DK535086D0 - Fremgangsmaade og kredslaebsanordning til fokusering af en lysstraale paa en optisk optegningsbaerer - Google Patents

Fremgangsmaade og kredslaebsanordning til fokusering af en lysstraale paa en optisk optegningsbaerer

Info

Publication number
DK535086D0
DK535086D0 DK535086A DK535086A DK535086D0 DK 535086 D0 DK535086 D0 DK 535086D0 DK 535086 A DK535086 A DK 535086A DK 535086 A DK535086 A DK 535086A DK 535086 D0 DK535086 D0 DK 535086D0
Authority
DK
Denmark
Prior art keywords
focusing
procedure
light beam
optical recorder
circular device
Prior art date
Application number
DK535086A
Other languages
English (en)
Other versions
DK535086A (da
Inventor
Dieter Baas
Arthur Kurz
Friedrich Fueldner
Original Assignee
Thomson Brandt Gmbh
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 Thomson Brandt Gmbh filed Critical Thomson Brandt Gmbh
Publication of DK535086D0 publication Critical patent/DK535086D0/da
Publication of DK535086A publication Critical patent/DK535086A/da

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
    • G11B7/085—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam into, or out of, its operative position or across tracks, otherwise than during the transducing operation, e.g. for adjustment or preliminary positioning or track change or selection
    • 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
    • G11B7/0945—Methods for initialising servos, start-up sequences
    • 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
    • G11B7/085—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam into, or out of, its operative position or across tracks, otherwise than during the transducing operation, e.g. for adjustment or preliminary positioning or track change or selection
    • G11B7/08505—Methods for track change, selection or preliminary positioning by moving the head
    • G11B7/08511—Methods for track change, selection or preliminary positioning by moving the head with focus pull-in 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

Landscapes

  • Optical Recording Or Reproduction (AREA)
  • Optical Head (AREA)
  • Automatic Focus Adjustment (AREA)
  • Manufacturing Optical Record Carriers (AREA)
DK535086A 1985-03-09 1986-11-07 Fremgangsmaade og kredsloebsanordning til fokusering af en lysstraale paa en optisk optegningsbaerer DK535086A (da)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19853508525 DE3508525A1 (de) 1985-03-09 1985-03-09 Fokus-such-einrichtung fuer beruehrungslose abtastung
PCT/DE1986/000065 WO1986005306A1 (en) 1985-03-09 1986-02-21 Process and circuit arrangement for focussing a light beam onto an optical recording medium

Publications (2)

Publication Number Publication Date
DK535086D0 true DK535086D0 (da) 1986-11-07
DK535086A DK535086A (da) 1986-11-07

Family

ID=6264774

Family Applications (1)

Application Number Title Priority Date Filing Date
DK535086A DK535086A (da) 1985-03-09 1986-11-07 Fremgangsmaade og kredsloebsanordning til fokusering af en lysstraale paa en optisk optegningsbaerer

Country Status (8)

Country Link
EP (2) EP0214194B1 (da)
JP (1) JPS62501998A (da)
KR (1) KR920000426B1 (da)
AT (2) ATE70652T1 (da)
DE (3) DE3508525A1 (da)
DK (1) DK535086A (da)
HK (1) HK13096A (da)
WO (1) WO1986005306A1 (da)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0291827A (ja) * 1988-09-28 1990-03-30 Toshiba Corp 光学式ディスク再生装置のサーボ系オフセット調整回路
EP0618569B1 (en) * 1993-04-02 1999-06-02 Sony Corporation Focusing servo system and focus servo acquisition enable method

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2330062A1 (fr) * 1975-10-31 1977-05-27 Thomson Brandt Dispositif de recherche de focalisation et lecteur optique comportant un tel dispositif
SE7813460L (sv) * 1978-03-27 1979-09-28 Mca Disco Vision Videoskivspelare
JPS5593541A (en) * 1979-01-10 1980-07-16 Pioneer Video Corp Polarization mirror driving unit in optical information reader
JPS55118338A (en) * 1979-03-08 1980-09-11 Taiyo Mfg Horizontal type mefun removing machine
JPS56148747A (en) * 1980-04-18 1981-11-18 Mitsubishi Electric Corp Focus controller
JPS56159844A (en) * 1980-05-09 1981-12-09 Mitsubishi Electric Corp Focus control device
JPS5877035A (ja) * 1981-10-08 1983-05-10 Mitsubishi Electric Corp 自動焦点引込み装置
JPS58121137A (ja) * 1982-01-09 1983-07-19 Sony Corp 光学式デイスク再生装置のフオ−カス引込み回路
JPS58128031A (ja) * 1982-01-24 1983-07-30 Sony Corp デイスク再生装置
JPS592235A (ja) * 1982-06-28 1984-01-07 Pioneer Electronic Corp 光学式情報読取装置におけるサ−ボ装置
JPS598144A (ja) * 1982-07-05 1984-01-17 Trio Kenwood Corp 光学的情報読取装置
JPS5942649A (ja) * 1982-09-02 1984-03-09 Mitsubishi Electric Corp 光学的サ−ボ装置
JPS59188845A (ja) * 1983-04-08 1984-10-26 Onkyo Corp 光ピツクアツプ
US4607157A (en) * 1984-02-09 1986-08-19 Xerox Corporation Automatic focus offset correction system

Also Published As

Publication number Publication date
DE3650167D1 (de) 1995-01-19
WO1986005306A1 (en) 1986-09-12
EP0432658A3 (en) 1991-09-04
KR920000426B1 (ko) 1992-01-13
DE3508525A1 (de) 1986-09-11
JPH0576100B2 (da) 1993-10-21
EP0432658A2 (de) 1991-06-19
KR880700400A (ko) 1988-03-15
JPS62501998A (ja) 1987-08-06
EP0432658B1 (de) 1994-12-07
ATE115318T1 (de) 1994-12-15
HK13096A (en) 1996-02-02
DE3682980D1 (de) 1992-01-30
DK535086A (da) 1986-11-07
EP0214194B1 (de) 1991-12-18
EP0214194A1 (de) 1987-03-18
ATE70652T1 (de) 1992-01-15

Similar Documents

Publication Publication Date Title
KR870010506A (ko) 광 자기 기록 장치
DE3879092D1 (de) Fokussierungsverfahren fuer eine optische abtastvorrichtung.
KR880011750A (ko) 광 디스크시스템의 트랙 신호 조정 장치
JPS6437729A (en) Optical information recording and reproducing device
DK535086D0 (da) Fremgangsmaade og kredslaebsanordning til fokusering af en lysstraale paa en optisk optegningsbaerer
GB2126379B (en) Device for controlling the movement of a focal point of a light beam used for detecting recorded information
KR880011748A (ko) 광학 디스크 기록 재생 장치
BR9605836B1 (pt) aparelho e processo para controlar um ponto focal de um feixe de luz focalizado que é direcionado sobre um plano focal localizado dentro de um meio ótico tendo uma primeira e segunda camadas de informação.
JPS53132308A (en) Focus controller of optical reproducer
JPS57205834A (en) Light focusing position controller
JPS53147507A (en) Focus position controller
JPS53129604A (en) Optical recorder-reproducer
JPS56148747A (en) Focus controller
JPS57105711A (en) Lens motor driving circuit of auto focus camera
JPS56156938A (en) Focus control device of laser beam
CA2085756A1 (en) Optical disk apparatus
PT86833A (pt) Dispositivos para instalacoes com emissor de infravermalhos
JPS5517818A (en) Procedure of focus initialization setting in optical recording unit and its equipment
KR860009395A (ko) 광학 판독 레코드 캐리어상의 광빔 주사용장치
JPS56110915A (en) Optical information recorder
KR840007462A (ko) 광도체의 수광단을 렌즈의 초점에 맞추기 위한 방법 및 장치
JPS5730126A (en) Optical reproducing device
JPS5769537A (en) Focus adjusting device
KR930014345A (ko) 광 디스크장치의 트랙점프 제어방법 및 그 시스템
JPS55129940A (en) Optical type reproducing device

Legal Events

Date Code Title Description
AHS Application shelved for other reasons than non-payment