DE68912149T2 - Optisches Informationsverarbeitungsgerät. - Google Patents

Optisches Informationsverarbeitungsgerät.

Info

Publication number
DE68912149T2
DE68912149T2 DE89301181T DE68912149T DE68912149T2 DE 68912149 T2 DE68912149 T2 DE 68912149T2 DE 89301181 T DE89301181 T DE 89301181T DE 68912149 T DE68912149 T DE 68912149T DE 68912149 T2 DE68912149 T2 DE 68912149T2
Authority
DE
Germany
Prior art keywords
information processing
processing device
optical information
optical
processing
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
DE89301181T
Other languages
English (en)
Other versions
DE68912149D1 (de
Inventor
Yasuo Suzuki
Shigeru Aoi
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Publication of DE68912149D1 publication Critical patent/DE68912149D1/de
Application granted granted Critical
Publication of DE68912149T2 publication Critical patent/DE68912149T2/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
    • G11B11/10534—Heads for recording by magnetising, demagnetising or transfer of magnetisation, by radiation, e.g. for thermomagnetic recording
    • G11B11/10536—Heads for recording by magnetising, demagnetising or transfer of magnetisation, by radiation, e.g. for thermomagnetic recording using thermic beams, e.g. lasers
    • 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
    • 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
    • G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B7/0901—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for track following only
    • 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
    • G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B7/0908—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for focusing only
    • G11B7/0909—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for focusing only by astigmatic methods
    • 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
    • G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B7/094—Methods and circuits for servo offset compensation
    • 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
    • G11B7/10—Interchangeable mountings, e.g. for replacement of head without readjustment including interchangeable electrical adjuster boards
    • 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
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Head (AREA)
  • Optical Recording Or Reproduction (AREA)
DE89301181T 1988-02-08 1989-02-08 Optisches Informationsverarbeitungsgerät. Expired - Fee Related DE68912149T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63025795A JPH01204234A (ja) 1988-02-08 1988-02-08 光学的情報記録再生装置

Publications (2)

Publication Number Publication Date
DE68912149D1 DE68912149D1 (de) 1994-02-24
DE68912149T2 true DE68912149T2 (de) 1994-05-05

Family

ID=12175773

Family Applications (1)

Application Number Title Priority Date Filing Date
DE89301181T Expired - Fee Related DE68912149T2 (de) 1988-02-08 1989-02-08 Optisches Informationsverarbeitungsgerät.

Country Status (4)

Country Link
US (1) US5099468A (de)
EP (1) EP0328354B1 (de)
JP (1) JPH01204234A (de)
DE (1) DE68912149T2 (de)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100254716B1 (ko) * 1990-04-05 2000-05-01 이데이 노부유끼 광학식 디스크상의 정보기록 및 재생장치
JPH0423234A (ja) * 1990-05-18 1992-01-27 Sony Corp 光学装置のトラッキング誤差信号生成装置
JPH0438723A (ja) * 1990-06-04 1992-02-07 Canon Inc 光学式ディスク装置
JP3004036B2 (ja) * 1990-08-07 2000-01-31 旭光学工業株式会社 光ディスク装置のｆ／ｔクロストーク補正方法
JPH04113523A (ja) * 1990-08-31 1992-04-15 Sharp Corp 光スポット位置検出装置および光ピックアップ
US5297114A (en) * 1990-11-30 1994-03-22 Asahi Kogaku Kogyo Kabushiki Kaisha Magneto-optic recording/reproduction apparatus for minimizing variation in focusing error signals caused by variation in optical source wavelength
JP2682748B2 (ja) * 1991-03-05 1997-11-26 富士通株式会社 光記録媒体のトラック横断信号作成回路
CA2140065C (en) * 1994-01-18 2004-03-02 Leviton Manufacturing Co., Inc. Solid state motor speed control
ATE364223T1 (de) * 2002-12-20 2007-06-15 Koninkl Philips Electronics Nv Anordnung zum lesen eines informationsträgers
KR100930649B1 (ko) * 2008-04-17 2009-12-09 삼성전기주식회사 디스크 드라이브

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1532345A (en) * 1976-06-25 1978-11-15 Hitachi Ltd Information play-back apparatus
US4607157A (en) * 1984-02-09 1986-08-19 Xerox Corporation Automatic focus offset correction system
JPS60167131A (ja) * 1984-02-09 1985-08-30 Mitsubishi Electric Corp 光学式情報記録再生装置の光学機構
JPS60227121A (ja) * 1984-04-24 1985-11-12 Graphtec Corp 記録計器
JPS6251038A (ja) * 1985-08-30 1987-03-05 Canon Inc 光学的情報記録再生装置
JPS6278732A (ja) * 1985-10-01 1987-04-11 Olympus Optical Co Ltd 光学的情報記録再生装置
JPH0683358B2 (ja) * 1985-10-17 1994-10-19 キヤノン株式会社 画像情報処理装置の調整方法
CA1261467A (en) * 1985-11-28 1989-09-26 Akira Minami Focus servomechanism control system of optical disc system having offset setting means

Also Published As

Publication number Publication date
EP0328354A2 (de) 1989-08-16
DE68912149D1 (de) 1994-02-24
US5099468A (en) 1992-03-24
EP0328354A3 (de) 1991-03-20
EP0328354B1 (de) 1994-01-12
JPH01204234A (ja) 1989-08-16

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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