FR2260163B1 - - Google Patents

Info

Publication number
FR2260163B1
FR2260163B1 FR7502598A FR7502598A FR2260163B1 FR 2260163 B1 FR2260163 B1 FR 2260163B1 FR 7502598 A FR7502598 A FR 7502598A FR 7502598 A FR7502598 A FR 7502598A FR 2260163 B1 FR2260163 B1 FR 2260163B1
Authority
FR
France
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
FR7502598A
Other languages
French (fr)
Other versions
FR2260163A1 (ja
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 FR2260163A1 publication Critical patent/FR2260163A1/fr
Application granted granted Critical
Publication of FR2260163B1 publication Critical patent/FR2260163B1/fr
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—Piezo-electric 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
FR7502598A 1974-02-04 1975-01-28 Expired FR2260163B1 (ja)

Applications Claiming Priority (1)

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

Publications (2)

Publication Number Publication Date
FR2260163A1 FR2260163A1 (ja) 1975-08-29
FR2260163B1 true FR2260163B1 (ja) 1979-08-03

Family

ID=23745720

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7502598A Expired FR2260163B1 (ja) 1974-02-04 1975-01-28

Country Status (4)

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

Families Citing this family (8)

* 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
JP4796551B2 (ja) * 2007-07-31 2011-10-19 太陽誘電株式会社 光情報再生システム

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

Also Published As

Publication number Publication date
DE2504599C2 (de) 1985-10-03
FR2260163A1 (ja) 1975-08-29
DE2504599A1 (de) 1975-08-21
IT1031407B (it) 1979-04-30
GB1503197A (en) 1978-03-08

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