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. 14, 2020
Filed:
Oct. 26, 2017
Facebook Technologies, Llc, Menlo Park, CA (US);
Jacques Gollier, Redmond, WA (US);
Yusufu Sulai, Bothell, WA (US);
Alexander Sohn, Seattle, WA (US);
Facebook Technologies, LLC, Menlo Park, CA (US);
Abstract
A Fresnel lens with truncated apexes includes a first lens surface that defines at least one portion of a Fresnel surface profile. The at least one portion of the Fresnel lens surface profile is defined by a plurality of truncated Fresnel structures. Each truncated Fresnel structure of the plurality of the truncated Fresnel structures corresponds to a respective slope facet, a respective draft facet and a respective flat apex surface located between the respective slope facet and the respective draft facet. Also disclosed are a method of making a Fresnel lens mold, and a method of making the Fresnel lens with truncated apexes using the Fresnel lens mold.