NL8003729A - Inrichting voor optische scherpstelling. - Google Patents

Inrichting voor optische scherpstelling. Download PDF

Info

Publication number
NL8003729A
NL8003729A NL8003729A NL8003729A NL8003729A NL 8003729 A NL8003729 A NL 8003729A NL 8003729 A NL8003729 A NL 8003729A NL 8003729 A NL8003729 A NL 8003729A NL 8003729 A NL8003729 A NL 8003729A
Authority
NL
Netherlands
Prior art keywords
focusing
radiation
radiation source
control means
control
Prior art date
Application number
NL8003729A
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 NL8003729A priority Critical patent/NL8003729A/nl
Priority to US06/207,117 priority patent/US4354103A/en
Priority to DE19813124219 priority patent/DE3124219A1/de
Priority to GB8119416A priority patent/GB2078947B/en
Priority to JP9680881A priority patent/JPS5730810A/ja
Priority to AU72111/81A priority patent/AU540312B2/en
Priority to AT0280181A priority patent/AT371277B/de
Priority to IT22545/81A priority patent/IT1137923B/it
Priority to CA000380561A priority patent/CA1160874A/en
Priority to ES503348A priority patent/ES503348A0/es
Priority to FR8112672A priority patent/FR2485781A1/fr
Publication of NL8003729A publication Critical patent/NL8003729A/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
    • 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)
NL8003729A 1980-06-27 1980-06-27 Inrichting voor optische scherpstelling. NL8003729A (nl)

Priority Applications (11)

Application Number Priority Date Filing Date Title
NL8003729A NL8003729A (nl) 1980-06-27 1980-06-27 Inrichting voor optische scherpstelling.
US06/207,117 US4354103A (en) 1980-06-27 1980-11-17 Optical focusing device with two controls
DE19813124219 DE3124219A1 (de) 1980-06-27 1981-06-20 "vorrichtung zur optischen scharfeinstellung"
GB8119416A GB2078947B (en) 1980-06-27 1981-06-24 Optical focusing device
JP9680881A JPS5730810A (en) 1980-06-27 1981-06-24 Optical focusing device
AU72111/81A AU540312B2 (en) 1980-06-27 1981-06-24 Optical focusing device
AT0280181A AT371277B (de) 1980-06-27 1981-06-24 Vorrichtung zur optischen scharfeinstellung
IT22545/81A IT1137923B (it) 1980-06-27 1981-06-24 Dispositivo ottico di focalizzazione
CA000380561A CA1160874A (en) 1980-06-27 1981-06-25 Optical focusing device
ES503348A ES503348A0 (es) 1980-06-27 1981-06-25 Un dispositivo de enfoque optico
FR8112672A FR2485781A1 (fr) 1980-06-27 1981-06-26 Dispositif de mise au point optique

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL8003729A NL8003729A (nl) 1980-06-27 1980-06-27 Inrichting voor optische scherpstelling.
NL8003729 1980-06-27

Publications (1)

Publication Number Publication Date
NL8003729A true NL8003729A (nl) 1982-01-18

Family

ID=19835527

Family Applications (1)

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

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) ES503348A0 (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
US4580900A (en) * 1982-04-02 1986-04-08 Eaton Corporation Auto focus alignment and measurement system and method
US4615621A (en) * 1982-04-02 1986-10-07 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 (fr) * 1983-07-06 1985-01-31 Matsushita Electric Industrial Co., Ltd. Photo-capteur
EP0236503B1 (en) * 1985-09-10 1992-01-22 Mitsubishi Denki Kabushiki Kaisha Optical head device
US4712887A (en) * 1985-12-20 1987-12-15 Dazar Corporation Optical system for fast access optical data storage device
EP0346479B1 (en) * 1987-10-28 1994-01-05 Oki Electric Industry Company, Limited 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
GB2078947A (en) 1982-01-13
CA1160874A (en) 1984-01-24
AU540312B2 (en) 1984-11-08
AT371277B (de) 1983-06-10
US4354103A (en) 1982-10-12
JPS5730810A (en) 1982-02-19
IT1137923B (it) 1986-09-10
AU7211181A (en) 1982-01-07
FR2485781A1 (fr) 1981-12-31
DE3124219A1 (de) 1982-02-04
IT8122545A0 (it) 1981-06-24
ES8204868A1 (es) 1982-05-01
GB2078947B (en) 1984-05-16
ES503348A0 (es) 1982-05-01
ATA280181A (de) 1982-10-15

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Legal Events

Date Code Title Description
A1B A search report has been drawn up
BV The patent application has lapsed