DE3885352T2 - Einrichtung und Verfahren zur Wiedergabe von magneto-optischen Platten. - Google Patents

Einrichtung und Verfahren zur Wiedergabe von magneto-optischen Platten.

Info

Publication number
DE3885352T2
DE3885352T2 DE88109195T DE3885352T DE3885352T2 DE 3885352 T2 DE3885352 T2 DE 3885352T2 DE 88109195 T DE88109195 T DE 88109195T DE 3885352 T DE3885352 T DE 3885352T DE 3885352 T2 DE3885352 T2 DE 3885352T2
Authority
DE
Germany
Prior art keywords
optical disks
reproducing magneto
magneto
reproducing
disks
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
DE88109195T
Other languages
English (en)
Other versions
DE3885352D1 (de
Inventor
Shigeru Shimonou
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.)
NEC Corp
Original Assignee
NEC 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 NEC Corp filed Critical NEC Corp
Application granted granted Critical
Publication of DE3885352D1 publication Critical patent/DE3885352D1/de
Publication of DE3885352T2 publication Critical patent/DE3885352T2/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
    • 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
DE88109195T 1987-06-17 1988-06-09 Einrichtung und Verfahren zur Wiedergabe von magneto-optischen Platten. Expired - Fee Related DE3885352T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62151809A JPH073710B2 (ja) 1987-06-17 1987-06-17 光磁気ディスク装置

Publications (2)

Publication Number Publication Date
DE3885352D1 DE3885352D1 (de) 1993-12-09
DE3885352T2 true DE3885352T2 (de) 1994-05-11

Family

ID=15526782

Family Applications (1)

Application Number Title Priority Date Filing Date
DE88109195T Expired - Fee Related DE3885352T2 (de) 1987-06-17 1988-06-09 Einrichtung und Verfahren zur Wiedergabe von magneto-optischen Platten.

Country Status (4)

Country Link
US (1) US5105399A (de)
EP (1) EP0295572B1 (de)
JP (1) JPH073710B2 (de)
DE (1) DE3885352T2 (de)

Families Citing this family (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1316597C (en) * 1988-07-20 1993-04-20 Takeshi Yamaguchi Magneto-optical memory apparatus and optical memory apparatus
US5218586A (en) * 1989-04-17 1993-06-08 Mitsubishi Denki Kabushiki Kaisha Optical recording and reproducing apparatus
JP2744635B2 (ja) * 1989-04-17 1998-04-28 三菱電機株式会社 光記録再生装置
JP2657959B2 (ja) * 1989-09-29 1997-09-30 インターナショナル・ビジネス・マシーンズ・コーポレーション 磁気光学的記憶装置における光学的な遷移を検出する検出装置
US5712840A (en) * 1990-03-16 1998-01-27 Canon Kabushiki Kaisha Optical information recording/reproduciing apparatus having two-division detectors
DE69126160T2 (de) * 1990-03-16 1997-10-09 Canon Kk Aufzeichnungs-/Wiedergabegerät für optische Information
US5835472A (en) * 1990-07-31 1998-11-10 Omron Corporation Optical pickup device with substantially mutually orthogonal reflection surfaces
JP3063805B2 (ja) * 1991-02-25 2000-07-12 オリンパス光学工業株式会社 光学式情報再生装置および記録媒体
US5235590A (en) * 1991-03-20 1993-08-10 Fujitsu Limited Read out apparatus for reading out information from magneto-optic disk
US5309422A (en) * 1991-06-10 1994-05-03 Alps Electric Co., Ltd. Light separation element and light receiving optical device using same
DE4140806A1 (de) * 1991-12-11 1993-06-17 Thomson Brandt Gmbh Optische abtastvorrichtung
US5282188A (en) * 1992-02-18 1994-01-25 Eastman Kodak Company Apparatus and method for optimizing performance in read/write head of an optical storage system with a magneto-optical storage medium
US5349576A (en) * 1992-07-27 1994-09-20 Eastman Kodak Company Apparatus and method for polarization switching of a readout beam in a magneto-optic storage system
DE4226777A1 (de) * 1992-08-13 1994-02-17 Thomson Brandt Gmbh Rauschanteilverringerung im Datensignal und optische Abtastvorrichtung
US5610897A (en) * 1992-08-31 1997-03-11 Canon Kabushiki Kaisha Optical information reproducing apparatus
JP3095546B2 (ja) * 1992-09-10 2000-10-03 キヤノン株式会社 光学的情報記録再生装置
JP2618571B2 (ja) * 1992-09-24 1997-06-11 富士通株式会社 光磁気ディスクのデータ再生回路
JPH06314438A (ja) * 1993-03-05 1994-11-08 Olympus Optical Co Ltd 光学ヘッド
US5598389A (en) * 1993-09-03 1997-01-28 Olympus Optical Co., Ltd. Signal detector for an optical information reproducing apparatus
US5477514A (en) * 1993-09-07 1995-12-19 Matsushita Electric Industrial Co., Ltd. Control apparatus for controlling focusing, accessing and spindle rotating circuits to operate simultaneously
JPH07129992A (ja) * 1993-11-06 1995-05-19 Asahi Optical Co Ltd 情報記録再生装置
KR960006101B1 (ko) * 1993-11-11 1996-05-08 대우전자주식회사 광자기 디스크재생시스템의 광픽업장치
JPH07169129A (ja) * 1993-12-13 1995-07-04 Canon Inc 光ヘッド
US5828630A (en) * 1997-05-07 1998-10-27 Eastman Kodak Company Diffraction-based direct read during write using magneto-optic recording media
US5986997A (en) * 1997-09-10 1999-11-16 Imation Corp. Updatable optical data storage disc having reduced crosstalk between tracks, and drive for same
DE19756457A1 (de) * 1997-12-18 1999-06-24 Thomson Brandt Gmbh Verfahren zur Korrektur eines Spurfehlersignals beim optischen Abtasten eines plattenförmigen Aufzeichnungsträgers

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8101932A (nl) * 1981-04-21 1982-11-16 Philips Nv Inrichting voor het inschrijven en uitlezen van informatiesporen in een optische registratiedrager.
JPS6053863A (ja) * 1983-09-05 1985-03-27 Sony Corp 磁気記録媒体の磁化方向検出装置
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
JPS615459A (ja) * 1984-06-18 1986-01-11 Nec Home Electronics Ltd 磁気光学式再生装置
JPS61104348A (ja) * 1984-10-22 1986-05-22 Nec Corp 光磁気ヘツド
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
DE3688669T2 (de) * 1985-10-08 1993-12-16 Sharp Kk Magnetooptische Speichervorrichtung.
JPS62134839A (ja) * 1985-12-09 1987-06-17 Hitachi Ltd 光磁気再生装置
US4847824A (en) * 1987-12-21 1989-07-11 International Business Machines Corporation Readback circuits for magnetooptic players

Also Published As

Publication number Publication date
JPH073710B2 (ja) 1995-01-18
JPS63313335A (ja) 1988-12-21
EP0295572B1 (de) 1993-11-03
EP0295572A2 (de) 1988-12-21
EP0295572A3 (en) 1990-07-04
US5105399A (en) 1992-04-14
DE3885352D1 (de) 1993-12-09

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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