JPS6223372B2 - - Google Patents

Info

Publication number
JPS6223372B2
JPS6223372B2 JP56005271A JP527181A JPS6223372B2 JP S6223372 B2 JPS6223372 B2 JP S6223372B2 JP 56005271 A JP56005271 A JP 56005271A JP 527181 A JP527181 A JP 527181A JP S6223372 B2 JPS6223372 B2 JP S6223372B2
Authority
JP
Japan
Prior art keywords
signal
control loop
gain
frequency
information
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
JP56005271A
Other languages
English (en)
Japanese (ja)
Other versions
JPS57120238A (en
Inventor
Shinichi Tanaka
Tsuneo Hirose
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
Priority to JP56005271A priority Critical patent/JPS57120238A/ja
Priority to US06/339,509 priority patent/US4488276A/en
Priority to DE8282300203T priority patent/DE3260743D1/de
Priority to EP82300203A priority patent/EP0056712B1/en
Publication of JPS57120238A publication Critical patent/JPS57120238A/ja
Publication of JPS6223372B2 publication Critical patent/JPS6223372B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B21/00—Head arrangements not specific to the method of recording or reproducing
    • G11B21/02—Driving or moving of heads
    • G11B21/10—Track finding or aligning by moving the head ; Provisions for maintaining alignment of the head relative to the track during transducing operation, i.e. 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
    • G11B7/0904—Dithered tracking systems

Landscapes

  • Optical Recording Or Reproduction (AREA)
  • Automatic Focus Adjustment (AREA)
  • Moving Of The Head To Find And Align With The Track (AREA)
JP56005271A 1981-01-16 1981-01-16 Reproducing device Granted JPS57120238A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP56005271A JPS57120238A (en) 1981-01-16 1981-01-16 Reproducing device
US06/339,509 US4488276A (en) 1981-01-16 1982-01-15 Information read apparatus with tracking control system
DE8282300203T DE3260743D1 (en) 1981-01-16 1982-01-15 Information read apparatus with tracking control system
EP82300203A EP0056712B1 (en) 1981-01-16 1982-01-15 Information read apparatus with tracking control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56005271A JPS57120238A (en) 1981-01-16 1981-01-16 Reproducing device

Publications (2)

Publication Number Publication Date
JPS57120238A JPS57120238A (en) 1982-07-27
JPS6223372B2 true JPS6223372B2 (en, 2012) 1987-05-22

Family

ID=11606562

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56005271A Granted JPS57120238A (en) 1981-01-16 1981-01-16 Reproducing device

Country Status (4)

Country Link
US (1) US4488276A (en, 2012)
EP (1) EP0056712B1 (en, 2012)
JP (1) JPS57120238A (en, 2012)
DE (1) DE3260743D1 (en, 2012)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4543621A (en) * 1982-06-10 1985-09-24 Datacopy Corporation Spiral track disk drive
US4642541A (en) * 1983-10-20 1987-02-10 Memorex Corporation Track following servo for higher density disk files
DE3485675D1 (de) * 1983-11-09 1992-05-27 Sharp Kk Servosystem zum positionieren eines optischen strahls.
EP0274567B1 (en) * 1983-11-09 1992-04-22 Sharp Kabushiki Kaisha Servo-system for positioning an optical beam
JPH0750415B2 (ja) * 1984-10-08 1995-05-31 オリンパス光学工業株式会社 光学式記録再生装置のサーボループ回路
DE3500671A1 (de) * 1985-01-11 1986-07-17 Deutsche Thomson-Brandt Gmbh, 7730 Villingen-Schwenningen Lesevorrichtung zum optischen abtasten von auf einem beweglichen plattenfoermigen traeger aufgezeichneten informationen
US4745588A (en) * 1985-04-16 1988-05-17 Olympus Optical Co., Ltd. Tracking control apparatus
US4768180A (en) * 1986-03-17 1988-08-30 Laser Magnetic Storage International Company Multistage tracking system
JP2681933B2 (ja) * 1987-07-24 1997-11-26 松下電器産業株式会社 記録再生装置
DE3732903A1 (de) * 1987-09-30 1989-04-13 Thomson Brandt Gmbh Optische abtastvorrichtung
JP2911449B2 (ja) * 1987-10-29 1999-06-23 パイオニア株式会社 光学式情報読取装置
JPH03100931A (ja) * 1989-09-14 1991-04-25 Mitsubishi Electric Corp 光学式情報記録再生装置
JP3336778B2 (ja) * 1994-11-25 2002-10-21 松下電器産業株式会社 トラッキング誤差検出装置

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3725764A (en) * 1971-04-01 1973-04-03 Ibm Servo positioning system for magnetic disk memory including radial runout servo compensation
US3808486A (en) * 1972-08-25 1974-04-30 Information Storage Systems Selective frequency compensation for a servo system
US3932700A (en) * 1974-02-04 1976-01-13 Zenith Radio Corporation Focus tracking registration for optical reproducing systems
US3985952A (en) * 1974-02-04 1976-10-12 Zenith Radio Corporation Elasto-optic device for spot wobble in a video disc player
AR205839A1 (es) * 1974-09-30 1976-06-07 Mca Disco Vision Servodisposicion para recorrer opticamente y leer simultaneamente un canal de informacion almacenado en un disco de video
US3947881A (en) * 1975-04-21 1976-03-30 Control Data Corporation Servo positioning error control for magnetic disk file
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.
JPS52120805A (en) * 1976-04-02 1977-10-11 Sony Corp Servo apparatus
US4180839A (en) * 1977-04-05 1979-12-25 Bell & Howell Company Information reproducing apparatus
JPS54102107A (en) * 1978-01-30 1979-08-11 Hitachi Ltd Control information detecting method
JPS6048809B2 (ja) * 1979-10-16 1985-10-29 パイオニアビデオ株式会社 情報読取装置におけるトラッキングサ−ボ引込装置

Also Published As

Publication number Publication date
JPS57120238A (en) 1982-07-27
EP0056712B1 (en) 1984-09-19
EP0056712A3 (en) 1982-08-11
EP0056712A2 (en) 1982-07-28
US4488276A (en) 1984-12-11
DE3260743D1 (en) 1984-10-25

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