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:
Mar. 28, 1978
Filed:
Jul. 23, 1976
Makoto Kuboshima, Sagamihara, JA;
Fuji Photo Film Co., Ltd., Minami-ashigara, JA;
Abstract
Large camera viewfinder system in which an eyepiece is positioned at an upper rear portion of the camera, to permit eye-level viewing and free adjustment of camera attitude and a viewfinder objective lens assembly which has the same focal length as and is movable equivalent amounts simultaneously with a movable front lens assembly of a taking lens assembly, is positioned level with and a short distance from the taking lens assembly, the viewfinder objective lens assembly and eyepiece being on opposite sides of the optical axis of the taking lens assembly, and light being transmitted therebetween by an optical system inside the camera. With the viewfinder objective lens assembly being close to the taking lens assembly but a comparatively long distance from the viewfinder eyepiece problems of parallax are minimum and image erection can be effected by a simple lens means, a heavy and expensive prism such as a roof-angle prism being unnecessary.