GB1503197A - Optical image reproducing system and tracking method - Google Patents

Optical image reproducing system and tracking method

Info

Publication number
GB1503197A
GB1503197A GB461175A GB461175A GB1503197A GB 1503197 A GB1503197 A GB 1503197A GB 461175 A GB461175 A GB 461175A GB 461175 A GB461175 A GB 461175A GB 1503197 A GB1503197 A GB 1503197A
Authority
GB
United Kingdom
Prior art keywords
optical image
tracking method
reproducing system
image reproducing
tracking
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
GB461175A
Other languages
English (en)
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.)
Thomson-Brandt SA
Original Assignee
Thomson-Brandt SA
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 SA filed Critical Thomson-Brandt SA
Publication of GB1503197A publication Critical patent/GB1503197A/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
    • G11B7/0925—Electromechanical actuators for lens positioning
    • G11B7/0937—Piezoelectric actuators
    • 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
    • G11B7/095—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 specially adapted for discs, e.g. for compensation of eccentricity or wobble
    • G11B7/0953—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 specially adapted for discs, e.g. for compensation of eccentricity or wobble to compensate for eccentricity of the disc or disc tracks
GB461175A 1974-02-04 1975-02-03 Optical image reproducing system and tracking method Expired GB1503197A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US43968374A 1974-02-04 1974-02-04

Publications (1)

Publication Number Publication Date
GB1503197A true GB1503197A (en) 1978-03-08

Family

ID=23745720

Family Applications (1)

Application Number Title Priority Date Filing Date
GB461175A Expired GB1503197A (en) 1974-02-04 1975-02-03 Optical image reproducing system and tracking method

Country Status (4)

Country Link
DE (1) DE2504599C2 (ja)
FR (1) FR2260163B1 (ja)
GB (1) GB1503197A (ja)
IT (1) IT1031407B (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2026345A1 (en) * 2007-07-31 2009-02-18 Taiyo Yuden Co., Ltd. Optical-information reproducing system

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2326006A1 (fr) * 1975-09-26 1977-04-22 Thomson Brandt Procede de commande de la mise en route et de l'arret de la lecture d'un support d'enregistrement, support d'enregistrement et appareil pour la mise en oeuvre de ce procede
NL174609C (nl) * 1975-10-15 1984-07-02 Philips Nv Volgspiegelinrichting in een optische platenspeler.
FR2375690A1 (fr) * 1976-12-23 1978-07-21 Thomson Brandt Dispositif de detection de l'erreur de suivi radial pour lecteurs et enregistreurs optiques
CA1147456A (en) * 1978-03-23 1983-05-31 Raymond F. Ravizza Automatically compensated movable head servo circuit and method
JPS583297B2 (ja) * 1978-06-09 1983-01-20 株式会社日立製作所 情報記録再生方法，その装置およびその記録媒体
FR2509077A1 (fr) * 1981-07-03 1983-01-07 Thomson Csf Dispositif resonnant a lame vibrante excitee par un transducteur piezoelectrique et son application au suivi radial d'une piste d'un support d'information optique
FR2511537B1 (fr) * 1981-08-14 1986-09-05 Thomson Csf Dispositif optique de suivi de piste a echantillonnage

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3126535A (en) * 1961-12-27 1964-03-24 Transducer positioning system
US3371154A (en) * 1963-12-26 1968-02-27 Minnesota Mining & Mfg Audio-video disk recording system with crosstalk prevention
DE1613990A1 (de) * 1968-03-01 1970-08-20 Bosch Gmbh Robert Einrichtung zur Spurfuehrung bei einem Lichtfleck-Abtastgeraet
US3661441A (en) * 1969-11-21 1972-05-09 Nippon Telegraph & Telephone Arrangement for acousto-optical light deflection

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2026345A1 (en) * 2007-07-31 2009-02-18 Taiyo Yuden Co., Ltd. Optical-information reproducing system

Also Published As

Publication number Publication date
DE2504599C2 (de) 1985-10-03
DE2504599A1 (de) 1975-08-21
IT1031407B (it) 1979-04-30
FR2260163A1 (ja) 1975-08-29
FR2260163B1 (ja) 1979-08-03

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Legal Events

Date Code Title Description
PS Patent sealed
746 Register noted 'licences of right' (sect. 46/1977)
PE20 Patent expired after termination of 20 years

Effective date: 19950202