - Magneto-optisches aufzeichnungsgerät vom überschreibenden typ. - Google Patents

Magneto-optisches aufzeichnungsgerät vom überschreibenden typ.

Info

Publication number
DE68914821D1
DE68914821D1 DE68914821T DE68914821T DE68914821D1 DE 68914821 D1 DE68914821 D1 DE 68914821D1 DE 68914821 T DE68914821 T DE 68914821T DE 68914821 T DE68914821 T DE 68914821T DE 68914821 D1 DE68914821 D1 DE 68914821D1
Authority
DE
Germany
Prior art keywords
magneto
optical recording
recording type
type
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 - Fee Related
Application number
DE68914821T
Other languages
English (en)
Other versions
DE68914821T2 (de
Inventor
Masatoshi Sato
Toshihiko Kawai
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.)
Nikon Corp
Original Assignee
Nikon 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 Nikon Corp filed Critical Nikon Corp
Publication of DE68914821D1 publication Critical patent/DE68914821D1/de
Application granted granted Critical
Publication of DE68914821T2 publication Critical patent/DE68914821T2/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
    • G11B11/10519—Direct overwriting, i.e. performing erasing and recording using the same transducing means
    • 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
    • G11B11/10595—Control of operating function
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
    • G11B19/02—Control of operating function, e.g. switching from recording to reproducing
    • G11B19/12—Control of operating function, e.g. switching from recording to reproducing by sensing distinguishing features of or on records, e.g. diameter end mark
DE68914821T 1988-08-11 1989-08-11 Magneto-optisches aufzeichnungsgerät vom überschreibenden typ. Expired - Lifetime DE68914821T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP63200923A JPH0250336A (ja) 1988-08-11 1988-08-11 兼用可能なオーバーライト型光磁気記録装置
PCT/JP1989/000815 WO1990001769A1 (en) 1988-08-11 1989-08-11 Overwrite type magnetooptical recording apparatus

Publications (2)

Publication Number Publication Date
DE68914821D1 true DE68914821D1 (de) 1994-05-26
DE68914821T2 DE68914821T2 (de) 1994-10-20

Family

ID=16432525

Family Applications (1)

Application Number Title Priority Date Filing Date
DE68914821T Expired - Lifetime DE68914821T2 (de) 1988-08-11 1989-08-11 Magneto-optisches aufzeichnungsgerät vom überschreibenden typ.

Country Status (5)

Country Link
US (1) US5164925A (de)
EP (1) EP0380708B1 (de)
JP (1) JPH0250336A (de)
DE (1) DE68914821T2 (de)
WO (1) WO1990001769A1 (de)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04105284A (ja) * 1990-08-24 1992-04-07 Sony Corp 光ディスク記録及び／又は再生装置
JP2972899B2 (ja) * 1991-01-24 1999-11-08 株式会社リコー 光磁気記録方法
JPH05101472A (ja) * 1991-10-09 1993-04-23 Sony Corp 光磁気記録再生方式
US5771217A (en) * 1993-05-27 1998-06-23 Copal Company Limited Magneto-optical disk apparatus having a ejector arm and magnetic field generating means mounted on a stationary base
US5730911A (en) * 1995-03-03 1998-03-24 Essilor International-Compagnie General D'optique Process for the manufacture of a substrate made of transparent organic glass and substrate thus obtained
JP2005050400A (ja) * 2003-07-30 2005-02-24 Canon Inc 光磁気記録媒体

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59152502A (ja) * 1983-02-18 1984-08-31 Canon Inc 光磁気記録装置
JPS6010401A (ja) * 1983-06-30 1985-01-19 Fujitsu Ltd 光磁気デイスク装置
JP2521908B2 (ja) * 1985-06-11 1996-08-07 株式会社ニコン オ―バ―ライト可能な光磁気記録方法、それに使用される光磁気記録装置及び光磁気記録媒体、並びに変調方法、変調装置及び光磁気記録媒体
JPS6266451A (ja) * 1985-09-18 1987-03-25 Matsushita Electric Ind Co Ltd 光磁気デイスク装置
JPH071560B2 (ja) * 1985-09-20 1995-01-11 オリンパス光学工業株式会社 光学式記録再生装置
ATE172047T1 (de) * 1986-07-08 1998-10-15 Canon Kk Magnetoptisches aufzeichnungsmedium mit der möglichkeit des überschreibens mit zwei oder mehr magnetschichten und dieses medium verwendende aufzeichnungsmethode
JPS6320702A (ja) * 1986-07-14 1988-01-28 Seiko Epson Corp 光磁気記録装置のバイアス磁界印加機構
JP2566924B2 (ja) * 1986-07-14 1996-12-25 キヤノン株式会社 光磁気記録装置
JP2574247B2 (ja) * 1986-07-15 1997-01-22 パイオニア株式会社 光磁気情報記録装置
JPS6391864A (ja) * 1986-10-06 1988-04-22 Canon Inc 情報記録再生装置
JP2570270B2 (ja) * 1986-10-08 1997-01-08 株式会社ニコン ツービームによる光磁気記録方法及び装置
JPH0661122B2 (ja) * 1987-05-08 1994-08-10 シャープ株式会社 光磁気ディスク装置
JP2754537B2 (ja) * 1987-05-18 1998-05-20 株式会社ニコン 光磁気記録媒体並びにそれを使用したビット形成方法
JPS63291237A (ja) * 1987-05-21 1988-11-29 Mitsubishi Electric Corp 光磁気記録再生用情報担体装置
EP0388452A1 (de) * 1988-09-29 1990-09-26 Sundstrand Data Control, Inc. Verbindungsfreies, hermetisch geschlossenes optisches plattensystem

Also Published As

Publication number Publication date
WO1990001769A1 (en) 1990-02-22
EP0380708A4 (en) 1992-03-25
DE68914821T2 (de) 1994-10-20
JPH0250336A (ja) 1990-02-20
EP0380708A1 (de) 1990-08-08
EP0380708B1 (de) 1994-04-20
US5164925A (en) 1992-11-17

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8328 Change in the person/name/address of the agent

Free format text: DRES. WESER UND MARTIN, 81245 MUENCHEN

8328 Change in the person/name/address of the agent

Free format text: WESER & KOLLEGEN, 81245 MUENCHEN

8339 Ceased/non-payment of the annual fee