ATE172048T1 - Magnetooptisches informationsaufzeichnungs- und - wiedergabegerät - Google Patents

Magnetooptisches informationsaufzeichnungs- und - wiedergabegerät

Info

Publication number
ATE172048T1
ATE172048T1 AT93300750T AT93300750T ATE172048T1 AT E172048 T1 ATE172048 T1 AT E172048T1 AT 93300750 T AT93300750 T AT 93300750T AT 93300750 T AT93300750 T AT 93300750T AT E172048 T1 ATE172048 T1 AT E172048T1
Authority
AT
Austria
Prior art keywords
light
information recording
magnetoptical
playbacking
component produced
Prior art date
Application number
AT93300750T
Other languages
English (en)
Inventor
Masakuni C O Canon Ka Yamamoto
Susumu C O Canon Kab Matsumura
Hiroaki C O Canon Kabush Hoshi
Eiji C O Canon Kabus Yamaguchi
Original Assignee
Canon Kk
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 JP04779092A external-priority patent/JP3144588B2/ja
Priority claimed from JP04778992A external-priority patent/JP3144587B2/ja
Priority claimed from JP16553392A external-priority patent/JPH05334751A/ja
Priority claimed from JP4269096A external-priority patent/JPH0696491A/ja
Application filed by Canon Kk filed Critical Canon Kk
Application granted granted Critical
Publication of ATE172048T1 publication Critical patent/ATE172048T1/de

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
    • G11B11/10504—Recording
    • G11B11/10508—Recording by modulating only the magnetic field at the transducer
    • 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
    • G11B11/10532—Heads
    • G11B11/10541—Heads for reproducing
    • G11B11/10543—Heads for reproducing using optical beam of radiation
    • 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
    • G11B11/10576—Disposition or mounting of transducers relative to record carriers with provision for moving the transducers for maintaining alignment or spacing relative to the carrier
    • 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
    • G11B11/10597—Adaptations for transducing various formats on the same or different carriers
    • 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
AT93300750T 1992-02-05 1993-02-02 Magnetooptisches informationsaufzeichnungs- und - wiedergabegerät ATE172048T1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP04779092A JP3144588B2 (ja) 1992-02-05 1992-02-05 光磁気情報再生装置
JP04778992A JP3144587B2 (ja) 1992-02-05 1992-02-05 光磁気情報再生装置
JP16553392A JPH05334751A (ja) 1992-06-02 1992-06-02 光磁気記録再生装置
JP4269096A JPH0696491A (ja) 1992-09-14 1992-09-14 光磁気情報再生装置

Publications (1)

Publication Number Publication Date
ATE172048T1 true ATE172048T1 (de) 1998-10-15

Family

ID=27462101

Family Applications (1)

Application Number Title Priority Date Filing Date
AT93300750T ATE172048T1 (de) 1992-02-05 1993-02-02 Magnetooptisches informationsaufzeichnungs- und - wiedergabegerät

Country Status (4)

Country Link
US (2) US5577017A (de)
EP (1) EP0555049B1 (de)
AT (1) ATE172048T1 (de)
DE (1) DE69321380T2 (de)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69321380T2 (de) * 1992-02-05 1999-04-08 Canon K.K., Tokio/Tokyo Magnetooptisches Informationsaufzeichnungs- und -wiedergabegerät
JPH07182705A (ja) * 1993-12-21 1995-07-21 Fujitsu Ltd 光磁気媒体及びその再生装置
JPH1074344A (ja) * 1996-06-26 1998-03-17 So Fukada 磁気光学データ記録の再生装置
JPH1092046A (ja) * 1996-09-19 1998-04-10 Canon Inc 光磁気情報再生装置
WO1998027553A1 (fr) * 1996-12-19 1998-06-25 Matsushita Electric Industrial Co., Ltd. Disque optique, procede d'enregistrement et lecture sur disque optique d'information non effaçable, dispositif de lecture de disque optique, dispositif d'enregistrement et lecture de disque optique, dispositif d'enregistrement d'information non effaçable sur disque optique et dispositif d'enregistrement de disque optique
JPH11134732A (ja) 1997-08-29 1999-05-21 Canon Inc 情報記録再生方法
US6298015B1 (en) 1998-06-03 2001-10-02 Canon Kabushiki Kaisha Magneto-optical reproducing method using a magnified magnetic domain
US6487148B1 (en) * 1999-08-04 2002-11-26 Terastor Corp. Edge detection for servo signals in optical storage system
US6829208B1 (en) 1999-08-18 2004-12-07 Matsushita Electric Industrial Co., Ltd. Optical disk reproducing method and reproducing device
CN1333397C (zh) * 2001-12-14 2007-08-22 松下电器产业株式会社 光学信息再现方法、光学头设备以及光学信息处理装置
JP4228666B2 (ja) * 2002-11-25 2009-02-25 ソニー株式会社 光学ピックアップ装置、記録再生装置及びギャップ検出方法
JP2004259328A (ja) * 2003-02-24 2004-09-16 Pioneer Electronic Corp 光ピックアップ並びにこれを備えた情報再生装置
JP2005346843A (ja) * 2004-06-03 2005-12-15 Canon Inc 光学的情報記録再生方法及び装置
US7599272B2 (en) * 2004-11-22 2009-10-06 Canon Kabushiki Kaisha Method and apparatus for recording and reproducing multi-level information
US7804754B2 (en) 2005-08-31 2010-09-28 Canon Kabushiki Kaisha Optical information recording/reproducing method
JP2009087423A (ja) * 2007-09-28 2009-04-23 Sony Optiarc Inc 光ピックアップ装置、光記録媒体駆動装置及び信号の記録／再生方法

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5829151A (ja) * 1981-08-12 1983-02-21 Nec Corp 光学的記録再生装置における焦点誤差検出装置
JPS6282525A (ja) * 1985-10-08 1987-04-16 Toshiba Corp 光学ヘツド
DE3887601T2 (de) * 1987-08-31 1994-06-09 Canon Kk Informationsaufnahme- und/oder -wiedergabegerät mit Mitteln zur Feststellung aller Spurfolgefehler.
US5043960A (en) * 1987-09-25 1991-08-27 Hitachi, Ltd. Overwritable magneto-optic recording and reproducing apparatus
US5153868A (en) * 1988-02-26 1992-10-06 Sumitomo Metal Industries, Ltd. Magneto-optic recording and regenerating device
JPH01311428A (ja) * 1988-06-09 1989-12-15 Matsushita Electric Ind Co Ltd 光ヘッド装置及びこれを用いた光情報装置
CA1316597C (en) * 1988-07-20 1993-04-20 Takeshi Yamaguchi Magneto-optical memory apparatus and optical memory apparatus
US4982383A (en) * 1988-09-30 1991-01-01 Texaco Inc. Downhole ultrasonic transit-time flowmetering means and method
JP2805790B2 (ja) * 1989-01-26 1998-09-30 ソニー株式会社 光磁気記録媒体の信号検出装置
DE69321380T2 (de) * 1992-02-05 1999-04-08 Canon K.K., Tokio/Tokyo Magnetooptisches Informationsaufzeichnungs- und -wiedergabegerät

Also Published As

Publication number Publication date
DE69321380D1 (de) 1998-11-12
EP0555049A2 (de) 1993-08-11
US5577017A (en) 1996-11-19
DE69321380T2 (de) 1999-04-08
EP0555049B1 (de) 1998-10-07
EP0555049A3 (en) 1993-12-08
US5768219A (en) 1998-06-16

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