DE69021889T2 - Spursteuersystem für eine optische aufnahme- und abtasteinheit. - Google Patents

Spursteuersystem für eine optische aufnahme- und abtasteinheit.

Info

Publication number
DE69021889T2
DE69021889T2 DE69021889T DE69021889T DE69021889T2 DE 69021889 T2 DE69021889 T2 DE 69021889T2 DE 69021889 T DE69021889 T DE 69021889T DE 69021889 T DE69021889 T DE 69021889T DE 69021889 T2 DE69021889 T2 DE 69021889T2
Authority
DE
Germany
Prior art keywords
tracking
recording medium
projected
optical recording
light spot
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
DE69021889T
Other languages
English (en)
Other versions
DE69021889D1 (de
Inventor
Yasuaki Morimoto
Seiji Dr Yonezawa
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.)
Deutsche Thomson Brandt GmbH
Hitachi Ltd
Original Assignee
Deutsche Thomson Brandt GmbH
Hitachi 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
Priority claimed from JP31332789A external-priority patent/JP2771287B2/ja
Priority claimed from JP31332689A external-priority patent/JP2771286B2/ja
Application filed by Deutsche Thomson Brandt GmbH, Hitachi Ltd filed Critical Deutsche Thomson Brandt GmbH
Application granted granted Critical
Publication of DE69021889D1 publication Critical patent/DE69021889D1/de
Publication of DE69021889T2 publication Critical patent/DE69021889T2/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
    • 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
    • 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
    • G11B7/0901—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
    • G11B7/0904—Dithered tracking systems

Landscapes

  • Optical Recording Or Reproduction (AREA)
  • Optical Communication System (AREA)
DE69021889T 1989-12-04 1990-12-04 Spursteuersystem für eine optische aufnahme- und abtasteinheit. Expired - Fee Related DE69021889T2 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP31332789A JP2771287B2 (ja) 1989-12-04 1989-12-04 トラッキング方法および光ディスク装置
JP31332689A JP2771286B2 (ja) 1989-12-04 1989-12-04 光学的記録装置
PCT/EP1990/002099 WO1991008568A1 (en) 1989-12-04 1990-12-04 A tracking system in an optical recording/reproducing device

Publications (2)

Publication Number Publication Date
DE69021889D1 DE69021889D1 (de) 1995-09-28
DE69021889T2 true DE69021889T2 (de) 1996-05-02

Family

ID=26567518

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69021889T Expired - Fee Related DE69021889T2 (de) 1989-12-04 1990-12-04 Spursteuersystem für eine optische aufnahme- und abtasteinheit.

Country Status (7)

Country Link
EP (1) EP0504300B1 (de)
AT (1) ATE126919T1 (de)
AU (1) AU7054091A (de)
DE (1) DE69021889T2 (de)
ES (1) ES2080938T3 (de)
HK (1) HK1000334A1 (de)
WO (1) WO1991008568A1 (de)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05128594A (ja) * 1991-10-31 1993-05-25 Sony Corp 変位量測定方法
DE4323067A1 (de) * 1993-07-10 1995-01-12 Thomson Brandt Gmbh G-Faktor-Abgleich
JPH09147381A (ja) * 1995-11-22 1997-06-06 Pioneer Electron Corp 情報読み取り装置
JP3772379B2 (ja) * 1996-03-25 2006-05-10 ソニー株式会社 記録媒体、アドレス記録方法、および装置
KR100414792B1 (ko) * 1996-09-30 2004-04-03 주식회사 대우일렉트로닉스 광 디스크 플레이어의 트래킹 밸런스 제어 방법
JPH11238236A (ja) * 1998-02-20 1999-08-31 Fujitsu Ltd 光学記憶装置

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2158611A (en) * 1984-05-07 1985-11-13 Rca Corp Servo error reduction apparatus for disc record playback system
US4748609A (en) * 1985-03-29 1988-05-31 Hitachi, Ltd. Method and apparatus for composite tracking servo system with track offset correction and rotary optical disc having at least one correction mark for correcting track offset
US4866688A (en) * 1985-12-20 1989-09-12 Hitachi, Ltd. Composite tracking servo system for optical disc apparatus with track offset correction
JPS62190927U (de) * 1986-05-23 1987-12-04
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

Also Published As

Publication number Publication date
AU7054091A (en) 1991-06-26
EP0504300B1 (de) 1995-08-23
ATE126919T1 (de) 1995-09-15
EP0504300A1 (de) 1992-09-23
HK1000334A1 (en) 1998-02-27
WO1991008568A1 (en) 1991-06-13
ES2080938T3 (es) 1996-02-16
DE69021889D1 (de) 1995-09-28

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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