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 dispositifInfo
- 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
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL 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
- G02F1/00—Devices 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
- G02F1/29—Devices 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
-
- 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
- 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)
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)
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)
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)
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 |
-
1975
- 1975-10-28 FR FR7532931A patent/FR2330027A1/fr active Granted
-
1976
- 1976-10-22 US US05/734,974 patent/US4124273A/en not_active Expired - Lifetime
- 1976-10-25 GB GB44289/76A patent/GB1534978A/en not_active Expired
- 1976-10-26 CA CA264,249A patent/CA1059601A/fr not_active Expired
- 1976-10-28 DE DE2649073A patent/DE2649073C2/de not_active Expired
- 1976-10-28 JP JP51128879A patent/JPS5255503A/ja active Pending
Cited By (6)
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 |