DE69015675D1 - Gerät zur optischen Aufzeichnung und Wiedergabe. - Google Patents

Gerät zur optischen Aufzeichnung und Wiedergabe.

Info

Publication number
DE69015675D1
DE69015675D1 DE69015675T DE69015675T DE69015675D1 DE 69015675 D1 DE69015675 D1 DE 69015675D1 DE 69015675 T DE69015675 T DE 69015675T DE 69015675 T DE69015675 T DE 69015675T DE 69015675 D1 DE69015675 D1 DE 69015675D1
Authority
DE
Germany
Prior art keywords
playback
optical recording
recording
optical
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
DE69015675T
Other languages
English (en)
Other versions
DE69015675T2 (de
Inventor
Hitoshi Imai
Michihiro Tadokoro
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Publication of DE69015675D1 publication Critical patent/DE69015675D1/de
Application granted granted Critical
Publication of DE69015675T2 publication Critical patent/DE69015675T2/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
    • 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
    • G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
    • G11B7/1356—Double or multiple prisms, i.e. having two or more prisms in cooperation
    • 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
    • G11B7/09—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
    • G11B7/0916—Foucault or knife-edge methods

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Optical Head (AREA)
DE69015675T 1989-04-06 1990-04-04 Gerät zur optischen Aufzeichnung und Wiedergabe. Expired - Fee Related DE69015675T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1085763A JPH02265028A (ja) 1989-04-06 1989-04-06 光記録再生装置

Publications (2)

Publication Number Publication Date
DE69015675D1 true DE69015675D1 (de) 1995-02-16
DE69015675T2 DE69015675T2 (de) 1995-08-17

Family

ID=13867908

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69015675T Expired - Fee Related DE69015675T2 (de) 1989-04-06 1990-04-04 Gerät zur optischen Aufzeichnung und Wiedergabe.

Country Status (5)

Country Link
US (1) US5313441A (de)
EP (1) EP0391691B1 (de)
JP (1) JPH02265028A (de)
CA (1) CA2013836C (de)
DE (1) DE69015675T2 (de)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IL101570A0 (en) * 1992-04-10 1992-12-30 Amir Alon Method and apparatus for reading data
KR100269161B1 (ko) * 1993-02-27 2000-10-16 윤종용 광헤드
EP0621590B1 (de) * 1993-04-23 2000-03-29 Canon Kabushiki Kaisha Optisches Informationsaufzeichnungs- und/oder Wiedergabegerät
IL106009A0 (en) * 1993-06-14 1993-10-20 Amir Alon Method and apparatus for the simultaneous writing of data on an optical disk
IL107181A0 (en) * 1993-10-04 1994-01-25 Nogatech Ltd Optical disk reader
KR950015241A (ko) * 1993-11-16 1995-06-16 배순훈 광픽업의 포커스에러 검출방법 및 그 장치
US5612942A (en) * 1993-11-19 1997-03-18 Nec Corporation Optical head
JPH07311970A (ja) * 1994-05-17 1995-11-28 Seiko Epson Corp 光ヘッド及び光記憶装置
JPH0845102A (ja) * 1994-07-28 1996-02-16 Olympus Optical Co Ltd 光学ヘッド
JP3659089B2 (ja) * 1999-10-25 2005-06-15 株式会社日立製作所 光ヘッド及びそれを用いた光学的情報媒体記録再生装置
JP4412142B2 (ja) * 2003-12-19 2010-02-10 Ｔｄｋ株式会社 光ヘッド

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5483848A (en) * 1977-12-16 1979-07-04 Mitsubishi Electric Corp Automatic focusing device
NL8104588A (nl) * 1981-10-08 1983-05-02 Philips Nv Bundelscheidingsprisma, werkwijze voor het vervaardigen van dit prisma en van dit prisma voorziene optische lees- en/of schrijfeenheid.
JPS5971141A (ja) * 1982-10-14 1984-04-21 Mitsubishi Electric Corp 光学的信号読出し装置
NL8304212A (nl) * 1983-12-07 1984-10-01 Philips Nv Enkelvoudige collimatorlens met een asferisch oppervlak.
JPH069090B2 (ja) * 1984-06-12 1994-02-02 株式会社東芝 光学ヘツド
US4718052A (en) * 1984-10-01 1988-01-05 Mitsubishi Denki Kabushiki Kaisha Head assembly for optical disc
JPS6251047A (ja) * 1985-08-28 1987-03-05 Mitsubishi Electric Corp 光学式ヘツド装置
JPS6295743A (ja) * 1985-10-21 1987-05-02 Hitachi Ltd 光学的情報処理装置の自動焦点制御方式
EP0228620B1 (de) * 1985-12-10 1991-06-05 Nec Corporation Optischer Kopf mit einem Beugungsgitter zum Richten von zwei oder mehreren gebeugten Lichtstrahlen auf optische Detektoren
JPS6391819U (de) * 1986-12-05 1988-06-14
NL8700440A (nl) * 1987-02-23 1988-09-16 Philips Nv Optische inrichting bevattende een houder met daarin aangebracht een optisch stelsel.
JPS63269324A (ja) * 1987-04-28 1988-11-07 Mitsubishi Electric Corp 光デイスク駆動装置
US5060212A (en) * 1987-08-17 1991-10-22 Ricoh Company, Ltd. Integrated optical pick-up device
EP0339722B1 (de) * 1988-04-26 1993-10-06 Koninklijke Philips Electronics N.V. Anordnung zum optischen Abtasten eines magneto-optischen Aufzeichnungsträgers

Also Published As

Publication number Publication date
CA2013836A1 (en) 1990-10-06
EP0391691A2 (de) 1990-10-10
US5313441A (en) 1994-05-17
CA2013836C (en) 1994-07-26
EP0391691B1 (de) 1995-01-04
EP0391691A3 (de) 1991-01-09
JPH02265028A (ja) 1990-10-29
DE69015675T2 (de) 1995-08-17

Similar Documents

Publication Publication Date Title
DE69020624D1 (de) Signalwiedergabegerät für optische Aufzeichnungs- und Wiedergabeapparatur und Methode für dasselbe.
DE3677305D1 (de) Verfahren und geraet zur optischen aufnahme und wiedergabe.
DE69032775D1 (de) Optisches Informationsaufzeichnungsverfahren und Aufzeichnungsgerät
DE69015441D1 (de) Gerät zum Aufzeichnen und Wiedergeben.
DE69125046D1 (de) Gerät zur Informationsaufzeichnung und/oder -wiedergabe
DE3788752D1 (de) Gerät zur magnetischen Aufzeichnung und Wiedergabe.
DE69333964D1 (de) Vorrichtung zur Aufnahme und Wiedergabe
DE69028880D1 (de) Platten-Aufzeichnungs-/-Wiedergabegerät
DE3788634D1 (de) Verfahren und Gerät zur optischen Aufnahme.
DE3581883D1 (de) Vorrichtung zur signalaufzeichnung und/oder -wiedergabe.
DE68911722D1 (de) Gerät zur optischen Aufnahme und Wiedergabe von Information.
DE3876289D1 (de) Einrichtung zur magneto-optischen aufzeichnung und wiedergabe.
DE69015440D1 (de) Aufzeichnungs-/Wiedergabegerät.
DE69012945D1 (de) Optische aufzeichnungs- und/oder -wiedergabegerät.
DE69322601D1 (de) Gerät zur optischen Aufzeichnung und Wiedergabe von Informationen
DE69524008D1 (de) Vorrichtung zur optischen Aufzeichnung von Information
DE69320841D1 (de) Gerät zur Aufzeichnung und Wiedergabe von optischen Informationen
DE69029029D1 (de) Gerät zur magnetooptischen Aufzeichnung/Wiedergabe
DE3787071D1 (de) Geraet zur bandaufzeichnung und wiedergabe.
DE69019248D1 (de) Optisches Aufnahme- und/oder Wiedergabegerät.
DE69128067D1 (de) Gerät zur Aufzeichnung/Wiedergabe von optischen Informationen
DE69024416D1 (de) Optisches Aufzeichnungs- und Wiedergabegerät
DE69015675D1 (de) Gerät zur optischen Aufzeichnung und Wiedergabe.
DE69024739D1 (de) Optisches Aufnahme-/Wiedergabegerät
DE69018559D1 (de) Aufnahme-Wiedergabegerät.

Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8320 Willingness to grant licences declared (paragraph 23)
8339 Ceased/non-payment of the annual fee