JPS54121123A - Optical device of focusing detection for camera - Google Patents

Optical device of focusing detection for camera

Info

Publication number
JPS54121123A
JPS54121123A JP2804978A JP2804978A JPS54121123A JP S54121123 A JPS54121123 A JP S54121123A JP 2804978 A JP2804978 A JP 2804978A JP 2804978 A JP2804978 A JP 2804978A JP S54121123 A JPS54121123 A JP S54121123A
Authority
JP
Japan
Prior art keywords
plane
face
lens system
shutter
detected
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
JP2804978A
Other languages
Japanese (ja)
Inventor
Toshihiro Imai
Original Assignee
Olympus Optical 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 Olympus Optical Co Ltd filed Critical Olympus Optical Co Ltd
Priority to JP2804978A priority Critical patent/JPS54121123A/en
Publication of JPS54121123A publication Critical patent/JPS54121123A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To provide a highly accurate and miniature device of easy adjustment by providing the focus detector including an auxiliary optical system retractably from the photographing optical path in the specified position before the focal plane shutter.
CONSTITUTION: The photo detecting face 7 of a focus detector 6 which is installed before a focal plane shutter 5 and is provided with an auxiliary optical system 8 is placed in the position conjugate with the film plane 4. When the focusing is detected through comparison of the contrast of the incident light of the face 4 from the photographing lens system 1 by a photo detector is detected, the subject image is formed on the plane 4. The installation of this plane 7 near the plane 4 reduces the difference of the distance between the face 4 and lens system 9 and the distance between the lens system 9 and face 4, as a result of which the lens system 9 becomes longer in its focal length and smaller in aperture and becomes the one of small aberrations, easy adjustment and a small size. Hence, the device 6 is made retractable from the photographing optical path by turning the device 6 in cooperation with the movement of the shutter 5.
COPYRIGHT: (C)1979,JPO&Japio
JP2804978A 1978-03-11 1978-03-11 Optical device of focusing detection for camera Pending JPS54121123A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2804978A JPS54121123A (en) 1978-03-11 1978-03-11 Optical device of focusing detection for camera

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2804978A JPS54121123A (en) 1978-03-11 1978-03-11 Optical device of focusing detection for camera

Publications (1)

Publication Number Publication Date
JPS54121123A true JPS54121123A (en) 1979-09-20

Family

ID=12237889

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2804978A Pending JPS54121123A (en) 1978-03-11 1978-03-11 Optical device of focusing detection for camera

Country Status (1)

Country Link
JP (1) JPS54121123A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH023028A (en) * 1988-06-17 1990-01-08 Asahi Optical Co Ltd Automatic focusing camera

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH023028A (en) * 1988-06-17 1990-01-08 Asahi Optical Co Ltd Automatic focusing camera

Similar Documents

Publication Publication Date Title
JPS55111929A (en) Automatic focusing device
JPS5428133A (en) Optical path extension device with focus detection function
JPS5299820A (en) Focusing glass
US3327600A (en) Reflex camera viewfinder with photocell
JPS54121123A (en) Optical device of focusing detection for camera
JPS59146008A (en) Focusing detector
JPS547323A (en) Optical system for detecting point of focus
JPS5888709A (en) Optical system for focusing detection
JPS556361A (en) Focus measuring position assigning device in auto-focusing camera
JPS552232A (en) Focusing optical device for camera
JPH02181109A (en) Automatic focusing device for camera
JPS55130523A (en) Automatic focus system single-lens reflex camera
JPS6057826A (en) Close-up photographic device of automatic focusing camera
JPS55106424A (en) Single-lens reflex camera
JPS55159417A (en) Aperture value detector
JPS56128923A (en) Focus detector
JPS5887513A (en) Focus detecting device and focused position setting device
JPS54107337A (en) Focusing device of single-lens reflex camera
JPH0224615A (en) Focus detecting device
JPS55106430A (en) Automatic focusing camera
JPS5587115A (en) Focus detector
JPS5492321A (en) Optical system for focus detecting of single-lens reflex camera
JPS5552030A (en) Focusing optical device for single-lens reflex camera
JPS5936203A (en) Picture processing device
JPS54121122A (en) Focusing detector of single lens reflex camera