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:
Jun. 25, 1985
Filed:
Sep. 08, 1982
Applicant:
Inventors:
Soichi Nakamura, Kamakura, JP;
Kunio Konno, Yokohama, JP;
Assignee:
Nippon Kogaku K.K., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04N / ; G03B / ;
U.S. Cl.
CPC ...
358224 ; 358 55 ; 354166 ; 354219 ;
Abstract
A beam splitter extracts a light beam from light passing through a picture-taking lens system, and a viewfinder optical system directs the light beam to a viewfinder eyepiece. The optical system includes a focus screen, a master lens for imaging the light beam on the focus screen, a pentaroof prism disposed between the master lens and the focus screen, and an eyepiece for observing therethrough the image on the focus screen.