DE69421225D1 - Optische Abtastvorrichtung für magnetooptischen Aufzeichnungsträger - Google Patents

Optische Abtastvorrichtung für magnetooptischen Aufzeichnungsträger

Info

Publication number
DE69421225D1
DE69421225D1 DE69421225T DE69421225T DE69421225D1 DE 69421225 D1 DE69421225 D1 DE 69421225D1 DE 69421225 T DE69421225 T DE 69421225T DE 69421225 T DE69421225 T DE 69421225T DE 69421225 D1 DE69421225 D1 DE 69421225D1
Authority
DE
Germany
Prior art keywords
magneto
scanning device
recording media
optical
optical 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 - Fee Related
Application number
DE69421225T
Other languages
English (en)
Other versions
DE69421225T2 (de
Inventor
Kimihiro Saito
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
Application filed by Sony Corp filed Critical Sony Corp
Publication of DE69421225D1 publication Critical patent/DE69421225D1/de
Application granted granted Critical
Publication of DE69421225T2 publication Critical patent/DE69421225T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • G11B11/10532—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
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record 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
    • G11B11/1055—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
    • G11B11/10578—Servo format, e.g. prepits, guide tracks, pilot signals
DE69421225T 1993-08-06 1994-08-04 Optische Abtastvorrichtung für magnetooptischen Aufzeichnungsträger Expired - Fee Related DE69421225T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP19501493A JP3541893B2 (ja) 1993-08-06 1993-08-06 光磁気記録媒体再生装置

Publications (2)

Publication Number Publication Date
DE69421225D1 true DE69421225D1 (de) 1999-11-25
DE69421225T2 DE69421225T2 (de) 2000-02-03

Family

ID=16334101

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69421225T Expired - Fee Related DE69421225T2 (de) 1993-08-06 1994-08-04 Optische Abtastvorrichtung für magnetooptischen Aufzeichnungsträger

Country Status (6)

Country Link
US (1) US5528575A (de)
EP (1) EP0638896B1 (de)
JP (1) JP3541893B2 (de)
KR (1) KR100282507B1 (de)
DE (1) DE69421225T2 (de)
MY (1) MY114127A (de)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6236625B1 (en) 1991-02-15 2001-05-22 Discovision Associates Optical disc system having current monitoring circuit with controller for laser driver and method for operating same
US5677899A (en) 1991-02-15 1997-10-14 Discovision Associates Method for moving carriage assembly from initial position to target position relative to storage medium
US5729511A (en) 1991-02-15 1998-03-17 Discovision Associates Optical disc system having servo motor and servo error detection assembly operated relative to monitored quad sum signal
US6434087B1 (en) 1995-01-25 2002-08-13 Discovision Associates Optical disc system and method for controlling bias coil and light source to process information on a storage medium
JPH08321088A (ja) * 1995-05-25 1996-12-03 Sony Corp 光学ピックアップ
JP3322075B2 (ja) * 1995-06-02 2002-09-09 松下電器産業株式会社 光磁気ピックアップ
US5767507A (en) * 1996-07-15 1998-06-16 Trustees Of Boston University Polarization sensitive photodetectors and detector arrays
JP3708320B2 (ja) * 1998-02-04 2005-10-19 富士通株式会社 光情報検出装置
JP4140104B2 (ja) 1998-12-09 2008-08-27 ソニー株式会社 光学ヘッド及び記録再生装置
JP4251527B2 (ja) * 2001-10-15 2009-04-08 独立行政法人産業技術総合研究所 光情報媒体の再生方法および再生装置
US20050207324A1 (en) * 2003-05-23 2005-09-22 Fujitsu Limited Magneto-optical recording medium and method of making the same and magneto-optical recording medium drive

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2504734B2 (ja) * 1983-11-08 1996-06-05 シャープ株式会社 光磁気記憶装置の光学装置
JPS613343A (ja) * 1984-06-15 1986-01-09 Nec Home Electronics Ltd 磁気光学式光再生ヘツド
US4858218A (en) * 1984-09-12 1989-08-15 Nikon Corporation Optical recording medium and reproducing apparatus
JPH0677351B2 (ja) * 1986-11-15 1994-09-28 ソニー株式会社 光学ピツクアツプ装置
US5060212A (en) * 1987-08-17 1991-10-22 Ricoh Company, Ltd. Integrated optical pick-up device
EP0331476A1 (de) * 1988-03-03 1989-09-06 Canon Kabushiki Kaisha Magneto-optisches Informationswiedergabegerät mit polarisierendem Strahlteiler, dessen Inklination, bezüglich auf die anderen Bauteile, 45 Grad ist
JP2786484B2 (ja) * 1989-01-25 1998-08-13 オリンパス光学工業株式会社 光磁気再生装置
JP2902415B2 (ja) * 1989-09-14 1999-06-07 シャープ株式会社 光学ヘッド
JPH03263636A (ja) * 1990-03-14 1991-11-25 Hitachi Ltd 光ヘッド
US5216562A (en) * 1990-09-25 1993-06-01 International Business Machines Corporation Multi-beam optical recording system and method
JPH05109143A (ja) * 1991-10-18 1993-04-30 Sony Corp 光学ピツクアツプ装置
JP3319611B2 (ja) * 1991-12-11 2002-09-03 ソニー株式会社 光磁気ヘツド及び光磁気デイスク装置
US5251198A (en) * 1992-05-29 1993-10-05 Strickler James H Reading device for multi-layered optical information carrier

Also Published As

Publication number Publication date
MY114127A (en) 2002-08-30
JPH0757320A (ja) 1995-03-03
EP0638896A1 (de) 1995-02-15
JP3541893B2 (ja) 2004-07-14
KR950006733A (ko) 1995-03-21
KR100282507B1 (ko) 2001-02-15
US5528575A (en) 1996-06-18
DE69421225T2 (de) 2000-02-03
EP0638896B1 (de) 1999-10-20

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee