FR2449293A1 - DEVICE FOR DETECTING THE FOCUSING OF A CAMERA - Google Patents

DEVICE FOR DETECTING THE FOCUSING OF A CAMERA

Info

Publication number
FR2449293A1
FR2449293A1 FR8003066A FR8003066A FR2449293A1 FR 2449293 A1 FR2449293 A1 FR 2449293A1 FR 8003066 A FR8003066 A FR 8003066A FR 8003066 A FR8003066 A FR 8003066A FR 2449293 A1 FR2449293 A1 FR 2449293A1
Authority
FR
France
Prior art keywords
camera
lens
focusing
detecting
plans
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
FR8003066A
Other languages
French (fr)
Other versions
FR2449293B1 (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.)
Pentax Corp
Original Assignee
Asahi Kogaku Kogyo Co Ltd
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 JP1525779A external-priority patent/JPS55108631A/en
Priority claimed from JP1525679A external-priority patent/JPS55108630A/en
Priority claimed from JP1525579A external-priority patent/JPS55108629A/en
Priority claimed from JP1694879A external-priority patent/JPS55110228A/en
Application filed by Asahi Kogaku Kogyo Co Ltd filed Critical Asahi Kogaku Kogyo Co Ltd
Publication of FR2449293A1 publication Critical patent/FR2449293A1/en
Application granted granted Critical
Publication of FR2449293B1 publication Critical patent/FR2449293B1/fr
Granted legal-status Critical Current

Links

Classifications

    • 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
    • G02B7/36—Systems for automatic generation of focusing signals using image sharpness techniques, e.g. image processing techniques for generating autofocus signals
    • G02B7/38—Systems for automatic generation of focusing signals using image sharpness techniques, e.g. image processing techniques for generating autofocus signals measured at different points on the optical axis, e.g. focussing on two or more planes and comparing image data
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B2217/00—Details of cameras or camera bodies; Accessories therefor
    • G03B2217/005—Blur detection

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Automatic Focus Adjustment (AREA)
  • Focusing (AREA)

Abstract

L'INVENTION CONCERNE UN DISPOSITIF POUR DETECTER LA MISE AU POINT D'UN APPAREIL PHOTOGRAPHIQUE OU D'UNE CAMERA. LE DISPOSITIF EST CARACTERISE EN CE QU'IL COMPREND DEUX GROUPES D'ELEMENTS PHOTOSENSIBLES 3, 5 SITUES DANS DEUX PLANS PARALLELES A L'AXE OPTIQUE DE L'OBJECTIF 2, L'UN AU MOINS DE CES PLANS ETANT SITUE D'UN COTE DU PLAN 4 DE LA SURFACE DU FILM; LE DISPOSITIF COMPREND AUSSI DES MOYENS D'ANALYSE ET DE TRAITEMENT DES SIGNAUX DE SORTIE DES ELEMENTS PHOTOSENSIBLES, POUR CORRIGER LA POSITION DE L'OBJECTIF 2. APPLICATION A LA CORRECTION AUTOMATIQUE DE LA FOCALISATION DE L'OBJECTIF D'UNE CAMERA OU D'UN APPAREIL PHOTOGRAPHIQUE.THE INVENTION RELATES TO A DEVICE FOR DETECTING THE FOCUS OF A PHOTOGRAPHIC APPARATUS OR A CAMERA. THE DEVICE IS CHARACTERIZED IN THAT IT INCLUDES TWO GROUPS OF PHOTOSENSITIVE ELEMENTS 3, 5 LOCATED IN TWO PLANS PARALLEL TO THE OPTICAL AXIS OF OBJECTIVE 2, AT LEAST ONE OF THESE PLANS BEING LOCATED ON A SIDE OF THE FILM SURFACE SHOT 4; THE DEVICE ALSO INCLUDES MEANS OF ANALYSIS AND PROCESSING OF THE EXIT SIGNALS OF THE PHOTOSENSITIVE ELEMENTS, TO CORRECT THE POSITION OF THE LENS 2. APPLICATION TO THE AUTOMATIC CORRECTION OF THE FOCUSING OF THE LENS OF A CAMERA OR A LENS. CAMERA.

FR8003066A 1979-02-13 1980-02-12 DEVICE FOR DETECTING THE FOCUSING OF A CAMERA Granted FR2449293A1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP1525779A JPS55108631A (en) 1979-02-13 1979-02-13 Focus detector of camera
JP1525679A JPS55108630A (en) 1979-02-13 1979-02-13 Focus detector of camera
JP1525579A JPS55108629A (en) 1979-02-13 1979-02-13 Focus detector of camera
JP1694879A JPS55110228A (en) 1979-02-16 1979-02-16 Focus detector of camera

Publications (2)

Publication Number Publication Date
FR2449293A1 true FR2449293A1 (en) 1980-09-12
FR2449293B1 FR2449293B1 (en) 1984-11-30

Family

ID=27456351

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8003066A Granted FR2449293A1 (en) 1979-02-13 1980-02-12 DEVICE FOR DETECTING THE FOCUSING OF A CAMERA

Country Status (3)

Country Link
DE (1) DE3005044C2 (en)
FR (1) FR2449293A1 (en)
GB (1) GB2047037B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2512561A1 (en) * 1981-09-10 1983-03-11 Asahi Optical Co Ltd METHOD FOR DETECTING FOCUS

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3049233C2 (en) * 1979-12-27 1988-01-21 Asahi Kogaku Kogyo K.K., Tokyo Photographic camera with automatic focus
DE3142133A1 (en) * 1980-10-23 1982-05-27 Ricoh Co., Ltd., Tokyo Automatic focusing system
GB2195214B (en) * 1980-12-10 1988-10-26 Emi Ltd Automatic focussing system for an optical system
DE3103154A1 (en) * 1981-01-30 1982-08-26 Siemens AG, 1000 Berlin und 8000 München CIRCUIT ARRANGEMENT FOR BINARY CODING OF THE SENSOR SIGNALS OF A MULTIPLE NUMBER OF OPTOELECTRONIC SENSOR ELEMENTS AND METHOD FOR THEIR OPERATION
US4432620A (en) * 1981-03-13 1984-02-21 Ricoh Co., Ltd. Lens motor drive device in automatic focusing camera
US4432622A (en) * 1981-06-16 1984-02-21 Ricoh Company, Ltd. Focusing-position-detection circuit
AU554186B2 (en) * 1981-10-26 1986-08-14 Sony Corporation Apparatus for detecting distance to an object
US4498754A (en) 1982-01-25 1985-02-12 Ricoh Company, Ltd. Single lens reflex camera
JPS58153327A (en) * 1982-03-08 1983-09-12 Toshiba Corp Inspecting device for pattern
JPS58211721A (en) * 1982-06-04 1983-12-09 Olympus Optical Co Ltd Focusing detecting method
GB2129642B (en) * 1982-11-05 1986-09-10 British Library Board Focus detection
JP2002287017A (en) * 2001-03-28 2002-10-03 Fuji Photo Optical Co Ltd Focusing state detecting device for photographic lens

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2396325A1 (en) * 1977-07-01 1979-01-26 Olympus Optical Co Automatic focussing system for an optical instrument - assesses smoothness of brightness change between scanned adjacent image elements to produce control signal for optical system

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5379531A (en) * 1976-12-24 1978-07-14 Nippon Chemical Ind Matched focal point detection device
FR2386832A1 (en) * 1977-04-05 1978-11-03 Commissariat Energie Atomique AUTOMATIC CORRECTION PROCEDURE FOR FOCUSING A MICROSCOPE AND A DEVICE IMPLEMENTING THIS PROCEDURE
JPS53166637U (en) * 1977-06-02 1978-12-27
DE2836428A1 (en) * 1978-08-19 1980-03-06 Battelle Institut E V Automatic focussing system with light-sensitive CCD elements - compares illumination differences to form difference signal for controlling motor assigned to lens

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2396325A1 (en) * 1977-07-01 1979-01-26 Olympus Optical Co Automatic focussing system for an optical instrument - assesses smoothness of brightness change between scanned adjacent image elements to produce control signal for optical system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2512561A1 (en) * 1981-09-10 1983-03-11 Asahi Optical Co Ltd METHOD FOR DETECTING FOCUS

Also Published As

Publication number Publication date
GB2047037A (en) 1980-11-19
DE3005044A1 (en) 1980-08-14
GB2047037B (en) 1983-11-23
FR2449293B1 (en) 1984-11-30
DE3005044C2 (en) 1984-09-20

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Legal Events

Date Code Title Description
DL Decision of the director general to leave to make available licences of right
ST Notification of lapse