JPS55108631A - Focus detector of camera - Google Patents

Focus detector of camera

Info

Publication number
JPS55108631A
JPS55108631A JP1525779A JP1525779A JPS55108631A JP S55108631 A JPS55108631 A JP S55108631A JP 1525779 A JP1525779 A JP 1525779A JP 1525779 A JP1525779 A JP 1525779A JP S55108631 A JPS55108631 A JP S55108631A
Authority
JP
Japan
Prior art keywords
sensors
photographing lens
rows
self
disposed
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
JP1525779A
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 JP1525779A priority Critical patent/JPS55108631A/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 JPS55108631A publication Critical patent/JPS55108631A/en
Pending legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE: To achieve higher performance by using two rows of self-scanning type image sensors.
CONSTITUTION: Half mirros 6, 7 are disposed between a photographing lens 2 and a film surface 4 and below these is disposed the substrate 18 holding two rows of self-scanning type image sensors 3, 5 via the optical system consisting of glass blocks 13W15. As a result of this, the light incident from the photographing lens 2 is split to two and is observed in the eyes 12 through a condenser lens 9 and pentagonal prism 10. At the same time, it enters the sensors 3, 5 through a half mirror 16 and mirror 17 and by comparing the contrast outputs of the both sensors 3, 5, the front and rear defocusings and focus matching are detected. Hence, the focus matching defect owing to hand blur such as in the case of the system of moving the photographing lens 2 by using single sensor does not occur.
COPYRIGHT: (C)1980,JPO&Japio
JP1525779A 1979-02-13 1979-02-13 Focus detector of camera Pending JPS55108631A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP1525779A JPS55108631A (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
JP1525779A JPS55108631A (en) 1979-02-13 1979-02-13 Focus detector of camera

Publications (1)

Publication Number Publication Date
JPS55108631A true JPS55108631A (en) 1980-08-21

Family

ID=11883795

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1525779A Pending JPS55108631A (en) 1979-02-13 1979-02-13 Focus detector of camera

Country Status (1)

Country Link
JP (1) JPS55108631A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5859415A (en) * 1981-10-06 1983-04-08 Olympus Optical Co Ltd Focusing detection

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4958826A (en) * 1972-10-04 1974-06-07
JPS5245353A (en) * 1975-10-08 1977-04-09 Hitachi Ltd Automatically focusing device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4958826A (en) * 1972-10-04 1974-06-07
JPS5245353A (en) * 1975-10-08 1977-04-09 Hitachi Ltd Automatically focusing device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5859415A (en) * 1981-10-06 1983-04-08 Olympus Optical Co Ltd Focusing detection
JPH0145884B2 (en) * 1981-10-06 1989-10-05 Olympus Optical Co

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