The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 21, 1986
Filed:
Mar. 28, 1985
Kazuo Ikari, Hachiouji, JP;
Toru Fujii, Hino, JP;
Olympus Optical Co., Ltd., Tokyo, JP;
Abstract
A finder optical system for single-lens reflex cameras comprising a screen on which an image by a photographing lens is to be formed through a half-mirror and a relay lens for forming the image formed on the screen in a focal position in front of a magnifying lens so that, when the focal distance of the magnifying lens is represented by f.sub.oc and the distance from the screen to the front principal point position of the magnifying lens is represented by L, the relation of 0.2.ltoreq.f.sub.oc /L.ltoreq.0.8 will satisfied, in order to make it easy to replace the photographing lens and to make the magnification high while keeping the eye point in a position sufficiently separated from the screen.