JPH02110003U - - Google Patents

Info

Publication number
JPH02110003U
JPH02110003U JP1989015524U JP1552489U JPH02110003U JP H02110003 U JPH02110003 U JP H02110003U JP 1989015524 U JP1989015524 U JP 1989015524U JP 1552489 U JP1552489 U JP 1552489U JP H02110003 U JPH02110003 U JP H02110003U
Authority
JP
Japan
Prior art keywords
permanent magnet
magneto
optical disk
mode
magnetic field
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.)
Granted
Application number
JP1989015524U
Other languages
English (en)
Other versions
JPH0636481Y2 (ja
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 filed Critical
Priority to JP1989015524U priority Critical patent/JPH0636481Y2/ja
Priority to US07/477,295 priority patent/US5038330A/en
Publication of JPH02110003U publication Critical patent/JPH02110003U/ja
Application granted granted Critical
Publication of JPH0636481Y2 publication Critical patent/JPH0636481Y2/ja
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
    • G11B11/10595—Control of operating function
    • 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
    • G11B11/1055—Disposition or mounting of transducers relative to record carriers
    • G11B11/10556—Disposition or mounting of transducers relative to record carriers with provision for moving or switching or masking the transducers in or out of their operative position
    • G11B11/1056—Switching or mechanically reversing the magnetic field generator

Landscapes

  • Recording Or Reproducing By Magnetic Means (AREA)

Description

【図面の簡単な説明】
第１図は本考案の光磁気デイスク装置のバイア
ス磁界印加装置の一実施例の原理構成図、第２図
は第１図中永久磁石がデイスクに平行とされた状
態を示す図、第３図は第１図中永久磁石を支持す
る部分及びこれを回転させる部分の具体的構成を
示す図、第４図は第１図中システムコントローラ
の動作を説明するフローチヤート、第５図は第１
図の装置の動作を示すタイムチヤート、第６図は
従来例を示す図である。 １０…バイアス磁界印加装置、１１…永久磁石
、１２…ステツピングモータ、１３…スピンドル
、１４…光磁気デイスク、１５…遮光デイスク、
１５ａ…遮光部、１５ｂ…透過部、１６…ホトイ
ンタラプタ、１７…光学的検出手段、２０…ＣＰ
Ｕ、２１…システムコントローラ、２２…インタ
フエース、２３…モータ駆動回路、２４…制御手
段。

Claims (1)

  1. 【実用新案登録請求の範囲】 光磁気デイスク装置のモードに応じて永久磁石
    の回動位置を変えてデイスクに上記モードに応じ
    た磁界を印加する光磁気デイスク装置のバイアス
    磁界印加装置において、 永久磁石を回動させるステツピングモータと、 該永久磁石の磁極が上記デイスクに対向して該
    永久磁石が上記デイスクに対して垂直となる回動
    位置を光学的に検出する手段と、 該光学的検出手段よりの信号により上記ステツ
    ピングモータを停止させると共に、消去モード及
    び記録モードの終了に応じて上記永久磁石をその
    ときの位置より実質上９０度回動させるように上
    記ステツピングモータを駆動させる制御手段とよ
    りなる構成の光磁気デイスク装置のバイアス磁界
    印加装置。
JP1989015524U 1989-02-13 1989-02-13 光磁気ディスク装置のバイアス磁界印加装置 Expired - Lifetime JPH0636481Y2 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP1989015524U JPH0636481Y2 (ja) 1989-02-13 1989-02-13 光磁気ディスク装置のバイアス磁界印加装置
US07/477,295 US5038330A (en) 1989-02-13 1990-02-08 Bias magnetic field impress apparatus for opto-magnetic disk apparatus including permanent magnet

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1989015524U JPH0636481Y2 (ja) 1989-02-13 1989-02-13 光磁気ディスク装置のバイアス磁界印加装置

Publications (2)

Publication Number Publication Date
JPH02110003U true JPH02110003U (ja) 1990-09-03
JPH0636481Y2 JPH0636481Y2 (ja) 1994-09-21

Family

ID=11891200

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1989015524U Expired - Lifetime JPH0636481Y2 (ja) 1989-02-13 1989-02-13 光磁気ディスク装置のバイアス磁界印加装置

Country Status (2)

Country Link
US (1) US5038330A (ja)
JP (1) JPH0636481Y2 (ja)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69027754T2 (de) * 1989-12-28 1996-12-05 Matsushita Electric Ind Co Ltd Vormagnetisierungsfeld-Erzeugungsgerät
JPH0487002A (ja) * 1990-07-31 1992-03-19 Toshiba Corp 情報記録媒体処理装置
US5345431A (en) * 1992-09-14 1994-09-06 Hewlett-Packard Company Write and erase assembly for magneto-optic drive apparatus

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5954003A (ja) * 1982-09-21 1984-03-28 Sharp Corp 熱磁気記録装置
JPS613305A (ja) * 1984-06-15 1986-01-09 Fujitsu Ltd 光磁気記録用バイアス磁界発生装置

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3650686T2 (de) * 1985-04-29 1998-10-22 Sony Corp Externes Magnetfeld-Umpolungsgerät für magneto-optisches Plattengerät
US4742213A (en) * 1985-05-23 1988-05-03 American Magnetics Corporation Credit card reading apparatus with reliable optical path interrupt means
US4701895A (en) * 1986-03-28 1987-10-20 Rca Corporation Magnetic biasing apparatus for magneto-optic recording including a permanent magnet
US4789972A (en) * 1986-12-22 1988-12-06 International Business Machines Corporation Selectively controlling the erasure in a magneto-optic recording medium
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

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5954003A (ja) * 1982-09-21 1984-03-28 Sharp Corp 熱磁気記録装置
JPS613305A (ja) * 1984-06-15 1986-01-09 Fujitsu Ltd 光磁気記録用バイアス磁界発生装置

Also Published As

Publication number Publication date
JPH0636481Y2 (ja) 1994-09-21
US5038330A (en) 1991-08-06

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