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:
Sep. 11, 1984
Filed:
Sep. 29, 1982
Applicant:
Inventors:
Tokuichi Tsunekawa, Kanagawa, JP;
Yuichiro Konishi, Tokyo, JP;
Assignee:
Canon Kabushiki Kaisha, , US;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B / ;
U.S. Cl.
CPC ...
354416 ; 354431 ;
Abstract
Disclosed is an intermediate adapter to be used between the camera body and the photographing lens during close-up photography. A light beam splitter in the adapter housing projects part of the light from the lens to a sensor to produce an electric signal. An illumination device that lights a subject to be photographed is controlled by the signal produced by the light split by the light beam splitter. The beam splitter includes a diffraction arrangement that directs a portion of the light from the path to the film.