CA1071330A - Optical focussing read-out device - Google Patents

Optical focussing read-out device

Info

Publication number
CA1071330A
CA1071330A CA251,476A CA251476A CA1071330A CA 1071330 A CA1071330 A CA 1071330A CA 251476 A CA251476 A CA 251476A CA 1071330 A CA1071330 A CA 1071330A
Authority
CA
Canada
Prior art keywords
optical
read
displacement
out device
data carrier
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
CA251,476A
Other languages
English (en)
French (fr)
Inventor
Claude Bricot
Claude Puech
Jean-Pierre Lacotte
Francois Le Carvennec
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
Application granted granted Critical
Publication of CA1071330A publication Critical patent/CA1071330A/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
    • G11B7/0908—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 focusing only

Landscapes

  • Optical Recording Or Reproduction (AREA)
  • Automatic Focus Adjustment (AREA)
CA251,476A 1975-04-30 1976-04-29 Optical focussing read-out device Expired CA1071330A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7513620A FR2309888A1 (fr) 1975-04-30 1975-04-30 Dispositif optique de projection et lecteur optique comportant un tel dispositif

Publications (1)

Publication Number Publication Date
CA1071330A true CA1071330A (en) 1980-02-05

Family

ID=9154695

Family Applications (1)

Application Number Title Priority Date Filing Date
CA251,476A Expired CA1071330A (en) 1975-04-30 1976-04-29 Optical focussing read-out device

Country Status (5)

Country Link
JP (1) JPS5931776B2 (https=)
CA (1) CA1071330A (https=)
DE (1) DE2619232A1 (https=)
FR (1) FR2309888A1 (https=)
GB (1) GB1541596A (https=)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4302830A (en) * 1978-05-10 1981-11-24 Olympus Optical Company Ltd. Optical information reading-out apparatus
NL8003729A (nl) * 1980-06-27 1982-01-18 Philips Nv Inrichting voor optische scherpstelling.
NL8004969A (nl) * 1980-09-02 1982-04-01 Philips Nv Inrichting voor optische scherpstelling.
DE3039425A1 (de) * 1980-10-18 1982-05-19 Ernst Leitz Wetzlar Gmbh, 6330 Wetzlar Einrichtung zur fotoelektrischen bestimmung der lage mindestens einer schaerfenebene eines bildes
JPS59168835U (ja) * 1983-04-27 1984-11-12 パイオニア株式会社 光学式記録情報読取装置
JPS6022743A (ja) * 1984-04-24 1985-02-05 Olympus Optical Co Ltd 光学的に情報を記録したデイスク再生装置のピツクアツプ
DE3544771A1 (de) * 1985-12-18 1987-06-19 Messerschmitt Boelkow Blohm Verfahren und vorrichtung zur abbildung eines gegenstandes auf einen detektor mit voneinander durch totraeume getrennten strahlungsempfindlichen bereichen
JPS62163978U (https=) * 1986-04-08 1987-10-17
US4835380A (en) * 1987-06-11 1989-05-30 U. S. Philips Corporation Scanning device for an optical recording and/or reproducing apparatus
JP2676371B2 (ja) * 1988-07-04 1997-11-12 パイオニア株式会社 ピックアップの高さ調整装置
NL8803055A (nl) * 1988-12-13 1990-07-02 Philips Nv Optische aftastinrichting, spiegelobjektief geschikt voor toepassing daarin en optisch inschrijf- en/of uitleesapparaat voorzien van deze aftastinrichting.
NL8803048A (nl) * 1988-12-13 1990-07-02 Philips Nv Optische aftastinrichting, spiegelobjektief geschikt voor toepassing daarin en optische inschrijf- en/of uitleesapparaat voorzien van de aftastinrichting.
DE4213556C2 (de) * 1992-04-24 1994-04-28 Max Planck Gesellschaft Einrichtung zur optischen Abtastung eines Aufzeichnungsträgers, insbesondere einer Phosphorspeicherplatte
CN109782962A (zh) * 2018-12-11 2019-05-21 中国科学院深圳先进技术研究院 一种投影交互方法、装置、系统及终端设备

Also Published As

Publication number Publication date
FR2309888A1 (fr) 1976-11-26
JPS51134604A (en) 1976-11-22
GB1541596A (en) 1979-03-07
DE2619232A1 (de) 1976-11-11
FR2309888B1 (https=) 1977-11-10
JPS5931776B2 (ja) 1984-08-04

Similar Documents

Publication Publication Date Title
CA1071330A (en) Optical focussing read-out device
US4337531A (en) Scanning head for an optical disc system
US4152586A (en) Optical transducer and focusing system
US4445209A (en) Dithered focusing systems
US4223347A (en) Videodisc with undulating nested tracks
JPS58501846A (ja) 光学デ−タディスクシステムにおける改良されたトラック選択のためのガルボ位置センサ
US4703467A (en) Video disc read back scanner
JPS61160845A (ja) 光デイスクの記録再生装置
US5148010A (en) Automatic focusing apparatus and method includes a photorefractive crystal having a lens effect
GB1566003A (en) Servomechanisms for recording and/or reproducing apparatus using a rotatable record carrier
US3654401A (en) Playback system with radiation guide member having a slide portion extending into the groove
US3614310A (en) Electrooptical apparatus employing a hollow beam for translating an image of an object
GB1434060A (en) Constant magnification optical system
GB1508881A (en) Record carrier on which information is stored in an optically readable structure
JPS598892B2 (ja) 信号の光学的記録再生装置
NL8103505A (nl) Inrichting voor het puntsgewijs aftasten van een voorwerp.
GB1502630A (en) Apparatus for reading a record carrier on which information is stored in an optically readable structure
US4044378A (en) Optical system for reflective mode video playback apparatus
US4058834A (en) System for making a light beam scan a flat carrier with autofocusing
JPH0644597A (ja) 読取り装置
JPS60121578A (ja) トラッキング制御装置
JPS61117744A (ja) マルチビ−ム光ヘツド及びその光デイスク装置
US4048492A (en) Method and apparatus for automatic focusing an optical system with a scanning grating
US4310911A (en) Control information detecting method and apparatus in optical-type video disc player
Laub Optics of reflective videodisc players

Legal Events

Date Code Title Description
MKEX Expiry