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:
Nov. 12, 2019
Filed:
Apr. 25, 2018
Applicant:
Maxell, Ltd., Otokuni-gun, Kyoto, JP;
Inventors:
Assignee:
MAXELL, LTD., Kyoto, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04N 5/225 (2006.01); G02B 3/08 (2006.01); G02B 3/00 (2006.01); G02B 27/46 (2006.01); H04N 5/232 (2006.01); G06K 9/00 (2006.01); G08G 1/16 (2006.01); G02B 27/00 (2006.01); G02B 27/12 (2006.01); H04N 5/222 (2006.01);
U.S. Cl.
CPC ...
H04N 5/2254 (2013.01); G02B 3/0043 (2013.01); G02B 3/08 (2013.01); G02B 27/0075 (2013.01); G02B 27/123 (2013.01); G02B 27/46 (2013.01); G06K 9/00805 (2013.01); G08G 1/166 (2013.01); H04N 5/2226 (2013.01); H04N 5/23229 (2013.01); G02B 3/0056 (2013.01);
Abstract
A phase filteris configured to comprise an annular structure rotationally symmetrical about an optical axis, each annular zone including a cross-sectional shape of substantially parabola for uniformly extending incident rays of light on a focal plane and letting the rays overlap with each other.