JPS5734509A - Automatic focusing detector of camera - Google Patents

Automatic focusing detector of camera

Info

Publication number
JPS5734509A
JPS5734509A JP10861180A JP10861180A JPS5734509A JP S5734509 A JPS5734509 A JP S5734509A JP 10861180 A JP10861180 A JP 10861180A JP 10861180 A JP10861180 A JP 10861180A JP S5734509 A JPS5734509 A JP S5734509A
Authority
JP
Japan
Prior art keywords
threshold value
contrast
absolute value
circuit
photoelectric elements
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
JP10861180A
Other languages
English (en)
Japanese (ja)
Other versions
JPH0340365B2 (enrdf_load_stackoverflow
Inventor
Harumi Aoki
Masahiro Kawasaki
Koji Suzuki
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
Application filed by Asahi Kogaku Kogyo Co Ltd filed Critical Asahi Kogaku Kogyo Co Ltd
Priority to JP10861180A priority Critical patent/JPS5734509A/ja
Priority to DE3131053A priority patent/DE3131053C2/de
Priority to US06/290,415 priority patent/US4410258A/en
Priority to GB8124181A priority patent/GB2082010B/en
Publication of JPS5734509A publication Critical patent/JPS5734509A/ja
Priority to GB08412315A priority patent/GB2141892B/en
Publication of JPH0340365B2 publication Critical patent/JPH0340365B2/ja
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
    • 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)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Focusing (AREA)
  • Automatic Focus Adjustment (AREA)
JP10861180A 1980-08-07 1980-08-07 Automatic focusing detector of camera Granted JPS5734509A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP10861180A JPS5734509A (en) 1980-08-07 1980-08-07 Automatic focusing detector of camera
DE3131053A DE3131053C2 (de) 1980-08-07 1981-08-05 Automatische Fokussierungsermittlungseinrichtung für eine Kamera
US06/290,415 US4410258A (en) 1980-08-07 1981-08-06 Automatic focus detecting device for camera
GB8124181A GB2082010B (en) 1980-08-07 1981-08-07 Automatic focus detecting devices for cameras
GB08412315A GB2141892B (en) 1980-08-07 1984-05-14 Automatic focus detecting devices for cameras

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10861180A JPS5734509A (en) 1980-08-07 1980-08-07 Automatic focusing detector of camera

Publications (2)

Publication Number Publication Date
JPS5734509A true JPS5734509A (en) 1982-02-24
JPH0340365B2 JPH0340365B2 (enrdf_load_stackoverflow) 1991-06-18

Family

ID=14489182

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10861180A Granted JPS5734509A (en) 1980-08-07 1980-08-07 Automatic focusing detector of camera

Country Status (1)

Country Link
JP (1) JPS5734509A (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6267509A (ja) * 1985-09-20 1987-03-27 Olympus Optical Co Ltd 自動合焦装置
US4959737A (en) * 1987-06-12 1990-09-25 Minolta Camera Kabushiki Kaisha Image scanning apparatus for use in an image reader, a copying machine and the like

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4958826A (enrdf_load_stackoverflow) * 1972-10-04 1974-06-07
JPS5154432A (en) * 1974-11-07 1976-05-13 Asahi Optical Co Ltd Shotenkenshutsusochi
JPS5518652A (en) * 1978-07-28 1980-02-08 Canon Inc Imaging state detecting system of image

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4958826A (enrdf_load_stackoverflow) * 1972-10-04 1974-06-07
JPS5154432A (en) * 1974-11-07 1976-05-13 Asahi Optical Co Ltd Shotenkenshutsusochi
JPS5518652A (en) * 1978-07-28 1980-02-08 Canon Inc Imaging state detecting system of image

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6267509A (ja) * 1985-09-20 1987-03-27 Olympus Optical Co Ltd 自動合焦装置
US4959737A (en) * 1987-06-12 1990-09-25 Minolta Camera Kabushiki Kaisha Image scanning apparatus for use in an image reader, a copying machine and the like

Also Published As

Publication number Publication date
JPH0340365B2 (enrdf_load_stackoverflow) 1991-06-18

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