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ES468083A1 - Un aparato perfeccionado para leer un soporte de informacionreflectante de la radiacion optica. - Google Patents

Un aparato perfeccionado para leer un soporte de informacionreflectante de la radiacion optica.

Info

Publication number
ES468083A1
ES468083A1 ES468083A ES468083A ES468083A1 ES 468083 A1 ES468083 A1 ES 468083A1 ES 468083 A ES468083 A ES 468083A ES 468083 A ES468083 A ES 468083A ES 468083 A1 ES468083 A1 ES 468083A1
Authority
ES
Spain
Prior art keywords
focusing
radiation
information
read beam
target system
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
ES468083A
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.)
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
Priority claimed from NL7703123A external-priority patent/NL7703123A/xx
Application filed by Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of ES468083A1 publication Critical patent/ES468083A1/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
    • 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
    • G11B7/08—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
    • 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

  • Optical Recording Or Reproduction (AREA)
  • Optical Head (AREA)
  • Automatic Focus Adjustment (AREA)
  • Analysing Materials By The Use Of Radiation (AREA)

Abstract

Un aparato perfeccionado para leer un soporte de información reflectante de la radiación óptica, cuyo aparato comprende una fuente de radiación que produce un haz de leer, una sistema de objetivo para enfocar el haz de leer en un punto de leer sobre la estructura de la información del soporte de información y para formar la imagen del punto de leer sobre un detector de información sensible a la radiación cuya señal de salida representa la información y un sistema de detección de error de enfoque óptico-electrónico para determinar una desviación entre la posición deseada y la posición real del plano de enfoque del sistema de objetivo, cuyo sistema de detección del error de enfoque comprende dos detectores de enfoque sensibles a la radiación los cuales cooperan con un haz de enfoque estrecho, proporcionando la diferencia entre la señal de salida de los detectores de enfoque una indicación acerca de dicha desviación, caracterizado porque la trayectoria de la radiación del haz de leera un lado del eje óptico del sistema de objetivo incluye un elemento de desviación de la radiación, cuya área superficial es sustancialmente menor que el área transversal del haz de leer.
ES468083A 1977-03-23 1978-03-21 Un aparato perfeccionado para leer un soporte de informacionreflectante de la radiacion optica. Expired ES468083A1 (es)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL7703123A NL7703123A (nl) 1977-03-23 1977-03-23 Inrichting voor het uitlezen van een optische stralingsreflekterende registratiedrager.
NL7706753A NL7706753A (nl) 1977-03-23 1977-06-20 Inrichting voor het uitlezen van een optische stralingsreflekterende informatiedrager.

Publications (1)

Publication Number Publication Date
ES468083A1 true ES468083A1 (es) 1978-12-16

Family

ID=26645307

Family Applications (1)

Application Number Title Priority Date Filing Date
ES468083A Expired ES468083A1 (es) 1977-03-23 1978-03-21 Un aparato perfeccionado para leer un soporte de informacionreflectante de la radiacion optica.

Country Status (16)

Country Link
JP (1) JPS6028055B2 (es)
AR (1) AR217276A1 (es)
AT (1) AT371275B (es)
AU (1) AU516903B2 (es)
BE (1) BE865140A (es)
BR (1) BR7801692A (es)
CA (1) CA1116294A (es)
DD (1) DD135654A5 (es)
DE (1) DE2810566A1 (es)
DK (1) DK124478A (es)
ES (1) ES468083A1 (es)
FR (1) FR2385173A1 (es)
GB (1) GB1589035A (es)
IT (1) IT1093249B (es)
NL (1) NL7706753A (es)
SE (1) SE424677B (es)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7809635A (nl) * 1978-09-22 1980-03-25 Philips Nv Inrichting voor het uitlezen van een optische registra- tiedrager bevattende een stralingsreflekterende infor- matiestruktuur.
NL186353C (nl) * 1979-06-12 1990-11-01 Philips Nv Inrichting voor het afbeelden van een maskerpatroon op een substraat voorzien van een opto-elektronisch detektiestelsel voor het bepalen van een afwijking tussen het beeldvlak van een projektielenzenstelsel en het substraatvlak.
FR2460523A1 (fr) * 1979-06-29 1981-01-23 Thomson Csf Tete de lecture optique a source laser a semi-conducteur et dispositif de lecture par reflexion d'un support d'information comportant une telle tete optique
JPS5870434A (ja) * 1981-10-22 1983-04-26 Toshiba Corp 光学ヘツド
JPS57186240A (en) * 1981-11-09 1982-11-16 Teac Co Optical reproducing device
JPS59119548A (ja) * 1982-12-25 1984-07-10 Pioneer Electronic Corp 光学式ピツクアツプ装置
US4630927A (en) * 1983-02-15 1986-12-23 General Electric Company Optical projector
JPS59125727U (ja) * 1983-02-15 1984-08-24 パイオニア株式会社 光学式情報ピツクアツプ装置
JPS60197950A (ja) * 1984-03-22 1985-10-07 Toshiba Corp 光学ヘツド
JPH0626972Y2 (ja) * 1986-10-03 1994-07-20 パイオニア株式会社 光学式ピツクアツプ装置

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2313716A1 (fr) * 1975-06-03 1976-12-31 Thomson Brandt Systeme optique de lecture par reflexion d'un support d'information

Also Published As

Publication number Publication date
DD135654A5 (de) 1979-05-16
AR217276A1 (es) 1980-03-14
JPS53118103A (en) 1978-10-16
GB1589035A (en) 1981-05-07
IT7821384A0 (it) 1978-03-20
AT371275B (de) 1983-06-10
SE424677B (sv) 1982-08-02
NL7706753A (nl) 1978-12-22
DK124478A (da) 1978-09-24
BE865140A (fr) 1978-09-21
FR2385173A1 (fr) 1978-10-20
IT1093249B (it) 1985-07-19
SE7803140L (sv) 1978-09-24
JPS6028055B2 (ja) 1985-07-02
DE2810566A1 (de) 1978-09-28
ATA200278A (de) 1982-10-15
CA1116294A (en) 1982-01-12
AU516903B2 (en) 1981-06-25
AU3429278A (en) 1979-09-27
FR2385173B1 (es) 1985-05-10
BR7801692A (pt) 1979-01-02
DE2810566C2 (es) 1988-01-21

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