FR2330062A1 - Dispositif de recherche de focalisation et lecteur optique comportant un tel dispositif - Google Patents
Dispositif de recherche de focalisation et lecteur optique comportant un tel dispositifInfo
- Publication number
- FR2330062A1 FR2330062A1 FR7533465A FR7533465A FR2330062A1 FR 2330062 A1 FR2330062 A1 FR 2330062A1 FR 7533465 A FR7533465 A FR 7533465A FR 7533465 A FR7533465 A FR 7533465A FR 2330062 A1 FR2330062 A1 FR 2330062A1
- Authority
- FR
- France
- Prior art keywords
- optical reader
- focus search
- reader including
- search device
- focus
- 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
- 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
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
-
- 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
- G11B7/085—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam into, or out of, its operative position or across tracks, otherwise than during the transducing operation, e.g. for adjustment or preliminary positioning or track change or selection
- G11B7/0857—Arrangements for mechanically moving the whole head
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Automatic Focus Adjustment (AREA)
- Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
- Optical Recording Or Reproduction (AREA)
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7533465A FR2330062A1 (fr) | 1975-10-31 | 1975-10-31 | Dispositif de recherche de focalisation et lecteur optique comportant un tel dispositif |
US05/735,891 US4128847A (en) | 1975-10-31 | 1976-10-26 | Optical reading device comprising a focussing detection device |
GB44955/76A GB1561541A (en) | 1975-10-31 | 1976-10-28 | Optical reading device comprising a focusing de |
CA264,603A CA1073254A (fr) | 1975-10-31 | 1976-10-28 | Lecteur optique avec detecteur a focalisation |
DE2649688A DE2649688C2 (de) | 1975-10-31 | 1976-10-29 | Einrichtung zur Steuerung der Fokussierung eines Lichtbündels auf einem optisch lesbaren beweglichen Informationsträger |
JP51131557A JPS5838855B2 (ja) | 1975-10-31 | 1976-11-01 | 光学的読取装置 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7533465A FR2330062A1 (fr) | 1975-10-31 | 1975-10-31 | Dispositif de recherche de focalisation et lecteur optique comportant un tel dispositif |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2330062A1 true FR2330062A1 (fr) | 1977-05-27 |
FR2330062B1 FR2330062B1 (fr) | 1979-07-06 |
Family
ID=9161915
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7533465A Granted FR2330062A1 (fr) | 1975-10-31 | 1975-10-31 | Dispositif de recherche de focalisation et lecteur optique comportant un tel dispositif |
Country Status (6)
Country | Link |
---|---|
US (1) | US4128847A (fr) |
JP (1) | JPS5838855B2 (fr) |
CA (1) | CA1073254A (fr) |
DE (1) | DE2649688C2 (fr) |
FR (1) | FR2330062A1 (fr) |
GB (1) | GB1561541A (fr) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0020199A1 (fr) * | 1979-05-31 | 1980-12-10 | Thomson-Brandt | Système de commande de changement de face lue pour un lecteur optique de support d'information |
WO1986005306A1 (fr) * | 1985-03-09 | 1986-09-12 | Deutsche Thomson-Brandt Gmbh | Procede et conception de circuit pour la focalisation d'un faisceau lumineux sur un support d'enregistrement optique |
Families Citing this family (37)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA1131361A (fr) * | 1977-05-11 | 1982-09-07 | Fumitaka Kotaka | Servomecanisme de focalisation pour afficheur optique |
US4439848A (en) * | 1978-03-27 | 1984-03-27 | Discovision Associates | Focusing system for video disc player |
SE7813460L (sv) * | 1978-03-27 | 1979-09-28 | Mca Disco Vision | Videoskivspelare |
JPS6038771B2 (ja) * | 1978-06-19 | 1985-09-03 | パイオニア株式会社 | 光学式情報読取装置のサ−ボ装置 |
US4374323A (en) * | 1978-06-30 | 1983-02-15 | Discovision Associates | Focusing apparatus for use in a system for recovering information from an optically-readable storage medium |
JPS5538639A (en) * | 1978-09-07 | 1980-03-18 | Pioneer Video Corp | Servo drawing-in unit for focus lens of optical information reader |
US4223349A (en) * | 1978-11-16 | 1980-09-16 | Mca Discovision, Inc. | System for rotating an information storage disc at a variable angular velocity to recover information therefrom at a prescribed constant rate |
US4383757A (en) * | 1979-04-02 | 1983-05-17 | Optimetrix Corporation | Optical focusing system |
US4540278A (en) * | 1979-04-02 | 1985-09-10 | Optimetrix Corporation | Optical focusing system |
JPS6030015B2 (ja) * | 1979-05-09 | 1985-07-13 | 株式会社日立製作所 | 光ビ−ム位置制御装置 |
JPS5694528A (en) * | 1979-12-28 | 1981-07-31 | Matsushita Electric Ind Co Ltd | Drawing-in method of focus servo |
US4307294A (en) * | 1980-03-04 | 1981-12-22 | Campbell Duncan B | Electro-mechanical control means for space communication receiver |
DE3019239A1 (de) * | 1980-05-20 | 1981-11-26 | SIEMENS AG AAAAA, 1000 Berlin und 8000 München | Umhuellung fuer halbleiterbauelement |
NL8003729A (nl) * | 1980-06-27 | 1982-01-18 | Philips Nv | Inrichting voor optische scherpstelling. |
JPS57120239A (en) * | 1981-01-17 | 1982-07-27 | Sharp Corp | Focus servomechanism of optical information reader |
JPS5877035A (ja) * | 1981-10-08 | 1983-05-10 | Mitsubishi Electric Corp | 自動焦点引込み装置 |
JPS5885940A (ja) * | 1981-11-17 | 1983-05-23 | Hitachi Ltd | 光デイスクの自動焦点引込み方法 |
JPS58101330U (ja) * | 1981-12-25 | 1983-07-09 | パイオニア株式会社 | 光学装置におけるフオ−カスサ−ボ引込装置 |
US4446546A (en) * | 1981-12-31 | 1984-05-01 | Magnetic Peripherals Inc. | Focus initialization system for optical recording |
JPS58121137A (ja) * | 1982-01-09 | 1983-07-19 | Sony Corp | 光学式デイスク再生装置のフオ−カス引込み回路 |
JPS58155527A (ja) * | 1982-03-10 | 1983-09-16 | Hitachi Ltd | 光デイスクプレ−ヤのフオ−カス引き込み回路 |
US4669074A (en) * | 1982-05-19 | 1987-05-26 | Burroughs Corporation | Focusing control circuitry for an optical memory system |
DE3368794D1 (en) * | 1982-05-19 | 1987-02-05 | Burroughs Corp | Optical memory system having improved positioning and focusing control circuitry |
EP0095852A1 (fr) * | 1982-05-19 | 1983-12-07 | BURROUGHS CORPORATION (a Michigan corporation) | Dispositif de commande de focalisation d'un système de mémoire optique |
US4674076A (en) * | 1982-05-19 | 1987-06-16 | Burroughs Corporation | Optical memory system having improved positioning and focusing control circuitry |
JPH0670855B2 (ja) * | 1983-04-07 | 1994-09-07 | 三菱電機株式会社 | 光学式ディスクプレ−ヤ |
JPS6077023U (ja) * | 1983-11-01 | 1985-05-29 | パイオニア株式会社 | 記録情報読取装置のフオ−カスレンズ移動制御装置 |
JPS60123763U (ja) * | 1984-01-30 | 1985-08-21 | パイオニア株式会社 | 記録情報再生装置 |
JPS61188745A (ja) * | 1985-02-15 | 1986-08-22 | Olympus Optical Co Ltd | フオ−カスサ−ボ制御方式 |
EP0236503B1 (fr) * | 1985-09-10 | 1992-01-22 | Mitsubishi Denki Kabushiki Kaisha | Dispositif a tete optique |
DE3536700C3 (de) * | 1985-10-15 | 1994-07-07 | Focus Mestechnik Gmbh & Co Kg | Gerät zum Ermitteln des lokalen Abstandes einer Prüffläche von einer Referenzfläche, deren geometrische Lage in bezug auf das Gerät bekannt ist |
US4760269A (en) * | 1986-05-20 | 1988-07-26 | The Mitre Corporation | Method and apparatus for measuring distance to an object |
JPH01116926A (ja) * | 1987-10-29 | 1989-05-09 | Csk Corp | 光メモリカードの書込装置 |
US4832575A (en) * | 1988-01-11 | 1989-05-23 | Spectra Physics | Automatic test system for check valve closure in pump for liquid chromatography system |
NL8803012A (nl) * | 1988-12-08 | 1990-07-02 | Philips Nv | Optische aftastinrichting voorzien van een focusseerregelsysteem alsmede een geintegreerde schakeling voor toepassing in het focusseerregelsysteem. |
JPH0643848Y2 (ja) * | 1990-03-15 | 1994-11-14 | 松下電器産業株式会社 | 光集束位置制御装置 |
US20090310466A1 (en) * | 2005-12-15 | 2009-12-17 | Pioneer Corporation | Objective lens driving device and driving method for the same |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2216077C3 (de) * | 1972-04-01 | 1978-04-20 | Loewe Opta Gmbh, 1000 Berlin | Automatische Spurabtast-Regelschaltung für Video-Magnetband-Aufzeichnungsund Wiedergabegerät |
FR2222665B1 (fr) * | 1973-03-21 | 1975-10-31 | Thomson Brandt | |
FR2251876B1 (fr) * | 1973-11-16 | 1977-09-23 | Thomson Brandt | |
US3932700A (en) * | 1974-02-04 | 1976-01-13 | Zenith Radio Corporation | Focus tracking registration for optical reproducing systems |
US3918071A (en) * | 1974-04-11 | 1975-11-04 | Fritz Albrecht | Automatic lens focusing method and apparatus |
-
1975
- 1975-10-31 FR FR7533465A patent/FR2330062A1/fr active Granted
-
1976
- 1976-10-26 US US05/735,891 patent/US4128847A/en not_active Expired - Lifetime
- 1976-10-28 GB GB44955/76A patent/GB1561541A/en not_active Expired
- 1976-10-28 CA CA264,603A patent/CA1073254A/fr not_active Expired
- 1976-10-29 DE DE2649688A patent/DE2649688C2/de not_active Expired
- 1976-11-01 JP JP51131557A patent/JPS5838855B2/ja not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0020199A1 (fr) * | 1979-05-31 | 1980-12-10 | Thomson-Brandt | Système de commande de changement de face lue pour un lecteur optique de support d'information |
FR2458126A1 (fr) * | 1979-05-31 | 1980-12-26 | Thomson Brandt | Systeme de commande de changement de face lue pour un lecteur optique de support d'information et lecteur optique comportant un tel systeme |
WO1986005306A1 (fr) * | 1985-03-09 | 1986-09-12 | Deutsche Thomson-Brandt Gmbh | Procede et conception de circuit pour la focalisation d'un faisceau lumineux sur un support d'enregistrement optique |
Also Published As
Publication number | Publication date |
---|---|
FR2330062B1 (fr) | 1979-07-06 |
DE2649688A1 (de) | 1977-05-05 |
CA1073254A (fr) | 1980-03-11 |
GB1561541A (en) | 1980-02-20 |
JPS5838855B2 (ja) | 1983-08-25 |
JPS5257803A (en) | 1977-05-12 |
US4128847A (en) | 1978-12-05 |
DE2649688C2 (de) | 1984-04-05 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
FR2330062A1 (fr) | Dispositif de recherche de focalisation et lecteur optique comportant un tel dispositif | |
FR2330027A1 (fr) | Dispositif de focalisation a vergence variable et lecteur optique comportant un tel dispositif | |
FR2325953A1 (fr) | Senseur optique de focalisation et dispositif de focalisation comportant un tel senseur | |
FR2323160A1 (fr) | Dispositif optique de projection et lecteur optique comportant un tel dispositif | |
IT1028311B (it) | Dispositivo di focalizzazione e lettore ottico comportanteun siffatto dispositivo | |
IT1062979B (it) | Dispositivo di focalizzazione e lettura ottica comportante un siffatto dispositivo | |
FR2337473A1 (fr) | Systeme de detection d'ecart de focalisation et lecteur optique video utilisant un tel systeme | |
NL7710878A (nl) | Draagbare optische karakterherkenningsinrich- ting. | |
FR2325951A1 (fr) | Procede de diminution de bruit optique et dispositif mettant en oeuvre un tel procede | |
BR7702984A (pt) | Dispositivo de explosao optica | |
FR2321711A1 (fr) | Dispositif optique a mise au point automatique et lecteur optique comportant un tel dispositif | |
BE859252A (fr) | Dispositif de reconnaissance optique de caracteres | |
NL183909C (nl) | Optische leesinrichting. | |
NL7611727A (nl) | Optische aftastinrichting. | |
NL7806068A (nl) | Optisch omzettings- en scherpstellingsinrichting. | |
BE875307A (fr) | Dispositif pour element optique | |
NO149780C (no) | Anordning ved lense | |
FR2319913A1 (fr) | Dispositif de mise au point d'objectifs a focale variable | |
ES505077A0 (es) | Un dispositivo enfocador optico | |
FR2309888A1 (fr) | Dispositif optique de projection et lecteur optique comportant un tel dispositif | |
SE7805414L (sv) | Optisk teckenlesare | |
ES492322A0 (es) | Un dispositivo de enfoque optico | |
FR2341145A1 (fr) | Dispositif de balayage optique | |
FR2317772A1 (fr) | Dispositif de balayage optique a couplage de charges | |
NL7707512A (nl) | Optisch analytisch toestel. |