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:
Jul. 10, 1984
Filed:
Jun. 07, 1982
Applicant:
Inventors:
Kazuyuki Nemoto, Hachioji, JP;
Kazunori Mizokami, Hachioji, JP;
Assignee:
Olympus Optical Company Ltd., , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B / ;
U.S. Cl.
CPC ...
354459 ; 354480 ;
Abstract
An apparatus for reflection photometry of a single lens reflex camera includes a first shutter blind, the surface of which exhibits a reflectivity which is nearly one-half the reflectivity of a film surface. During the time a photoelectric transducer element, used for photometry, receives light reflection from the surface of the first blind, an output from a photometric circuit is doubled so as to be substantially equal to the output produced when the transducer element receives light reflection from the film surface during the running of the first blind.