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JPS55108630A - Focus detector of camera - Google Patents

Focus detector of camera

Info

Publication number
JPS55108630A
JPS55108630A JP1525679A JP1525679A JPS55108630A JP S55108630 A JPS55108630 A JP S55108630A JP 1525679 A JP1525679 A JP 1525679A JP 1525679 A JP1525679 A JP 1525679A JP S55108630 A JPS55108630 A JP S55108630A
Authority
JP
Japan
Prior art keywords
contrast
photo detector
detector arrays
photographing lens
detecting photo
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.)
Pending
Application number
JP1525679A
Other languages
Japanese (ja)
Inventor
Masao Sadanao
Harumi Aoki
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 JP1525679A priority Critical patent/JPS55108630A/en
Priority to US06/118,057 priority patent/US4349254A/en
Priority to DE19803005044 priority patent/DE3005044C2/en
Priority to FR8003066A priority patent/FR2449293A1/en
Priority to GB8004788A priority patent/GB2047037B/en
Publication of JPS55108630A publication Critical patent/JPS55108630A/en
Pending legal-status Critical Current

Links

Landscapes

  • Focusing (AREA)
  • Automatic Focus Adjustment (AREA)

Abstract

PURPOSE: To achieve higher performance by using three rows of contrast-detecting photo detector arrays.
CONSTITUTION: Half mirros 7, 8 are disposed between a photographing lens 2 and a film surface 6 and below these is installed the substrate 16 disposed with three rows of contrast-detecting photo detector arrays 3W5 constituted respectively by the same number by leaving spacings I, H, via the optical system consisting of glass blocks 12W15. As a result of this, the incident luminous flux from the photographing lens 2 is split to two and is observed by the eyes 12 through the focal plane 17 and condenser lens etc. At the same time, it enters the contrast-detecting photo detector arrays 3W5 through a half mirror 9 and mirror 11 and by comparing the contrast outputs thereof. the front and rear defocusings and focus matching are detected. Hence, the focus matching defect owing to hand blurr such as in the case of the system of moving the photographing lens 2 by moving single sensor does not occur.
COPYRIGHT: (C)1980,JPO&Japio
JP1525679A 1979-02-13 1979-02-13 Focus detector of camera Pending JPS55108630A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP1525679A JPS55108630A (en) 1979-02-13 1979-02-13 Focus detector of camera
US06/118,057 US4349254A (en) 1979-02-13 1980-02-04 Camera focus detecting device
DE19803005044 DE3005044C2 (en) 1979-02-13 1980-02-11 Focus detection device for a camera
FR8003066A FR2449293A1 (en) 1979-02-13 1980-02-12 DEVICE FOR DETECTING THE FOCUSING OF A CAMERA
GB8004788A GB2047037B (en) 1979-02-13 1980-02-13 Focus detecting system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1525679A JPS55108630A (en) 1979-02-13 1979-02-13 Focus detector of camera

Publications (1)

Publication Number Publication Date
JPS55108630A true JPS55108630A (en) 1980-08-21

Family

ID=11883767

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1525679A Pending JPS55108630A (en) 1979-02-13 1979-02-13 Focus detector of camera

Country Status (1)

Country Link
JP (1) JPS55108630A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57155528U (en) * 1981-03-27 1982-09-30
JPS5897009A (en) * 1981-12-04 1983-06-09 Olympus Optical Co Ltd Automatic focus adjusting method

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5245353A (en) * 1975-10-08 1977-04-09 Hitachi Ltd Automatically focusing device
JPS55105204A (en) * 1979-02-07 1980-08-12 Canon Inc Optical path branching filter
JPS55106421A (en) * 1979-02-09 1980-08-15 Ricoh Co Ltd Focusing detector

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5245353A (en) * 1975-10-08 1977-04-09 Hitachi Ltd Automatically focusing device
JPS55105204A (en) * 1979-02-07 1980-08-12 Canon Inc Optical path branching filter
JPS55106421A (en) * 1979-02-09 1980-08-15 Ricoh Co Ltd Focusing detector

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57155528U (en) * 1981-03-27 1982-09-30
JPS5897009A (en) * 1981-12-04 1983-06-09 Olympus Optical Co Ltd Automatic focus adjusting method

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