FR2247041A1 - - Google Patents

Info

Publication number
FR2247041A1
FR2247041A1 FR7432684A FR7432684A FR2247041A1 FR 2247041 A1 FR2247041 A1 FR 2247041A1 FR 7432684 A FR7432684 A FR 7432684A FR 7432684 A FR7432684 A FR 7432684A FR 2247041 A1 FR2247041 A1 FR 2247041A1
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
FR7432684A
Other languages
French (fr)
Other versions
FR2247041B3 (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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of FR2247041A1 publication Critical patent/FR2247041A1/fr
Application granted granted Critical
Publication of FR2247041B3 publication Critical patent/FR2247041B3/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
    • 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
FR7432684A 1973-09-28 1974-09-27 Expired FR2247041B3 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7313362A NL7313362A (en) 1973-09-28 1973-09-28 DEVICE FOR READING A FLAT RECORD EDRAGER WITH MATION SAVED IN OPTICAL FORM.

Publications (2)

Publication Number Publication Date
FR2247041A1 true FR2247041A1 (en) 1975-05-02
FR2247041B3 FR2247041B3 (en) 1977-07-08

Family

ID=19819695

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7432684A Expired FR2247041B3 (en) 1973-09-28 1974-09-27

Country Status (4)

Country Link
DE (1) DE2445238A1 (en)
FR (1) FR2247041B3 (en)
GB (1) GB1482544A (en)
NL (1) NL7313362A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2455331A1 (en) * 1979-04-27 1980-11-21 Olympus Optical Co LENS CONTROL APPARATUS FOR CORRECTING POSITION ERRORS
EP0036224B1 (en) * 1980-03-19 1983-09-21 Koninklijke Philips Electronics N.V. Device for pivoting an optical element under electrodynamic control

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2455331A1 (en) * 1979-04-27 1980-11-21 Olympus Optical Co LENS CONTROL APPARATUS FOR CORRECTING POSITION ERRORS
EP0036224B1 (en) * 1980-03-19 1983-09-21 Koninklijke Philips Electronics N.V. Device for pivoting an optical element under electrodynamic control

Also Published As

Publication number Publication date
NL7313362A (en) 1975-04-02
GB1482544A (en) 1977-08-10
FR2247041B3 (en) 1977-07-08
DE2445238A1 (en) 1975-04-03

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Legal Events

Date Code Title Description
ST Notification of lapse