NL8004969A - Inrichting voor optische scherpstelling. - Google Patents

Inrichting voor optische scherpstelling. Download PDF

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Publication number
NL8004969A
NL8004969A NL8004969A NL8004969A NL8004969A NL 8004969 A NL8004969 A NL 8004969A NL 8004969 A NL8004969 A NL 8004969A NL 8004969 A NL8004969 A NL 8004969A NL 8004969 A NL8004969 A NL 8004969A
Authority
NL
Netherlands
Prior art keywords
focusing
signal
control
radiation
deviation
Prior art date
Application number
NL8004969A
Other languages
English (en)
Dutch (nl)
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 NL8004969A priority Critical patent/NL8004969A/nl
Priority to US06/205,554 priority patent/US4374324A/en
Priority to FR8116311A priority patent/FR2495338B1/fr
Priority to CA000384733A priority patent/CA1183259A/en
Priority to IT23681/81A priority patent/IT1138528B/it
Priority to AU74703/81A priority patent/AU7470381A/en
Priority to GB8126355A priority patent/GB2083252B/en
Priority to DE3134077A priority patent/DE3134077A1/de
Priority to ES505077A priority patent/ES8206864A1/es
Priority to JP56136938A priority patent/JPS5776507A/ja
Priority to AT0376781A priority patent/AT371623B/de
Publication of NL8004969A publication Critical patent/NL8004969A/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
    • G11B7/08—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
    • G11B7/095—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 specially adapted for discs, e.g. for compensation of eccentricity or wobble
    • G11B7/0956—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 specially adapted for discs, e.g. for compensation of eccentricity or wobble to compensate for tilt, skew, warp or inclination of the disc, i.e. maintain the optical axis at right angles to the disc
    • 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

  • Automatic Focus Adjustment (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
NL8004969A 1980-09-02 1980-09-02 Inrichting voor optische scherpstelling. NL8004969A (nl)

Priority Applications (11)

Application Number Priority Date Filing Date Title
NL8004969A NL8004969A (nl) 1980-09-02 1980-09-02 Inrichting voor optische scherpstelling.
US06/205,554 US4374324A (en) 1980-09-02 1980-11-10 Optical focussing device with inclination detection
FR8116311A FR2495338B1 (fr) 1980-09-02 1981-08-26 Dispositif pour la focalisation optique precise du rayonnement d'une source sur un objet
CA000384733A CA1183259A (en) 1980-09-02 1981-08-27 Optical focussing device
IT23681/81A IT1138528B (it) 1980-09-02 1981-08-28 Dispositivo di focalizzazione ottica
AU74703/81A AU7470381A (en) 1980-09-02 1981-08-28 Optical focussing device
GB8126355A GB2083252B (en) 1980-09-02 1981-08-28 Optical focussing device
DE3134077A DE3134077A1 (de) 1980-09-02 1981-08-28 "vorrichtung zur optischen scharfeinstellung"
ES505077A ES8206864A1 (es) 1980-09-02 1981-08-31 Un dispositivo enfocador optico
JP56136938A JPS5776507A (en) 1980-09-02 1981-08-31 Optical focusing device
AT0376781A AT371623B (de) 1980-09-02 1981-08-31 Vorrichtung zur optischen scharfeinstellung

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL8004969A NL8004969A (nl) 1980-09-02 1980-09-02 Inrichting voor optische scherpstelling.
NL8004969 1980-09-02

Publications (1)

Publication Number Publication Date
NL8004969A true NL8004969A (nl) 1982-04-01

Family

ID=19835809

Family Applications (1)

Application Number Title Priority Date Filing Date
NL8004969A NL8004969A (nl) 1980-09-02 1980-09-02 Inrichting voor optische scherpstelling.

Country Status (11)

Country Link
US (1) US4374324A (de)
JP (1) JPS5776507A (de)
AT (1) AT371623B (de)
AU (1) AU7470381A (de)
CA (1) CA1183259A (de)
DE (1) DE3134077A1 (de)
ES (1) ES8206864A1 (de)
FR (1) FR2495338B1 (de)
GB (1) GB2083252B (de)
IT (1) IT1138528B (de)
NL (1) NL8004969A (de)

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57161813A (en) * 1981-03-31 1982-10-05 Olympus Optical Co Ltd Optical head driver
NL8103305A (nl) * 1981-07-10 1983-02-01 Philips Nv Opto-elektronische inrichting voor het met een stralingsbundel inschrijven en/of uitlezen van registratiesporen.
NL8105072A (nl) * 1981-11-10 1983-06-01 Philips Nv Electro-optische inrichting.
JPS58207630A (ja) * 1982-05-28 1983-12-03 Hitachi Ltd 一定間隔維持装置
JPS609018U (ja) * 1983-06-24 1985-01-22 パイオニア株式会社 光学式記録情報読取装置
AU575332B2 (en) * 1983-07-29 1988-07-28 Sony Corporation Optical disk pick-up
US4590594A (en) * 1983-11-23 1986-05-20 Rca Corporation Side-spot focus apparatus for optical disc recording and/or playback system
JPS60143448A (ja) * 1983-12-29 1985-07-29 Sony Corp スキユ−エラ−検出回路
GB2156069B (en) * 1984-02-03 1987-05-07 Pioneer Electronic Corp Apparatus for reproducing recorded information
US5033856A (en) * 1984-07-05 1991-07-23 Canon Kabushiki Kaisha Three-dimensional shape measuring apparatus
US4742506A (en) * 1984-07-12 1988-05-03 Sony Corporation Tracking error detecting apparatus for an optical head with skew error reduction by using an inclined header portion
US4773052A (en) * 1984-09-20 1988-09-20 Pioneer Electronic Corporation Dual mode disk player/recorder
JPH0619244B2 (ja) * 1985-09-30 1994-03-16 横河電機株式会社 変位変換器
US4712887A (en) * 1985-12-20 1987-12-15 Dazar Corporation Optical system for fast access optical data storage device
US4956833A (en) * 1986-03-31 1990-09-11 Asahi Kogaku Kogyo Kabushiki Kaisha Objective driving device for an optical disk apparatus
JPS62271235A (ja) * 1986-05-20 1987-11-25 Matsushita Electric Ind Co Ltd 光学記録再生装置
DE68923833T2 (de) * 1988-06-20 1996-06-13 Mitsubishi Electric Corp Optischer Kopf mit Kippkorrekturservomechanismus.
JPH0769162B2 (ja) * 1990-04-23 1995-07-26 大日本スクリーン製造株式会社 光学的検査システムのための自動焦点合わせ装置
DE4025577C2 (de) * 1990-08-11 1999-09-09 Fraunhofer Ges Forschung Vorrichtung zum berührungslosen Messen des Abstands von einem Objekt
WO1992006359A1 (en) * 1990-10-09 1992-04-16 Metronics, Inc. Laser autofocus apparatus and method
JP2009158007A (ja) 2007-12-26 2009-07-16 Sony Corp 光学ピックアップ装置、光記録再生装置及びギャップ制御方法
DE102017131224A1 (de) 2017-12-22 2019-06-27 Precitec Gmbh & Co. Kg Verfahren und Vorrichtung zur Erfassung einer Fokuslage eines Laserstrahls

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3932700A (en) * 1974-02-04 1976-01-13 Zenith Radio Corporation Focus tracking registration for optical reproducing systems
FR2309888A1 (fr) * 1975-04-30 1976-11-26 Thomson Brandt Dispositif optique de projection et lecteur optique comportant un tel dispositif
NL7703123A (nl) * 1977-03-23 1978-09-26 Philips Nv Inrichting voor het uitlezen van een optische stralingsreflekterende registratiedrager.
NL186121C (nl) * 1977-12-16 1990-09-17 Mitsubishi Electric Corp Automatisch focusseerapparaat.
JPS54160212A (en) * 1978-06-09 1979-12-18 Hitachi Ltd Optical head for information processing
JPS55927A (en) * 1978-06-16 1980-01-07 Pioneer Video Corp Focus servo unit of optical information reader
JPS5545122A (en) * 1978-09-25 1980-03-29 Mansei Kogyo Kk Focus controller of optical reader

Also Published As

Publication number Publication date
GB2083252B (en) 1984-02-01
FR2495338A1 (fr) 1982-06-04
AT371623B (de) 1983-07-11
JPH0147762B2 (de) 1989-10-16
JPS5776507A (en) 1982-05-13
ES505077A0 (es) 1982-08-16
DE3134077C2 (de) 1990-03-08
CA1183259A (en) 1985-02-26
AU7470381A (en) 1982-03-11
FR2495338B1 (fr) 1986-05-09
DE3134077A1 (de) 1982-04-15
US4374324A (en) 1983-02-15
IT1138528B (it) 1986-09-17
ES8206864A1 (es) 1982-08-16
ATA376781A (de) 1982-11-15
IT8123681A0 (it) 1981-08-28
GB2083252A (en) 1982-03-17

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