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FR2330027A1 - Dispositif de focalisation a vergence variable et lecteur optique comportant un tel dispositif - Google Patents

Dispositif de focalisation a vergence variable et lecteur optique comportant un tel dispositif

Info

Publication number
FR2330027A1
FR2330027A1 FR7532931A FR7532931A FR2330027A1 FR 2330027 A1 FR2330027 A1 FR 2330027A1 FR 7532931 A FR7532931 A FR 7532931A FR 7532931 A FR7532931 A FR 7532931A FR 2330027 A1 FR2330027 A1 FR 2330027A1
Authority
FR
France
Prior art keywords
optical reader
reader including
vergence
variable
focusing
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.)
Granted
Application number
FR7532931A
Other languages
English (en)
Other versions
FR2330027B1 (fr
Inventor
Jean-Pierre Huignard
Claude Puec
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
Priority to FR7532931A priority Critical patent/FR2330027A1/fr
Priority to US05/734,974 priority patent/US4124273A/en
Priority to GB44289/76A priority patent/GB1534978A/en
Priority to CA264,249A priority patent/CA1059601A/fr
Priority to JP51128879A priority patent/JPS5255503A/ja
Priority to DE2649073A priority patent/DE2649073C2/de
Publication of FR2330027A1 publication Critical patent/FR2330027A1/fr
Application granted granted Critical
Publication of FR2330027B1 publication Critical patent/FR2330027B1/fr
Granted legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/29Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the position or the direction of light beams, i.e. deflection
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00Recording 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
    • G11B7/08Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/09Disposition 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
    • G11B7/0908Disposition 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

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Automatic Focus Adjustment (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Optical Head (AREA)
FR7532931A 1975-10-28 1975-10-28 Dispositif de focalisation a vergence variable et lecteur optique comportant un tel dispositif Granted FR2330027A1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
FR7532931A FR2330027A1 (fr) 1975-10-28 1975-10-28 Dispositif de focalisation a vergence variable et lecteur optique comportant un tel dispositif
US05/734,974 US4124273A (en) 1975-10-28 1976-10-22 Variable vergency focussing apparatus
GB44289/76A GB1534978A (en) 1975-10-28 1976-10-25 Variable focal length apparatus
CA264,249A CA1059601A (fr) 1975-10-28 1976-10-26 Appareil de mise au point a vergence variable
JP51128879A JPS5255503A (en) 1975-10-28 1976-10-28 Variable focuding device
DE2649073A DE2649073C2 (de) 1975-10-28 1976-10-28 Fokussierungseinrichtung mit elektrooptischen Teilen und deren Verwendung in einem optischen Leser

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7532931A FR2330027A1 (fr) 1975-10-28 1975-10-28 Dispositif de focalisation a vergence variable et lecteur optique comportant un tel dispositif

Publications (2)

Publication Number Publication Date
FR2330027A1 true FR2330027A1 (fr) 1977-05-27
FR2330027B1 FR2330027B1 (fr) 1982-05-14

Family

ID=9161740

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7532931A Granted FR2330027A1 (fr) 1975-10-28 1975-10-28 Dispositif de focalisation a vergence variable et lecteur optique comportant un tel dispositif

Country Status (6)

Country Link
US (1) US4124273A (fr)
JP (1) JPS5255503A (fr)
CA (1) CA1059601A (fr)
DE (1) DE2649073C2 (fr)
FR (1) FR2330027A1 (fr)
GB (1) GB1534978A (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2425085A1 (fr) * 1978-05-05 1979-11-30 Quantel Sa Objectif a longueur focale variable
FR2518295A1 (fr) * 1981-12-11 1983-06-17 Philips Nv Systeme de detection de defauts de focalisation optique
FR2575838A1 (fr) * 1985-01-09 1986-07-11 Canon Kk Objectif a distance focale variable
EP0837455A2 (fr) * 1996-10-21 1998-04-22 Deutsche Thomson-Brandt Gmbh Appareil pour lire et écrire sur un support d'enregistrement optique

Families Citing this family (36)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4445209A (en) * 1979-08-27 1984-04-24 Discovision Associates Dithered focusing systems
US4376568A (en) * 1981-01-12 1983-03-15 Xerox Corporation Thick film line modulator
US4466703A (en) * 1981-03-24 1984-08-21 Canon Kabushiki Kaisha Variable-focal-length lens using an electrooptic effect
JPS581126A (ja) * 1981-06-26 1983-01-06 Canon Inc 焦点距離可変レンズ
JPS5812143A (ja) * 1981-07-13 1983-01-24 Canon Inc 光学的情報の入出力装置
US4475179A (en) * 1982-06-30 1984-10-02 Eastman Kodak Company Optical disc write/read methods and apparatus with improved focus and tracking control
JPS5922010A (ja) * 1982-07-28 1984-02-04 Sorigoole Japan:Kk 自動焦点調整方法及びその装置
US4572616A (en) * 1982-08-10 1986-02-25 Syracuse University Adaptive liquid crystal lens
US4872743A (en) * 1983-04-18 1989-10-10 Canon Kabushiki Kaisha Varifocal optical element
US4865426A (en) * 1983-04-19 1989-09-12 Canon Kabushiki Kaisha Variable aberration imaging optical system
DE3322709A1 (de) * 1983-06-24 1985-01-10 Daimler-Benz Ag, 7000 Stuttgart Optische abstandsmessvorrichtung
DE3322710C2 (de) * 1983-06-24 1986-05-28 Daimler-Benz Ag, 7000 Stuttgart Optische Abstandsmeßvorrichtung
FR2572515B1 (fr) * 1984-10-25 1993-06-18 Canon Kk Dispositif de detection de position
US4671624A (en) * 1985-03-25 1987-06-09 Hughes Aircraft Company Variable lens and birefringence compensator for continuous operation
US4848881A (en) * 1984-12-03 1989-07-18 Hughes Aircraft Company Variable lens and birefringence compensator
JPS61160715A (ja) * 1985-01-09 1986-07-21 Canon Inc 焦点距離可変レンズ
US5202789A (en) * 1987-10-16 1993-04-13 Kabushiki Kaisha Toshiba Optical system for preserving a state of polarization of light beam
US4793696A (en) * 1987-11-13 1988-12-27 Hoechst Celanese Corporation Method and apparatus for rapid focus control in an optical data storage device
JPH01230017A (ja) * 1988-03-10 1989-09-13 Ricoh Co Ltd 光学素子
US4972397A (en) * 1988-12-02 1990-11-20 Drexler Technology Corporation Dithering optical data logger
US4909589A (en) * 1988-12-11 1990-03-20 Morris Robert K Rotatable photonic coupling
US5140454A (en) * 1989-01-24 1992-08-18 Ricoh Company, Ltd. Electrooptic device
US5272561A (en) * 1989-01-24 1993-12-21 Ricoh Company, Ltd. Electrooptic device
US5124835A (en) * 1989-06-21 1992-06-23 Ricoh Company, Ltd. Optical scanning apparatus
US5134361A (en) * 1991-02-19 1992-07-28 The United States Of America As Represented By The Secretary Of The Navy Opitcal system for linearizing non-linear electro-optic
JPH0777031B2 (ja) * 1991-10-16 1995-08-16 インターナショナル・ビジネス・マシーンズ・コーポレイション 収差補償装置
JPH05134275A (ja) * 1991-11-12 1993-05-28 Hitachi Koki Co Ltd 光制御素子
JP3442845B2 (ja) * 1994-02-15 2003-09-02 富士写真フイルム株式会社 焦点位置可変光学系及び光ビーム走査装置
JPH08138262A (ja) * 1994-11-11 1996-05-31 Sony Corp 光学ピックアップ装置
US6437762B1 (en) * 1995-01-11 2002-08-20 William A. Birdwell Dynamic diffractive optical transform
US5930224A (en) * 1995-04-25 1999-07-27 Olympus Optical Co., Ltd. Information recording/reproduction apparatus
FR2755516B1 (fr) 1996-11-05 1999-01-22 Thomson Csf Dispositif compact d'illumination
DE19837425A1 (de) * 1998-08-18 2000-03-02 Andre Srowig Vorrichtung zur volumetrischen Wiedergabe eines dreidimensionalen Bildes in autostereoskopischer Darstellung durch gepulste Plasmaerzeugung in natürlicher Atmosphäre mittels eines einzelnen fokussierten Laserstrahls
US6480323B1 (en) 1998-12-18 2002-11-12 Carnegie Mellon University Two-dimensional beam scanner
FR2819061B1 (fr) * 2000-12-28 2003-04-11 Thomson Csf Dispositif de controle de polarisation dans une liaison optique
CN101185020B (zh) * 2005-06-20 2011-12-28 日本电信电话株式会社 电光器件

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1514638A1 (de) * 1965-12-10 1969-05-08 Siemens Ag Einrichtung zur Veraenderung des Divergenzwinkels optischer Wellen
US3424513A (en) * 1966-06-20 1969-01-28 Hughes Aircraft Co Electro-optic variable focal length lens
US3695745A (en) * 1970-01-18 1972-10-03 Nippon Electric Co Light wave guide circuit
NL7206376A (fr) * 1972-05-11 1973-11-13
FR2251876B1 (fr) * 1973-11-16 1977-09-23 Thomson Brandt

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2425085A1 (fr) * 1978-05-05 1979-11-30 Quantel Sa Objectif a longueur focale variable
FR2518295A1 (fr) * 1981-12-11 1983-06-17 Philips Nv Systeme de detection de defauts de focalisation optique
FR2575838A1 (fr) * 1985-01-09 1986-07-11 Canon Kk Objectif a distance focale variable
EP0837455A2 (fr) * 1996-10-21 1998-04-22 Deutsche Thomson-Brandt Gmbh Appareil pour lire et écrire sur un support d'enregistrement optique
EP0837455A3 (fr) * 1996-10-21 1998-08-12 Deutsche Thomson-Brandt Gmbh Appareil pour lire et écrire sur un support d'enregistrement optique
US5905708A (en) * 1996-10-21 1999-05-18 Deutsche Thomson-Brandt Gmbh Focusing two polarized beams onto different information carrier layers of a single optical disc

Also Published As

Publication number Publication date
GB1534978A (en) 1978-12-06
FR2330027B1 (fr) 1982-05-14
CA1059601A (fr) 1979-07-31
DE2649073A1 (de) 1977-05-12
DE2649073C2 (de) 1986-03-13
US4124273A (en) 1978-11-07
JPS5255503A (en) 1977-05-07

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Legal Events

Date Code Title Description
ST Notification of lapse