FR2448732B1 - - Google Patents

Info

Publication number
FR2448732B1
FR2448732B1 FR8002789A FR8002789A FR2448732B1 FR 2448732 B1 FR2448732 B1 FR 2448732B1 FR 8002789 A FR8002789 A FR 8002789A FR 8002789 A FR8002789 A FR 8002789A FR 2448732 B1 FR2448732 B1 FR 2448732B1
Authority
FR
France
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.)
Expired
Application number
FR8002789A
Other languages
French (fr)
Other versions
FR2448732A1 (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.)
Asahi Kasei Corp
Asahi Chemical Industry Co Ltd
Original Assignee
Asahi Chemical Industry Co Ltd
Asahi Kasei Kogyo KK
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 JP1404279A external-priority patent/JPS55108627A/en
Priority claimed from JP1525479A external-priority patent/JPS55108628A/en
Application filed by Asahi Chemical Industry Co Ltd, Asahi Kasei Kogyo KK filed Critical Asahi Chemical Industry Co Ltd
Publication of FR2448732A1 publication Critical patent/FR2448732A1/en
Application granted granted Critical
Publication of FR2448732B1 publication Critical patent/FR2448732B1/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

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)
FR8002789A 1979-02-09 1980-02-08 FOCUSING DETECTION DEVICE FOR A CAMERA Granted FR2448732A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP1404279A JPS55108627A (en) 1979-02-09 1979-02-09 Focus detector of camera
JP1525479A JPS55108628A (en) 1979-02-13 1979-02-13 Focus detector of camera

Publications (2)

Publication Number Publication Date
FR2448732A1 FR2448732A1 (en) 1980-09-05
FR2448732B1 true FR2448732B1 (en) 1984-03-30

Family

ID=26349933

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8002789A Granted FR2448732A1 (en) 1979-02-09 1980-02-08 FOCUSING DETECTION DEVICE FOR A CAMERA

Country Status (3)

Country Link
DE (2) DE3004147C2 (en)
FR (1) FR2448732A1 (en)
GB (1) GB2047036B (en)

Families Citing this family (7)

* 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
DE3131053C2 (en) * 1980-08-07 1983-12-29 Asahi Kogaku Kogyo K.K., Tokyo Automatic focusing detection device for a camera
US4384210A (en) * 1981-02-06 1983-05-17 Honeywell Inc. Spatial low pass filter for range finding systems
JPS5882211A (en) * 1981-11-12 1983-05-17 Asahi Optical Co Ltd Auto-focusing device
US4804831A (en) * 1985-10-30 1989-02-14 Canon Kabushiki Kaisha Focus detecting apparatus independent of object image contrast
GB2209446B (en) * 1987-09-02 1992-09-30 Canon Kk Automatic focusing device
DE3844874C2 (en) * 1987-09-02 1995-03-09 Canon Kk Automatic focusing device

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1173327B (en) * 1961-04-10 1964-07-02 Logetronics Inc Arrangement for detecting and automatically adjusting the focus in a photographic device
US3967056A (en) * 1973-02-26 1976-06-29 Minolta Camera Kabushiki Kaisha Automatic focusing apparatus
DE2406045C2 (en) * 1974-02-08 1983-03-17 Canon Inc., Tokyo Arrangement consisting of at least two photoelectric conversion elements
JPS5315131A (en) * 1976-07-27 1978-02-10 Canon Inc Detecting method for sharpness of objective image
DE2821722C2 (en) * 1978-05-18 1981-09-17 Siemens AG, 1000 Berlin und 8000 München Device for automatic or semi-automatic focusing of the image of an object on an image plane

Also Published As

Publication number Publication date
FR2448732A1 (en) 1980-09-05
GB2047036B (en) 1983-02-16
GB2047036A (en) 1980-11-19
DE3050691C2 (en) 1984-09-27
DE3004147A1 (en) 1980-08-14
DE3004147C2 (en) 1983-06-23

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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