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JPS55108629A - Focus detector of camera - Google Patents

Focus detector of camera

Info

Publication number
JPS55108629A
JPS55108629A JP1525579A JP1525579A JPS55108629A JP S55108629 A JPS55108629 A JP S55108629A JP 1525579 A JP1525579 A JP 1525579A JP 1525579 A JP1525579 A JP 1525579A JP S55108629 A JPS55108629 A JP S55108629A
Authority
JP
Japan
Prior art keywords
photo detector
detector arrays
contrast
arrays
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
JP1525579A
Other languages
Japanese (ja)
Inventor
Yoriyuki Uno
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 JP1525579A priority Critical patent/JPS55108629A/en
Priority to US06/117,589 priority patent/US4352545A/en
Priority to DE19803005044 priority patent/DE3005044C2/en
Priority to FR8003066A priority patent/FR2449293A1/en
Priority to GB8004788A priority patent/GB2047037B/en
Publication of JPS55108629A publication Critical patent/JPS55108629A/en
Pending legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE: To simplify production and achieve higher performance by using two arrays of contrast-detecting photo detector arrays.
CONSTITUTION: Half mirrors 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 contrast-detecting photo detector arrays 3, 5 by way of the optical system consisting of glass blocks 13W15. As a result of this, the luminous flux incident from the photographing lens 2 is split to two and is observed by the eyes 12 through the focal plane 8 and condenser lens 9. At the same time, it enters the photo detector arrays 3, 5 through a half mirror 16 and mirror 17 and from the comparision of the contrast outputs of the both photo detector arrays 3, 5, the near or far defocusings and focus matching are detected. Hence, there is no occurrence of focus matching defect and time lag as with the case of using single sensor and single line sensor and the accuracy required for production is lowered.
COPYRIGHT: (C)1980,JPO&Japio
JP1525579A 1979-02-13 1979-02-13 Focus detector of camera Pending JPS55108629A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP1525579A JPS55108629A (en) 1979-02-13 1979-02-13 Focus detector of camera
US06/117,589 US4352545A (en) 1979-02-13 1980-02-01 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
JP1525579A JPS55108629A (en) 1979-02-13 1979-02-13 Focus detector of camera

Publications (1)

Publication Number Publication Date
JPS55108629A true JPS55108629A (en) 1980-08-21

Family

ID=11883740

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1525579A Pending JPS55108629A (en) 1979-02-13 1979-02-13 Focus detector of camera

Country Status (1)

Country Link
JP (1) JPS55108629A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5843409A (en) * 1981-09-10 1983-03-14 Asahi Optical Co Ltd Focus position detection method
JPS5897012A (en) * 1981-12-07 1983-06-09 Olympus Optical Co Ltd Focus detector
JPS5994720A (en) * 1982-11-22 1984-05-31 Olympus Optical Co Ltd Focusing detector

Citations (4)

* 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
JPS5350851A (en) * 1976-10-20 1978-05-09 Hitachi Ltd Automatic focus control apparatus of microscope
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 (4)

* 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
JPS5350851A (en) * 1976-10-20 1978-05-09 Hitachi Ltd Automatic focus control apparatus of microscope
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 (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5843409A (en) * 1981-09-10 1983-03-14 Asahi Optical Co Ltd Focus position detection method
JPS5897012A (en) * 1981-12-07 1983-06-09 Olympus Optical Co Ltd Focus detector
JPS5994720A (en) * 1982-11-22 1984-05-31 Olympus Optical Co Ltd Focusing detector

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