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:
Dec. 30, 2014
Filed:
Apr. 13, 2012
Applicants:
Shoichi Takemoto, Utsunomiya, JP;
Yutaka Iriyama, Utsunomiya, JP;
Ryuji Ohmuro, Utsunomiya, JP;
Inventors:
Assignee:
Canon Kabushiki Kaisha, , JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04N 5/225 (2006.01); G02B 13/16 (2006.01); G03B 17/14 (2006.01); G03B 11/00 (2006.01); G02B 5/20 (2006.01); G02B 7/00 (2006.01); G02B 7/04 (2006.01);
U.S. Cl.
CPC ...
G03B 17/14 (2013.01); G03B 2205/0092 (2013.01); G03B 11/00 (2013.01); G02B 5/205 (2013.01); G02B 7/006 (2013.01); G02B 7/04 (2013.01);
Abstract
An image pickup apparatus includes: a lens apparatus; and a camera apparatus that can be attached and removed from the lens apparatus, wherein the camera apparatus includes: an image pickup element; and an optical element configured to be inserted and removed from an optical path, the optical element is a ND filter, and the ND it has a surface with positive refractive power. A ratio of a thickness of the optical element on an optical axis and a thickness of the optical length adjustment unit on the optical axis is appropriately set.