FR2325953A1 - Senseur optique de focalisation et dispositif de focalisation comportant un tel senseur - Google Patents

Senseur optique de focalisation et dispositif de focalisation comportant un tel senseur

Info

Publication number
FR2325953A1
FR2325953A1 FR7529705A FR7529705A FR2325953A1 FR 2325953 A1 FR2325953 A1 FR 2325953A1 FR 7529705 A FR7529705 A FR 7529705A FR 7529705 A FR7529705 A FR 7529705A FR 2325953 A1 FR2325953 A1 FR 2325953A1
Authority
FR
France
Prior art keywords
sensor
focusing
device including
optical
focusing device
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
FR7529705A
Other languages
English (en)
Other versions
FR2325953B1 (fr
Inventor
Jean-Claude Lehureau
Claude Bricot
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.)
Thomson-Brandt SA
Original Assignee
Thomson-Brandt SA
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 Thomson-Brandt SA filed Critical Thomson-Brandt SA
Priority to FR7529705A priority Critical patent/FR2325953A1/fr
Priority to US05/726,473 priority patent/US4079248A/en
Priority to CA262,090A priority patent/CA1073253A/fr
Priority to GB40082/76A priority patent/GB1553440A/en
Priority to DE2643975A priority patent/DE2643975C2/de
Priority to JP51117059A priority patent/JPS5242742A/ja
Publication of FR2325953A1 publication Critical patent/FR2325953A1/fr
Application granted granted Critical
Publication of FR2325953B1 publication Critical patent/FR2325953B1/fr
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/10—Beam splitting or combining systems
    • G02B27/16—Beam splitting or combining systems used as aids for focusing
    • 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
    • G02B7/34—Systems for automatic generation of focusing signals using different areas in a pupil plane
    • 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
    • G11B7/08—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
FR7529705A 1975-09-29 1975-09-29 Senseur optique de focalisation et dispositif de focalisation comportant un tel senseur Granted FR2325953A1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
FR7529705A FR2325953A1 (fr) 1975-09-29 1975-09-29 Senseur optique de focalisation et dispositif de focalisation comportant un tel senseur
US05/726,473 US4079248A (en) 1975-09-29 1976-09-24 Optical focussing sensor
CA262,090A CA1073253A (fr) 1975-09-29 1976-09-27 Mesureur de focalisation optique
GB40082/76A GB1553440A (en) 1975-09-29 1976-09-27 Optical focussing sensor
DE2643975A DE2643975C2 (de) 1975-09-29 1976-09-29 Anordnung zur punktförmigen Beleuchtung der reflektierenden Oberfläche eines Trägers
JP51117059A JPS5242742A (en) 1975-09-29 1976-09-29 Optically focusing sensor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7529705A FR2325953A1 (fr) 1975-09-29 1975-09-29 Senseur optique de focalisation et dispositif de focalisation comportant un tel senseur

Publications (2)

Publication Number Publication Date
FR2325953A1 true FR2325953A1 (fr) 1977-04-22
FR2325953B1 FR2325953B1 (fr) 1978-03-17

Family

ID=9160559

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7529705A Granted FR2325953A1 (fr) 1975-09-29 1975-09-29 Senseur optique de focalisation et dispositif de focalisation comportant un tel senseur

Country Status (6)

Country Link
US (1) US4079248A (fr)
JP (1) JPS5242742A (fr)
CA (1) CA1073253A (fr)
DE (1) DE2643975C2 (fr)
FR (1) FR2325953A1 (fr)
GB (1) GB1553440A (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0023868A1 (fr) * 1979-08-03 1981-02-11 Thomson-Csf Dispositif optique d'accès à une piste portée par un support d'information et système de mémoire optique comportant un tel dispositif
US4399529A (en) * 1980-05-28 1983-08-16 Thomson-Csf Optical device for recording and reading on a data carrier
FR2541001A1 (fr) * 1983-02-15 1984-08-17 Gen Electric Projecteur optique pour determiner une position et procede de determination

Families Citing this family (47)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5744236A (en) * 1980-08-29 1982-03-12 Matsushita Electric Ind Co Ltd Optical information reproducer
JPS57108811A (en) * 1980-12-26 1982-07-07 Hitachi Ltd Optical focus position detector
DE3280232D1 (de) * 1981-06-22 1990-09-27 Toshiba Kawasaki Kk Optischer kopf.
US4521680A (en) * 1981-07-20 1985-06-04 Tokyo Shibaura Denki Kabushiki Kaisha System for focusing a light beam on a light reflecting surface
DE3280137D1 (de) * 1981-09-17 1990-04-19 Toshiba Kawasaki Kk Ein optischer kopf.
JPS5870434A (ja) * 1981-10-22 1983-04-26 Toshiba Corp 光学ヘツド
US4441175A (en) * 1982-01-25 1984-04-03 Magnetic Peripherals Inc. Partial beam focus sensing in an optical recording system
DE3204876C2 (de) * 1982-02-12 1986-10-16 Helmut Dr.rer.nat. 8000 München Krueger Vorrichtung zur Bestimmung des Refraktionszustandes des menschlichen Auges
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
JPS6010425A (ja) * 1983-06-30 1985-01-19 Toshiba Corp 光学ヘツド
NL8402943A (nl) * 1983-09-29 1985-04-16 Toshiba Kk Optische kop.
DE3484678D1 (de) * 1983-11-22 1991-07-11 Toshiba Kawasaki Kk Optischer kopf.
JPS60145764A (ja) * 1984-01-10 1985-08-01 Dainippon Screen Mfg Co Ltd 画像走査記録方法
US4684797A (en) * 1984-02-29 1987-08-04 Kabushiki Kaisha Toshiba Optical system and method for reducing vibration of an objective lens in an optical head assembly of an optical read/write system
JPS60197950A (ja) * 1984-03-22 1985-10-07 Toshiba Corp 光学ヘツド
JPS60253027A (ja) * 1984-05-29 1985-12-13 Canon Inc 光学的情報処理装置
JPH069090B2 (ja) * 1984-06-12 1994-02-02 株式会社東芝 光学ヘツド
EP0225564A3 (en) * 1985-11-30 1988-07-06 Kabushiki Kaisha Toshiba Optical head
EP0224853B1 (fr) * 1985-11-30 1992-02-05 Kabushiki Kaisha Toshiba Tête optique
JPH0332054Y2 (fr) * 1986-08-23 1991-07-08
US5231621A (en) * 1986-09-05 1993-07-27 Canon Kabushiki Kaisha Focus detector which serves to split off a portion of a detected light beam only when the detected light beam is not refocused at an expected refocus point
JPH0734264B2 (ja) * 1986-09-05 1995-04-12 キヤノン株式会社 光学式情報記録再生装置
JPS63163313A (ja) * 1986-12-25 1988-07-06 Mitaka Koki Kk 非接触自動焦点位置合わせ装置
FR2620537B1 (fr) * 1987-09-14 1991-07-26 Micro Controle Dispositif optique a mise au point automatique et appareil optique comportant un tel dispositif
US5036185A (en) * 1988-12-27 1991-07-30 Kabushiki Kaisha Toshiba Optical apparatus for detecting a focusing state
US5281797A (en) * 1991-12-26 1994-01-25 Hitachi, Ltd. Short wavelength optical disk head having a changeable aperture
US5453962A (en) * 1992-08-20 1995-09-26 Mitsubishi Denki Kabushiki Kaisha Focus error detecting device
US5353272A (en) * 1992-12-29 1994-10-04 Eastman Kodak Company Apparatus and method for a modified half-aperture focus/tracking/data sensor system
US5406541A (en) * 1992-12-29 1995-04-11 Eastman Kodak Company Apparatus and method for a dual half-aperture focus sensor system
US5360970A (en) * 1992-12-29 1994-11-01 Eastman Kodak Company Apparatus and method for a single return path signal sensor system
JP3019181B2 (ja) * 1993-12-27 2000-03-13 日本電気株式会社 光ヘッドのサーボ信号検出装置
JP3368091B2 (ja) * 1994-04-22 2003-01-20 キヤノン株式会社 投影露光装置及びデバイスの製造方法
FR2723243B1 (fr) * 1994-07-26 1996-09-06 Thomson Csf Dispositif d'enregistrement et/ou de lecture de tetes magnetiques et son procede de realisation
FR2739965B1 (fr) * 1995-10-17 1997-11-07 Thomson Csf Dispositif emetteur-recepteur de lumiere et systeme de lecture optique
FR2786345B1 (fr) 1998-11-24 2001-02-09 Thomson Csf Dispositif de cryptage quantique
US7149173B2 (en) * 2000-10-17 2006-12-12 Thales Medium for recording optically readable data, method for making same and optical system reproducing said data
FR2824905B1 (fr) * 2001-05-15 2003-08-29 Thomson Csf Gyrometre a fibre optique
JP3809803B2 (ja) * 2002-02-15 2006-08-16 オムロン株式会社 変位センサ
DE10234756B3 (de) * 2002-07-30 2004-02-12 Leica Microsystems Semiconductor Gmbh Autofokusmodul für mikroskopbasierte Systeme
FI20031143A0 (fi) * 2003-08-08 2003-08-08 Wallac Oy Optinen fokusointimenetelmä ja -järjestely
AU2010222633B2 (en) 2009-03-11 2015-05-14 Sakura Finetek Usa, Inc. Autofocus method and autofocus device
US10139613B2 (en) 2010-08-20 2018-11-27 Sakura Finetek U.S.A., Inc. Digital microscope and method of sensing an image of a tissue sample
DE102013103971A1 (de) 2013-04-19 2014-11-06 Sensovation Ag Verfahren zum Erzeugen eines aus mehreren Teilbildern zusammengesetzten Gesamtbilds eines Objekts
US10007102B2 (en) 2013-12-23 2018-06-26 Sakura Finetek U.S.A., Inc. Microscope with slide clamping assembly
US10126540B2 (en) 2015-12-09 2018-11-13 Quality Vision International, Inc. Focusing system for a telecentric optical measuring machine
US11280803B2 (en) 2016-11-22 2022-03-22 Sakura Finetek U.S.A., Inc. Slide management system
JP7141857B2 (ja) * 2018-05-31 2022-09-26 川崎重工業株式会社 ロボットシステム、及びロボットシステムの制御方法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2122590A1 (fr) * 1971-01-22 1972-09-01 Leitz Ernst Gmbh

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3418477A (en) * 1966-09-28 1968-12-24 Sylvania Electric Prod Apparatus for determining the focal point of a light beam
AR205243A1 (es) * 1972-05-11 1976-04-21 Philips Nv Aparato para la lectura de un portador de grabacion reflector plano
FR2222666B1 (fr) * 1973-03-19 1976-11-05 Thomson Brandt
NL7402504A (nl) * 1974-02-25 1975-08-27 Philips Nv Inrichting voor het langs optische weg uitlezen van een registratiedrager.
US3904870A (en) * 1973-10-09 1975-09-09 Honeywell Inc Focus detecting apparatus

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2122590A1 (fr) * 1971-01-22 1972-09-01 Leitz Ernst Gmbh

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0023868A1 (fr) * 1979-08-03 1981-02-11 Thomson-Csf Dispositif optique d'accès à une piste portée par un support d'information et système de mémoire optique comportant un tel dispositif
US4399529A (en) * 1980-05-28 1983-08-16 Thomson-Csf Optical device for recording and reading on a data carrier
FR2541001A1 (fr) * 1983-02-15 1984-08-17 Gen Electric Projecteur optique pour determiner une position et procede de determination

Also Published As

Publication number Publication date
DE2643975C2 (de) 1983-07-07
FR2325953B1 (fr) 1978-03-17
GB1553440A (en) 1979-09-26
JPS5242742A (en) 1977-04-02
CA1073253A (fr) 1980-03-11
JPS6218973B2 (fr) 1987-04-25
DE2643975A1 (de) 1977-04-07
US4079248A (en) 1978-03-14

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