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:
Feb. 25, 2020
Filed:
Dec. 19, 2017
Applicant:
Hitachi, Ltd., Chiyoda-ku, Tokyo, JP;
Inventors:
Mitsuhiko Oota, Tokyo, JP;
Takeshi Shimano, Tokyo, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 27/46 (2006.01); G02B 27/00 (2006.01); H04N 5/357 (2011.01);
U.S. Cl.
CPC ...
G02B 27/46 (2013.01); G02B 27/0025 (2013.01); G02B 27/0087 (2013.01); H04N 5/3577 (2013.01);
Abstract
Provided is an optical component including multiple annular zones that each provides a predetermined phase to a light flux passing through an optical system, where for each of the annular zones, the surface closer to the inner circumference of the optical component is substantially equal in area to the surface closer to the outer circumference thereof, and in a cross section in the radial direction of the optical component, the tangent at an outer circumferential end of each annular zone is substantially equal in inclination to the tangent at an inner circumferential end thereof.