GB2149938B - Device and method for controlling movement of focusing lens for optical disk reading apparatus - Google Patents

Device and method for controlling movement of focusing lens for optical disk reading apparatus

Info

Publication number
GB2149938B
GB2149938B GB08427350A GB8427350A GB2149938B GB 2149938 B GB2149938 B GB 2149938B GB 08427350 A GB08427350 A GB 08427350A GB 8427350 A GB8427350 A GB 8427350A GB 2149938 B GB2149938 B GB 2149938B
Authority
GB
United Kingdom
Prior art keywords
optical disk
reading apparatus
focusing lens
controlling movement
disk reading
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
Application number
GB08427350A
Other languages
English (en)
Other versions
GB2149938A (en
GB8427350D0 (en
Inventor
Yoshikiyo Konno
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.)
Pioneer Corp
Original Assignee
Pioneer Electronic 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 Pioneer Electronic Corp filed Critical Pioneer Electronic Corp
Publication of GB8427350D0 publication Critical patent/GB8427350D0/en
Publication of GB2149938A publication Critical patent/GB2149938A/en
Application granted granted Critical
Publication of GB2149938B publication Critical patent/GB2149938B/en
Expired 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
    • G11B7/0945—Methods for initialising servos, start-up sequences
GB08427350A 1983-11-01 1984-10-30 Device and method for controlling movement of focusing lens for optical disk reading apparatus Expired GB2149938B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1983169558U JPS6077023U (ja) 1983-11-01 1983-11-01 記録情報読取装置のフオ−カスレンズ移動制御装置

Publications (3)

Publication Number Publication Date
GB8427350D0 GB8427350D0 (en) 1984-12-05
GB2149938A GB2149938A (en) 1985-06-19
GB2149938B true GB2149938B (en) 1987-10-07

Family

ID=15888686

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08427350A Expired GB2149938B (en) 1983-11-01 1984-10-30 Device and method for controlling movement of focusing lens for optical disk reading apparatus

Country Status (4)

Country Link
US (1) US4703466A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
JP (1) JPS6077023U (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (1) DE3439904A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1) GB2149938B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6222244A (ja) * 1985-07-19 1987-01-30 Nippon Gakki Seizo Kk 光学式再生装置のフオ−カスサ−チ回路
USRE34769E (en) * 1986-01-16 1994-11-01 Mitsubishi Denki Kabushiki Kaisha Current mirror amplifier for use in an optical data medium driving apparatus and servo-circuit
US5004901A (en) * 1987-06-04 1991-04-02 Mitsubishi Denki Kabushiki Kaisha Current mirror amplifier for use in an optical data medium driving apparatus and servo-circuit
US4998233A (en) * 1988-02-12 1991-03-05 International Business Machines Corporation Acquiring focus in optical systems using a focus error signal and a laser drive signal
US5101392A (en) * 1988-11-21 1992-03-31 Kabushiki Kaisha Toshiba Information recording apparatus
US5128913A (en) * 1990-06-04 1992-07-07 International Business Machines Corporation Acquiring focus in an optical system using a soft focus acquiring system
US5189293A (en) * 1991-06-27 1993-02-23 U.S. Philips Corporation Optical scanning apparatus including beam focal point position control when out of focus range
JP2770640B2 (ja) * 1991-10-02 1998-07-02 松下電器産業株式会社 対物レンズ駆動装置
US5367513A (en) * 1993-11-05 1994-11-22 International Business Machines Corporation Focus and tracking servo decoupling system
JPH08203108A (ja) * 1995-01-30 1996-08-09 Toshiba Corp 光ディスク再生装置
JP2001297454A (ja) 2000-04-14 2001-10-26 Matsushita Electric Ind Co Ltd 光ディスク装置

Family Cites Families (4)

* 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
JPS5870434A (ja) * 1981-10-22 1983-04-26 Toshiba Corp 光学ヘツド
JPS58155527A (ja) * 1982-03-10 1983-09-16 Hitachi Ltd 光デイスクプレ−ヤのフオ−カス引き込み回路

Also Published As

Publication number Publication date
US4703466A (en) 1987-10-27
DE3439904C2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1987-12-23
JPS6077023U (ja) 1985-05-29
DE3439904A1 (de) 1985-05-23
GB2149938A (en) 1985-06-19
GB8427350D0 (en) 1984-12-05

Similar Documents

Publication Publication Date Title
DE3469814D1 (en) Apparatus for driving objective lens of optical disc player
GB2133914B (en) Optical recording and/or reproducing apparatus
EP0106673A3 (en) Optical and reversible recording and reproducing apparatus
DE3277657D1 (en) Method and apparatus for optically recording and reproducing information
KR0131434B1 (en) Optical disk apparatus & recording an readinng method for an
DE3368140D1 (en) Method of and optical device for focusing a light beam onto a reference plane of an information carrier
DE3478826D1 (en) Optical system drive for optical recording/reproducing apparatus
DE3373734D1 (en) High-sensitive optical reading apparatus and method of reading optical information
AU2325184A (en) Apparatus for optical recording and/or reading
EP0265849A3 (en) Optical recording/reproducing method and apparatus
GB2104687B (en) Optical information recording and reproducing apparatus
EP0459420A3 (en) Tracking control method and apparatus for an optical disc system
EP0051460B2 (en) Method of and apparatus for reading out radiation image information
EP0485043A3 (en) Method and apparatus for determining the optical quality of a transparent disk
EP0526017A3 (en) Apparatus for and method of reproducing information from recordable optical disc
DE3378386D1 (en) Optical disk and method of recording and reproduction for the disk
DE3368793D1 (en) Tracking servo circuit for optical disc reproducing device
DE3472322D1 (en) Optical information recording and reproducing apparatus
GB2110499B (en) Method and apparatus for detecting focussing error signal of objective lens
EP0229395A3 (en) Optical magnetic recording and reproducing method and apparatus
KR930001059B1 (en) Method and apparatus for controlling beam track position of optical storage device
GB2149938B (en) Device and method for controlling movement of focusing lens for optical disk reading apparatus
EP0289309A3 (en) An apparatus for reading an optical disk
EP0264920A3 (en) Tracking method and apparatus for optical recording medium
GB9004306D0 (en) Optical lens system of optical information recording/reproducing apparatus

Legal Events

Date Code Title Description
746 Register noted 'licences of right' (sect. 46/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19951030