GB1541596A - Optical focussing read-out device - Google Patents

Optical focussing read-out device

Info

Publication number
GB1541596A
GB1541596A GB1711576A GB1711576A GB1541596A GB 1541596 A GB1541596 A GB 1541596A GB 1711576 A GB1711576 A GB 1711576A GB 1711576 A GB1711576 A GB 1711576A GB 1541596 A GB1541596 A GB 1541596A
Authority
GB
United Kingdom
Prior art keywords
read
out device
optical focussing
focussing
optical
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
GB1711576A
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 GB1541596A publication Critical patent/GB1541596A/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
GB1711576A 1975-04-30 1976-04-27 Optical focussing read-out device Expired GB1541596A (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
GB1541596A true GB1541596A (en) 1979-03-07

Family

ID=9154695

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1711576A Expired GB1541596A (en) 1975-04-30 1976-04-27 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=)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0294902B1 (en) * 1987-06-11 1991-12-18 Koninklijke Philips Electronics N.V. Optical scanning device, mirror objective suitable for use therein and an optical recording and/or reproducing apparatus provided therewith

Families Citing this family (13)

* 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
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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0294902B1 (en) * 1987-06-11 1991-12-18 Koninklijke Philips Electronics N.V. Optical scanning device, mirror objective suitable for use therein and an optical recording and/or reproducing apparatus provided therewith

Also Published As

Publication number Publication date
FR2309888A1 (fr) 1976-11-26
JPS51134604A (en) 1976-11-22
DE2619232A1 (de) 1976-11-11
FR2309888B1 (https=) 1977-11-10
JPS5931776B2 (ja) 1984-08-04
CA1071330A (en) 1980-02-05

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee