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. 10, 2019
Filed:
Aug. 03, 2016
Optical filter and optical system, image pickup apparatus, and lens apparatus which include the same
Applicant:
Canon Kabushiki Kaisha, Tokyo, JP;
Inventor:
Hironobu Koga, Utsunomiya, JP;
Assignee:
CANON KABUSHIKI KAISHA, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 5/20 (2006.01); G02B 1/11 (2015.01); G03B 11/00 (2006.01); G02B 5/22 (2006.01); H04N 5/225 (2006.01);
U.S. Cl.
CPC ...
G02B 5/20 (2013.01); G02B 1/11 (2013.01); G02B 5/205 (2013.01); G02B 5/22 (2013.01); G03B 11/00 (2013.01); H04N 5/2253 (2013.01); H04N 5/2254 (2013.01);
Abstract
An optical filter that has a region where a transmittance changes in a first direction and that includes a substrate and a first layer in order along a second direction orthogonal to the first direction, a thickness of the first layer in the second direction changes in the first direction, and an extinction coefficient of the first layer satisfies a predetermined conditional expression.
Koga, Hironobu. (2019). Optical filter and optical system, image pickup apparatus, and lens apparatus which include the same (U.S. Patent No. 10502877). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/10502877
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