JPS5565938A - Finder - Google Patents

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Publication number
JPS5565938A
JPS5565938A JP13921078A JP13921078A JPS5565938A JP S5565938 A JPS5565938 A JP S5565938A JP 13921078 A JP13921078 A JP 13921078A JP 13921078 A JP13921078 A JP 13921078A JP S5565938 A JPS5565938 A JP S5565938A
Authority
JP
Japan
Prior art keywords
finder
reflecting mirror
optical system
constitution
lens system
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
JP13921078A
Other languages
Japanese (ja)
Inventor
Atsushi Kawamura
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.)
Ricoh Co Ltd
Original Assignee
Ricoh 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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP13921078A priority Critical patent/JPS5565938A/en
Publication of JPS5565938A publication Critical patent/JPS5565938A/en
Pending legal-status Critical Current

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  • Viewfinders (AREA)

Abstract

PURPOSE: To make the constitution of the finder simple and make its making and assembling easy by installing the finder optical system with distance to the specified position with the radius of curvature of its reflecting mirror being set at the specified value.
CONSTITUTION: When the radius of curvature of the reflecting mirror 6 of the double image coincidence optical system of the finder with range through coincidence of double images is selected at 2.8f (f: combined focal length of an objective lens system 3) and the reflecting mirror 6 is installed in the position symmetrical to the rear side main point of the lens system 3 with respect to a semi-transparent mirror 4, then the magnification and diopter of the finder optical system by the lens system 3 and the double image coincidence optical system coincide without providing any range finding lens between the reflecting mirror 6 and the semi-transparent mirror 4. Hence, the finder becomes of the simple constitution of less number of optical parts and its making and assembling may be readily accomplished.
COPYRIGHT: (C)1980,JPO&Japio
JP13921078A 1978-11-11 1978-11-11 Finder Pending JPS5565938A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13921078A JPS5565938A (en) 1978-11-11 1978-11-11 Finder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13921078A JPS5565938A (en) 1978-11-11 1978-11-11 Finder

Publications (1)

Publication Number Publication Date
JPS5565938A true JPS5565938A (en) 1980-05-17

Family

ID=15240090

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13921078A Pending JPS5565938A (en) 1978-11-11 1978-11-11 Finder

Country Status (1)

Country Link
JP (1) JPS5565938A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10333212A (en) * 1997-05-27 1998-12-18 Asahi Optical Co Ltd Finder device for camera
JPH10333213A (en) * 1997-05-27 1998-12-18 Asahi Optical Co Ltd Finder device for camera
JPH10333214A (en) * 1997-05-27 1998-12-18 Asahi Optical Co Ltd Finder device for camera
JPH10333215A (en) * 1997-05-27 1998-12-18 Asahi Optical Co Ltd Finder device for camera

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10333212A (en) * 1997-05-27 1998-12-18 Asahi Optical Co Ltd Finder device for camera
JPH10333213A (en) * 1997-05-27 1998-12-18 Asahi Optical Co Ltd Finder device for camera
JPH10333214A (en) * 1997-05-27 1998-12-18 Asahi Optical Co Ltd Finder device for camera
JPH10333215A (en) * 1997-05-27 1998-12-18 Asahi Optical Co Ltd Finder device for camera

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