FR2385173A1 - DEVICE FOR READING A RECORDING HOLDER REFLECTING OPTICAL RADIATION - Google Patents

DEVICE FOR READING A RECORDING HOLDER REFLECTING OPTICAL RADIATION

Info

Publication number
FR2385173A1
FR2385173A1 FR7808297A FR7808297A FR2385173A1 FR 2385173 A1 FR2385173 A1 FR 2385173A1 FR 7808297 A FR7808297 A FR 7808297A FR 7808297 A FR7808297 A FR 7808297A FR 2385173 A1 FR2385173 A1 FR 2385173A1
Authority
FR
France
Prior art keywords
reading
focusing
optical radiation
reflecting optical
recording holder
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
FR7808297A
Other languages
French (fr)
Other versions
FR2385173B1 (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/en
Application filed by Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of FR2385173A1 publication Critical patent/FR2385173A1/en
Application granted granted Critical
Publication of FR2385173B1 publication Critical patent/FR2385173B1/fr
Granted 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

Le dispositif est muni d'un système de détection de défauts de focalisation opto-électronique Dans le trajet des rayons du faisceau de lecture émis vers le porteur d'information est inséré un élément déviateur de rayonnement Le faisceau de focalisation dérivé par cet élément du faisceau de lecture coopère avec deux détecteurs de focalisation, la différence entre les signaux de sortie des détecteurs de focalisation étant déterminée par le degré de focalisation du faisceau de lecture sur la structure d'information. Application : la lecture d'un porteur d'un programme de télévision.The device is fitted with an opto-electronic focusing defect detection system In the path of the rays of the reading beam emitted towards the information carrier is inserted a radiation deflector element The focusing beam derived by this element of the beam reading cooperates with two focusing detectors, the difference between the output signals of the focusing detectors being determined by the degree of focusing of the reading beam on the information structure. Application: the reading of a carrier of a television program.

FR7808297A 1977-03-23 1978-03-22 DEVICE FOR READING A RECORDING HOLDER REFLECTING OPTICAL RADIATION Granted FR2385173A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL7703123A NL7703123A (en) 1977-03-23 1977-03-23 DEVICE FOR READING AN OPTICAL RADIATION-REFLECTING REGISTRATION CARRIER.
NL7706753A NL7706753A (en) 1977-03-23 1977-06-20 DEVICE FOR READING AN OPTICAL RADIATION-REFLECTING INFORMATION CARRIER.

Publications (2)

Publication Number Publication Date
FR2385173A1 true FR2385173A1 (en) 1978-10-20
FR2385173B1 FR2385173B1 (en) 1985-05-10

Family

ID=26645307

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7808297A Granted FR2385173A1 (en) 1977-03-23 1978-03-22 DEVICE FOR READING A RECORDING HOLDER REFLECTING OPTICAL RADIATION

Country Status (16)

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

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0022682A1 (en) * 1979-06-29 1981-01-21 Thomson-Csf Optical reading head with semi-conductor laser source and device for reading a record carrier by using reflexion, comprising such an optical head
FR2541029A1 (en) * 1983-02-15 1984-08-17 Pioneer Electronic Corp APPARATUS FOR OPTICALLY READING INFORMATION
FR2541001A1 (en) * 1983-02-15 1984-08-17 Gen Electric OPTICAL PROJECTOR FOR DETERMINING A POSITION AND METHOD FOR DETERMINING

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7809635A (en) * 1978-09-22 1980-03-25 Philips Nv DEVICE FOR READING AN OPTICAL REGISTRATION CARRIER CONTAINING A RADIATION-REFLECTING INFORMATION STRUCTURE.
NL186353C (en) * 1979-06-12 1990-11-01 Philips Nv DEVICE FOR IMAGING A MASK PATTERN ON A SUBSTRATE EQUIPPED WITH AN OPTO-ELECTRONIC DETECTION SYSTEM FOR DETERMINING A DEROGATION BETWEEN THE IMAGE OF A PROJECT SYSTEM AND THE SUBSTRATE PLATE.
JPS5870434A (en) * 1981-10-22 1983-04-26 Toshiba Corp Optical head
JPS57186240A (en) * 1981-11-09 1982-11-16 Teac Co Optical reproducing device
JPS59119548A (en) * 1982-12-25 1984-07-10 Pioneer Electronic Corp Optical pickup device
JPS60197950A (en) * 1984-03-22 1985-10-07 Toshiba Corp Optical head
JPH0626972Y2 (en) * 1986-10-03 1994-07-20 パイオニア株式会社 Optical pickup device

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2313716A1 (en) * 1975-06-03 1976-12-31 Thomson Brandt OPTICAL READING SYSTEM BY REFLECTION OF AN INFORMATION MEDIA

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0022682A1 (en) * 1979-06-29 1981-01-21 Thomson-Csf Optical reading head with semi-conductor laser source and device for reading a record carrier by using reflexion, comprising such an optical head
FR2460523A1 (en) * 1979-06-29 1981-01-23 Thomson Csf SEMICONDUCTOR LASER SOURCE OPTICAL READING HEAD AND DEVICE FOR REFLECTING AN INFORMATION MEDIUM COMPRISING SUCH AN OPTICAL HEAD
FR2541029A1 (en) * 1983-02-15 1984-08-17 Pioneer Electronic Corp APPARATUS FOR OPTICALLY READING INFORMATION
FR2541001A1 (en) * 1983-02-15 1984-08-17 Gen Electric OPTICAL PROJECTOR FOR DETERMINING A POSITION AND METHOD FOR DETERMINING

Also Published As

Publication number Publication date
DK124478A (en) 1978-09-24
JPS6028055B2 (en) 1985-07-02
BE865140A (en) 1978-09-21
IT7821384A0 (en) 1978-03-20
SE424677B (en) 1982-08-02
DE2810566A1 (en) 1978-09-28
IT1093249B (en) 1985-07-19
DD135654A5 (en) 1979-05-16
GB1589035A (en) 1981-05-07
ATA200278A (en) 1982-10-15
BR7801692A (en) 1979-01-02
DE2810566C2 (en) 1988-01-21
ES468083A1 (en) 1978-12-16
FR2385173B1 (en) 1985-05-10
AU516903B2 (en) 1981-06-25
NL7706753A (en) 1978-12-22
CA1116294A (en) 1982-01-12
SE7803140L (en) 1978-09-24
JPS53118103A (en) 1978-10-16
AU3429278A (en) 1979-09-27
AR217276A1 (en) 1980-03-14
AT371275B (en) 1983-06-10

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Legal Events

Date Code Title Description
ST Notification of lapse