DE69019440T2 - Optischer Kopf mit einer Vorrichtung zur Ermittlung eines Spurfolgenfehlers. - Google Patents

Optischer Kopf mit einer Vorrichtung zur Ermittlung eines Spurfolgenfehlers.

Info

Publication number
DE69019440T2
DE69019440T2 DE69019440T DE69019440T DE69019440T2 DE 69019440 T2 DE69019440 T2 DE 69019440T2 DE 69019440 T DE69019440 T DE 69019440T DE 69019440 T DE69019440 T DE 69019440T DE 69019440 T2 DE69019440 T2 DE 69019440T2
Authority
DE
Germany
Prior art keywords
determining
optical head
tracking error
tracking
error
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
DE69019440T
Other languages
English (en)
Other versions
DE69019440D1 (de
Inventor
Tohru Nakamura
Hideki Aikoh
Masayuki Shinoda
Noboru Kikuchi
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Application granted granted Critical
Publication of DE69019440D1 publication Critical patent/DE69019440D1/de
Publication of DE69019440T2 publication Critical patent/DE69019440T2/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
    • G11B7/08—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
    • 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
    • G11B7/13—Optical detectors therefor
    • G11B7/133—Shape of individual detector elements
    • 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
    • G11B7/094—Methods and circuits for servo offset compensation

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Optical Head (AREA)
DE69019440T 1989-08-04 1990-07-31 Optischer Kopf mit einer Vorrichtung zur Ermittlung eines Spurfolgenfehlers. Expired - Fee Related DE69019440T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1203282A JPH0770073B2 (ja) 1989-08-04 1989-08-04 光学ヘッド

Publications (2)

Publication Number Publication Date
DE69019440D1 DE69019440D1 (de) 1995-06-22
DE69019440T2 true DE69019440T2 (de) 1995-10-05

Family

ID=16471469

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69019440T Expired - Fee Related DE69019440T2 (de) 1989-08-04 1990-07-31 Optischer Kopf mit einer Vorrichtung zur Ermittlung eines Spurfolgenfehlers.

Country Status (5)

Country Link
US (1) US5146445A (de)
EP (1) EP0416283B1 (de)
JP (1) JPH0770073B2 (de)
KR (1) KR930008144B1 (de)
DE (1) DE69019440T2 (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5351224A (en) * 1990-03-08 1994-09-27 Oki Electric Industry Co., Ltd. Adjustment of tracking servo and focusing servo in optical data recording/reproducing apparatus
US5278401A (en) * 1991-08-13 1994-01-11 Asahi Kogaku Kogyo Kabushiki Kaisha Optical disc apparatus having five light receiving areas for detecting focus error and tracking error
JP3145751B2 (ja) * 1991-12-03 2001-03-12 パイオニア株式会社 光ピックアップ装置
JP4036400B2 (ja) * 1998-03-20 2008-01-23 株式会社東芝 光ディスク装置
JP3422255B2 (ja) * 1998-06-10 2003-06-30 富士通株式会社 トラッキング装置、及び光ディスク装置

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7600843A (nl) * 1976-01-28 1977-08-01 Philips Nv Inrichting voor het uitlezen van een registratie- drager waarop informatie, bijvoorbeeld en/of ge- luidsinformatie, is aangebracht.
JPS55101142A (en) * 1979-01-29 1980-08-01 Teac Co Focus detection unit of optical reproducing device
JPS5647933A (en) * 1979-09-25 1981-04-30 Sony Corp Optical signal head
JPS57183639A (en) * 1981-05-08 1982-11-12 Hitachi Ltd Focus detector
JPS5856235A (ja) * 1981-09-28 1983-04-02 Hitachi Ltd 光学的トラツク追跡装置
JPS60214429A (ja) * 1984-04-11 1985-10-26 Hitachi Ltd トラツキング誤差検出装置
JPS60263344A (ja) * 1984-06-11 1985-12-26 Yokogawa Hokushin Electric Corp 光メモリ装置
JPH0626972Y2 (ja) * 1986-10-03 1994-07-20 パイオニア株式会社 光学式ピツクアツプ装置
JPS63175233A (ja) * 1987-01-14 1988-07-19 Canon Inc トラツキング誤差検出装置
EP0317224B1 (de) * 1987-11-17 1993-08-04 Matsushita Electric Industrial Co., Ltd. Fokusregelsystem für optische Scheibenvorrichtung mit lichtempfindlichen Elementen in der Fokusebene des Bildes der Informationsstruktur
JPH0648575Y2 (ja) * 1988-09-13 1994-12-12 パイオニア株式会社 光検出器

Also Published As

Publication number Publication date
DE69019440D1 (de) 1995-06-22
KR910005249A (ko) 1991-03-30
EP0416283A2 (de) 1991-03-13
EP0416283A3 (en) 1992-01-02
US5146445A (en) 1992-09-08
JPH0770073B2 (ja) 1995-07-31
EP0416283B1 (de) 1995-05-17
JPH0366033A (ja) 1991-03-20
KR930008144B1 (ko) 1993-08-26

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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