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:
Jun. 21, 2022
Filed:
May. 20, 2019
Facebook Technologies, Llc, Menlo Park, CA (US);
Andrew John Ouderkirk, Menlo Park, CA (US);
Hannah Noble, Menlo Park, CA (US);
Babak Amirsolaimani, Menlo Park, CA (US);
Yusufu Njoni Bamaxam Sulai, Menlo Park, CA (US);
FACEBOOK TECHNOLOGIES, LLC, Menlo Park, CA (US);
Abstract
An optical system includes an optical lens, a polarization volume hologram (PVH) layer arranged over the optical lens, and an IR absorbing structure arranged between the optical lens and the PVH layer. The PVH layer being configured to reflect infrared (IR) light. The IR absorbing structure includes a quarter-wave plate (QWP) arranged between the optical lens and the PVH layer and a linear absorptive polarizer arranged between the QWP and the optical lens. The linear absorptive polarizer is configured to absorb IR light.