FR2260163A1 - - Google Patents

Info

Publication number
FR2260163A1
FR2260163A1 FR7502598A FR7502598A FR2260163A1 FR 2260163 A1 FR2260163 A1 FR 2260163A1 FR 7502598 A FR7502598 A FR 7502598A FR 7502598 A FR7502598 A FR 7502598A FR 2260163 A1 FR2260163 A1 FR 2260163A1
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.)
Granted
Application number
FR7502598A
Other languages
French (fr)
Other versions
FR2260163B1 (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 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 (en)

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 true FR2260163A1 (en) 1975-08-29
FR2260163B1 FR2260163B1 (en) 1979-08-03

Family

ID=23745720

Family Applications (1)

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

Country Status (4)

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

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2420816A1 (en) * 1978-03-23 1979-10-19 Ampex MOBILE TRANSDUCER HEAD SLAVE WITH AUTOMATIC COMPENSATION
FR2428361A1 (en) * 1978-06-09 1980-01-04 Hitachi Ltd METHOD AND DEVICE FOR RECORDING AND REPRODUCING INFORMATION
FR2509077A1 (en) * 1981-07-03 1983-01-07 Thomson Csf Vibrating mirror for tracking on optically recorded disc - includes metallic body with flexible blade which oscillates in flexing mode
FR2511537A1 (en) * 1981-08-14 1983-02-18 Thomson Csf OPTICAL TRACKING DEVICE FOR SAMPLING TRACK

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2326006A1 (en) * 1975-09-26 1977-04-22 Thomson Brandt PROCEDURE FOR CONTROLLING THE START-UP AND STOPPING OF THE READING OF A RECORDING MEDIA, RECORDING MEDIA AND APPARATUS FOR IMPLEMENTING THIS PROCESS
NL174609C (en) * 1975-10-15 1984-07-02 Philips Nv TRACK MIRROR IN AN OPTICAL RECORD PLAYER.
FR2375690A1 (en) * 1976-12-23 1978-07-21 Thomson Brandt RADIAL TRACKING ERROR DETECTION DEVICE FOR OPTICAL READERS AND RECORDERS
JP4796551B2 (en) * 2007-07-31 2011-10-19 太陽誘電株式会社 Optical information reproduction system

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 (en) * 1968-03-01 1970-08-20 Bosch Gmbh Robert Device for tracking in a light spot scanning device
US3661441A (en) * 1969-11-21 1972-05-09 Nippon Telegraph & Telephone Arrangement for acousto-optical light deflection

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2420816A1 (en) * 1978-03-23 1979-10-19 Ampex MOBILE TRANSDUCER HEAD SLAVE WITH AUTOMATIC COMPENSATION
FR2428361A1 (en) * 1978-06-09 1980-01-04 Hitachi Ltd METHOD AND DEVICE FOR RECORDING AND REPRODUCING INFORMATION
FR2509077A1 (en) * 1981-07-03 1983-01-07 Thomson Csf Vibrating mirror for tracking on optically recorded disc - includes metallic body with flexible blade which oscillates in flexing mode
FR2511537A1 (en) * 1981-08-14 1983-02-18 Thomson Csf OPTICAL TRACKING DEVICE FOR SAMPLING TRACK
US4535431A (en) * 1981-08-14 1985-08-13 Thomson-Csf Optical track follower device with sampling

Also Published As

Publication number Publication date
DE2504599C2 (en) 1985-10-03
DE2504599A1 (en) 1975-08-21
FR2260163B1 (en) 1979-08-03
IT1031407B (en) 1979-04-30
GB1503197A (en) 1978-03-08

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