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. 24, 2020
Filed:
May. 31, 2018
Microsoft Technology Licensing, Llc, Redmond, WA (US);
Karlton David Powell, Lake Stevens, WA (US);
Microsoft Technology Licensing, LLC, Redmond, WA (US);
Abstract
An optical system comprises an optical sensor configured to receive light within one or more bandwidths of interest and an optical stack placed optically in front of the optical sensor. The optical stack comprises a polymeric layer optically transparent to at least the one or more bandwidths of interest, and a matching index layer positioned optically in front of the polymeric layer, the matching index layer and polymeric layer having refractive indexes within a threshold similarity. The optical stack further includes a bumpy diffuse surface embedded between the polymeric layer and the matching index layer, and a partially reflective layer positioned in between the bumpy diffuse surface and the matching index layer, the partially reflective layer configured to at least partially reflect at least some wavelengths outside the one or more bandwidths of interest.