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. 14, 2016
Filed:
Aug. 11, 2015
Applicant:
Canon Denshi Kabushiki Kaisha, Chichibu-shi, JP;
Inventors:
Takahito Yoshizawa, Kawaguchi, JP;
Kyousuke Miyashita, Tokyo, JP;
Assignee:
Canon Denshi Kabushiki Kaisha, Chichibu-shi, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03B 9/06 (2006.01); G03B 9/14 (2006.01);
U.S. Cl.
CPC ...
G03B 9/06 (2013.01); G03B 9/14 (2013.01);
Abstract
A device according to the present invention includes at least one first light amount adjustment blade moving rectilinearly in a direction crossing a light passage direction and at least one second light amount adjustment blade pivoting within a plane crossing the light passage direction. When a light passage aperture of a polygonal shape formed by annularly superposing the first light amount adjustment blade and the second light amount adjustment blade is enlarged, a shape of the light passage aperture comes close to a circular shape from a polygonal shape.