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:
Jan. 14, 2020
Filed:
Jun. 23, 2017
Applicant:
Canon Kabushiki Kaisha, Tokyo, JP;
Inventor:
Kazuhiko Momoki, Koshigaya, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B 27/28 (2006.01); G02B 27/12 (2006.01); H04N 5/225 (2006.01);
U.S. Cl.
CPC ...
G02B 27/288 (2013.01); G02B 27/126 (2013.01); H04N 5/2254 (2013.01);
Abstract
An optical low pass filter includes a first birefringent plate, a second birefringent plate, a third birefringent plate, and a fourth birefringent plate. A conditional expression of 1.15<b/a<3 is satisfied, in a case where a separation width of an incident light ray in each of the first birefringent plate and the second birefringent plate is set to be a and a separation width of an incident light ray in each of the third birefringent plate and the fourth birefringent plate is set to be b.