ES8204868A1 - Un dispositivo de enfoque optico - Google Patents

Un dispositivo de enfoque optico

Info

Publication number
ES8204868A1
ES8204868A1 ES503348A ES503348A ES8204868A1 ES 8204868 A1 ES8204868 A1 ES 8204868A1 ES 503348 A ES503348 A ES 503348A ES 503348 A ES503348 A ES 503348A ES 8204868 A1 ES8204868 A1 ES 8204868A1
Authority
ES
Spain
Prior art keywords
focusing
controls
focusing device
optical focusing
detection means
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
ES503348A
Other languages
English (en)
Other versions
ES503348A0 (es
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of ES503348A0 publication Critical patent/ES503348A0/es
Publication of ES8204868A1 publication Critical patent/ES8204868A1/es
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
    • 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
    • G11B7/0917—Focus-error methods other than those covered by G11B7/0909 - G11B7/0916
    • 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
    • G11B7/09—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
    • G11B7/0917—Focus-error methods other than those covered by G11B7/0909 - G11B7/0916
    • G11B2007/0924—Skewed beams methods (using an angled beam, i.e. a beam which is reflected from the disc at an angle different from 90°)

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Automatic Focus Adjustment (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Lens Barrels (AREA)

Abstract

DISPOSITIVO DE ENFOQUE OPTICO. COMPRENDE UNA FUENTE DE RADIACION (2), MEDIOS DE ENFOQUE (3, 4) PARA ENFOCAR LA RADIACION PROCEDENTE DE LA FUENTE DE RADIACION SOBRE UN OBJETO (2), MEDIOS DE DETECCION DE ERRORES (7) DE ENFOQUE Y MEDIOS DE CONTROL (8, 9) QUE MUEVEN LA FUENTE DE RADIACION Y/O LOS MEDIOS DE ENFOQUE A FIN DE REDUCIR EL ERROR DE ENFOQUE. LOS MEDIOS DE CONTROL ACTUAN TANTO SOBRE UNA PRIMERA PARTE (8), QUE PUEDE SER MOVIDA CON UNA VELOCIDAD MENOR QUE LA CORRESPONDIENTE A LA FRECUENCIA DE CONTROL SUPERIOR DESEADA DEL DISPOSITIVO, COMO SOBRE UNA SEGUNDA PARTE (9), QUE SE PUEDE MOVER SUSTANCIALMENTE MAS RAPIDA QUE LA PRIMERA PARTE. SE EMPLEA PARA LEER INFORMACION QUE ESTE OPTICAMENTE CODIFICADA SOBRE UN PORTADOR DE INFORMACION.
ES503348A 1980-06-27 1981-06-25 Un dispositivo de enfoque optico Expired ES8204868A1 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL8003729A NL8003729A (nl) 1980-06-27 1980-06-27 Inrichting voor optische scherpstelling.

Publications (2)

Publication Number Publication Date
ES503348A0 ES503348A0 (es) 1982-05-01
ES8204868A1 true ES8204868A1 (es) 1982-05-01

Family

ID=19835527

Family Applications (1)

Application Number Title Priority Date Filing Date
ES503348A Expired ES8204868A1 (es) 1980-06-27 1981-06-25 Un dispositivo de enfoque optico

Country Status (11)

Country Link
US (1) US4354103A (es)
JP (1) JPS5730810A (es)
AT (1) AT371277B (es)
AU (1) AU540312B2 (es)
CA (1) CA1160874A (es)
DE (1) DE3124219A1 (es)
ES (1) ES8204868A1 (es)
FR (1) FR2485781A1 (es)
GB (1) GB2078947B (es)
IT (1) IT1137923B (es)
NL (1) NL8003729A (es)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4418405A (en) * 1981-06-29 1983-11-29 Rca Corporation Lens positioning controller for optical playback apparatus
US4615621A (en) * 1982-04-02 1986-10-07 Eaton Corporation Auto-focus alignment and measurement system and method
US4580900A (en) * 1982-04-02 1986-04-08 Eaton Corporation Auto focus alignment and measurement system and method
JPS58179947A (ja) * 1982-04-15 1983-10-21 Olympus Optical Co Ltd 光情報再生装置における合焦検出方式
DE3219503C2 (de) * 1982-05-25 1985-08-08 Ernst Leitz Wetzlar Gmbh, 6330 Wetzlar Vorrichtung zum selbsttätigen Fokussieren auf in optischen Geräten zu betrachtende Objekte
WO1985000457A1 (en) * 1983-07-06 1985-01-31 Matsushita Electric Industrial Co., Ltd. Light pickup
US4797545A (en) * 1985-09-10 1989-01-10 Mitsubishi Denki Kabushiki Kaisha Optical head device having positionally adjustable parts
US4712887A (en) * 1985-12-20 1987-12-15 Dazar Corporation Optical system for fast access optical data storage device
US5097456A (en) * 1987-10-28 1992-03-17 Oki Electric Industry Co., Ltd. Optical head
US5251011A (en) * 1989-06-28 1993-10-05 Dainippon Screen Manufacturing Co., Ltd. Displacement detection system
US5663554A (en) * 1995-01-17 1997-09-02 Agfa Division, Bayer Corporation Weak lens focus adjusting mechanism based upon thickness of scanned material and imagesetter using same

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2309888A1 (fr) * 1975-04-30 1976-11-26 Thomson Brandt Dispositif optique de projection et lecteur optique comportant un tel dispositif
FR2330062A1 (fr) * 1975-10-31 1977-05-27 Thomson Brandt Dispositif de recherche de focalisation et lecteur optique comportant un tel dispositif
JPS606014B2 (ja) * 1976-10-07 1985-02-15 ソニー株式会社 情報検出装置
NL186121C (nl) * 1977-12-16 1990-09-17 Mitsubishi Electric Corp Automatisch focusseerapparaat.

Also Published As

Publication number Publication date
AU540312B2 (en) 1984-11-08
IT8122545A0 (it) 1981-06-24
NL8003729A (nl) 1982-01-18
IT1137923B (it) 1986-09-10
GB2078947B (en) 1984-05-16
ES503348A0 (es) 1982-05-01
GB2078947A (en) 1982-01-13
DE3124219A1 (de) 1982-02-04
FR2485781A1 (fr) 1981-12-31
ATA280181A (de) 1982-10-15
JPS5730810A (en) 1982-02-19
US4354103A (en) 1982-10-12
AT371277B (de) 1983-06-10
CA1160874A (en) 1984-01-24
AU7211181A (en) 1982-01-07

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