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:
Jul. 18, 2017
Filed:
May. 29, 2015
Applicants:
Essilor International (Compagnie Generale D'optique), Charenton le Pont, FR;
Nikon Corporation, Minato-ku, Tokyo, JP;
Inventors:
Toru Fujii, Hiki-gun, JP;
Alain Goulet, Ormesson-sur-Marne, FR;
Assignees:
Essilor International (Compagnie Generale D'Optique), Charenton Le Pont, FR;
Nikon Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02C 7/02 (2006.01); G02B 3/08 (2006.01);
U.S. Cl.
CPC ...
G02C 7/022 (2013.01); G02B 3/08 (2013.01); G02C 7/02 (2013.01); G02C 2202/20 (2013.01);
Abstract
A refractive Fresnel lens used for an optical system including an image plane, which includes a plurality of zone lens surfaces disposed concentrically and a plurality of side wall surfaces each formed between adjacent zone lens surfaces, is characterized in that the side wall surfaces are modulated so as to spatially spread in the image plane noise light due to reflection and/or refraction at the side wall surfaces.