NL7803969A - Opto-elektronisch fokusfout-detektiestelsel. - Google Patents

Opto-elektronisch fokusfout-detektiestelsel.

Info

Publication number
NL7803969A
NL7803969A NL7803969A NL7803969A NL7803969A NL 7803969 A NL7803969 A NL 7803969A NL 7803969 A NL7803969 A NL 7803969A NL 7803969 A NL7803969 A NL 7803969A NL 7803969 A NL7803969 A NL 7803969A
Authority
NL
Netherlands
Prior art keywords
opto
detection system
error detection
focus error
electronic focus
Prior art date
Application number
NL7803969A
Other languages
English (en)
Original Assignee
Philips 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 Nv filed Critical Philips Nv
Priority to NL7803969A priority Critical patent/NL7803969A/nl
Priority to US05/925,432 priority patent/US4233502A/en
Priority to ZA791298A priority patent/ZA791298B/xx
Priority to AR275992A priority patent/AR218529A1/es
Priority to CA000324970A priority patent/CA1139878A/en
Priority to DE2914122A priority patent/DE2914122C2/de
Priority to AU45987/79A priority patent/AU523829B2/en
Priority to ES479542A priority patent/ES479542A1/es
Priority to IT21789/79A priority patent/IT1113877B/it
Priority to CH344779A priority patent/CH640362A5/de
Priority to JP4410379A priority patent/JPS54140533A/ja
Priority to DK151379A priority patent/DK148969C/da
Priority to BR7902270A priority patent/BR7902270A/pt
Priority to PL1979214822A priority patent/PL133015B1/pl
Priority to NZ190162A priority patent/NZ190162A/xx
Priority to GB7912766A priority patent/GB2020800B/en
Priority to SE7903206A priority patent/SE435980B/sv
Priority to BE0/194580A priority patent/BE875546A/xx
Priority to FR7909496A priority patent/FR2423025A1/fr
Priority to DD79212237A priority patent/DD151097A5/de
Priority to AT0287579A priority patent/AT371268B/de
Publication of NL7803969A publication Critical patent/NL7803969A/nl

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
    • G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
    • G11B7/1381—Non-lens elements for altering the properties of the beam, e.g. knife edges, slits, filters or stops
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/28—Systems for automatic generation of focusing signals
    • 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
    • G11B7/0916—Foucault or knife-edge methods
    • 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
    • G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
    • G11B7/1359—Single prisms
NL7803969A 1978-04-14 1978-04-14 Opto-elektronisch fokusfout-detektiestelsel. NL7803969A (nl)

Priority Applications (21)

Application Number Priority Date Filing Date Title
NL7803969A NL7803969A (nl) 1978-04-14 1978-04-14 Opto-elektronisch fokusfout-detektiestelsel.
US05/925,432 US4233502A (en) 1978-04-14 1978-07-17 Opto-electronic focussing error detection arrangement
ZA791298A ZA791298B (en) 1978-04-14 1979-03-19 Opto-electronic focussing error detection arrangement
AR275992A AR218529A1 (es) 1978-04-14 1979-03-29 Disposicion opto-electronica detectora de errores de enfoque
CA000324970A CA1139878A (en) 1978-04-14 1979-04-05 Opto-electronic focussing error detection arrangement
DE2914122A DE2914122C2 (de) 1978-04-14 1979-04-07 Opto-elektronische Einrichtung zur Erzeugung eines Fokussierungssignals
AU45987/79A AU523829B2 (en) 1978-04-14 1979-04-10 Error detection
ES479542A ES479542A1 (es) 1978-04-14 1979-04-11 Una disposicion opto-electronica de deteccion de errores de enfoque.
IT21789/79A IT1113877B (it) 1978-04-14 1979-04-11 Complesso optoelettronico di rivelazione degli errori di focalizzazione
CH344779A CH640362A5 (de) 1978-04-14 1979-04-11 Optoelektronische fokusfehlerdetektionsvorrichtung.
JP4410379A JPS54140533A (en) 1978-04-14 1979-04-11 Focus error detector
DK151379A DK148969C (da) 1978-04-14 1979-04-11 Optisk-elektronisk arrangement til detektering af fokuseringsfejl
BR7902270A BR7902270A (pt) 1978-04-14 1979-04-11 Sistema de deteccao de erro de focalizacao opto-eletronico
PL1979214822A PL133015B1 (en) 1978-04-14 1979-04-11 Opto-electronic focusing error detection system
NZ190162A NZ190162A (en) 1978-04-14 1979-04-11 Opto-electronic focussing error detection arrangement
GB7912766A GB2020800B (en) 1978-04-14 1979-04-11 Optoelectronic focuserror detection
SE7903206A SE435980B (sv) 1978-04-14 1979-04-11 Opto-elektronisk fokuseringsfeldetekteringsanordning
BE0/194580A BE875546A (fr) 1978-04-14 1979-04-12 Systeme de detection de defauts de focalisation opto-electroniques
FR7909496A FR2423025A1 (fr) 1978-04-14 1979-04-13 Systeme de detection de defauts de focalisation opto-electronique
DD79212237A DD151097A5 (de) 1978-04-14 1979-04-16 Optoelektronisches fokusfehlerdetektionssystem
AT0287579A AT371268B (de) 1978-04-14 1979-04-17 Optoelektronisches fokusfehlerdetektionssystem

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7803969A NL7803969A (nl) 1978-04-14 1978-04-14 Opto-elektronisch fokusfout-detektiestelsel.

Publications (1)

Publication Number Publication Date
NL7803969A true NL7803969A (nl) 1979-10-16

Family

ID=19830653

Family Applications (1)

Application Number Title Priority Date Filing Date
NL7803969A NL7803969A (nl) 1978-04-14 1978-04-14 Opto-elektronisch fokusfout-detektiestelsel.

Country Status (21)

Country Link
US (1) US4233502A (nl)
JP (1) JPS54140533A (nl)
AR (1) AR218529A1 (nl)
AT (1) AT371268B (nl)
AU (1) AU523829B2 (nl)
BE (1) BE875546A (nl)
BR (1) BR7902270A (nl)
CA (1) CA1139878A (nl)
CH (1) CH640362A5 (nl)
DD (1) DD151097A5 (nl)
DE (1) DE2914122C2 (nl)
DK (1) DK148969C (nl)
ES (1) ES479542A1 (nl)
FR (1) FR2423025A1 (nl)
GB (1) GB2020800B (nl)
IT (1) IT1113877B (nl)
NL (1) NL7803969A (nl)
NZ (1) NZ190162A (nl)
PL (1) PL133015B1 (nl)
SE (1) SE435980B (nl)
ZA (1) ZA791298B (nl)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4546460A (en) * 1981-10-22 1985-10-08 Tokyo Shibaura Denki Kabushiki Kaisha Videodisc autofocus device

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS567248A (en) * 1979-07-02 1981-01-24 Hitachi Ltd Position detecting system
JPS5744236A (en) * 1980-08-29 1982-03-12 Matsushita Electric Ind Co Ltd Optical information reproducer
JPS57111837A (en) * 1980-12-27 1982-07-12 Olympus Optical Co Ltd Signal detecting system of optical information reader
JPS57195634U (nl) * 1981-06-05 1982-12-11
NL187374C (nl) * 1981-07-10 1991-09-02 Philips Nv Inrichting voor het detecteren van straling.
JPS5856236A (ja) * 1981-09-28 1983-04-02 Hitachi Ltd 光学的トラック位置検出装置およびそれを用いた光学的記録再生装置
NL8202058A (nl) * 1982-05-19 1983-12-16 Philips Nv Opto-elektronisch fokusfout-detektiestelsel.
JPS5971141A (ja) * 1982-10-14 1984-04-21 Mitsubishi Electric Corp 光学的信号読出し装置
JPS59121932A (ja) * 1982-12-28 1984-07-14 Fujitsu Ltd 自動焦点制御装置
JPS60170038A (ja) * 1984-02-14 1985-09-03 Sanyo Electric Co Ltd トラッキングサ−ボ装置
JPS60211644A (ja) * 1984-04-04 1985-10-24 Nec Corp 光学式位置検出方法及びその装置
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
DE3774765D1 (de) * 1986-06-04 1992-01-09 Philips Nv Optische messanordnung des abstands zwischen einer oberflaeche und einer bezugsebene.
JPH0231337A (ja) * 1988-07-21 1990-02-01 Mitsubishi Electric Corp 焦点誤差検出装置
JPH056881U (ja) * 1991-07-09 1993-01-29 株式会社ゼクセル 配線板の固定構造

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1299134B (de) * 1961-12-20 1969-07-10 Agfa Gevaert Ag Vorrichtung zur Scharfeinstellung und Qualitaetspruefung von Objektiven
DE2108837C3 (de) * 1971-02-25 1973-11-15 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Anordnung zur Abtastung von Signalen längs mindestens einer Spur
US4005260A (en) * 1972-11-11 1977-01-25 U.S. Philips Corporation Device for reading a disk-shaped record carrier with time base correction
NL7309839A (nl) * 1973-07-16 1975-01-20 Philips Nv Optische inrichting voor het detekteren van een afwijking in de fokussering van een afbeeldings- stelsel.
DE2500714C3 (de) * 1975-01-09 1979-07-05 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Einrichtung zur Kontrastmessung eines Bildes
NL177157C (nl) * 1975-02-28 1985-08-01 Philips Nv Inrichting voor het uitlezen van een vlakke registratiedrager met een optisch uitleesbare informatiestruktuur.
US4097730A (en) * 1975-07-02 1978-06-27 Zenith Radio Corporation Focus correction system for video disc player
US4047022A (en) * 1976-01-13 1977-09-06 Ernst Leitz Gmbh Auto focus with spatial filtering and pairwise interrogation of photoelectric diodes

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4546460A (en) * 1981-10-22 1985-10-08 Tokyo Shibaura Denki Kabushiki Kaisha Videodisc autofocus device

Also Published As

Publication number Publication date
DE2914122C2 (de) 1984-06-14
AU523829B2 (en) 1982-08-19
FR2423025A1 (fr) 1979-11-09
AT371268B (de) 1983-06-10
CA1139878A (en) 1983-01-18
DD151097A5 (de) 1981-09-30
IT1113877B (it) 1986-01-27
GB2020800A (en) 1979-11-21
JPS6349291B2 (nl) 1988-10-04
ES479542A1 (es) 1979-11-16
BE875546A (fr) 1979-10-12
DE2914122A1 (de) 1979-10-25
PL214822A1 (nl) 1980-05-05
FR2423025B1 (nl) 1984-06-29
JPS54140533A (en) 1979-10-31
PL133015B1 (en) 1985-04-30
ZA791298B (en) 1980-10-29
BR7902270A (pt) 1979-12-11
SE7903206L (sv) 1979-10-15
IT7921789A0 (it) 1979-04-11
GB2020800B (en) 1982-09-08
DK148969B (da) 1985-12-02
CH640362A5 (de) 1983-12-30
ATA287579A (de) 1982-10-15
SE435980B (sv) 1984-10-29
DK148969C (da) 1986-09-22
DK151379A (da) 1979-10-15
AU4598779A (en) 1979-10-18
NZ190162A (en) 1982-05-25
AR218529A1 (es) 1980-06-13
US4233502A (en) 1980-11-11

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Legal Events

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A1B A search report has been drawn up
BV The patent application has lapsed