ALEXANDRIA, Va., Feb. 17 -- United States Patent no. 12,554,137, issued on Feb. 17, was assigned to GOOGLE LLC (Mountain View, Calif.).
"Freeform polarization lightguide" was invented by Oscar Alberto Martinez (Mountain View, Calif.) and Yi Qin (Mountain View, Calif.).
According to the abstract* released by the U.S. Patent & Trademark Office: "An optical device includes a freeform lightguide to direct light from a display to a region where a user's eye is expected to be positioned. The freeform lightguide includes a lightguide substrate with first and second opposing surfaces extending between a first end and a second end of the freeform lightguide, with at least the second surface being a freeform surface and being overlaid with a partia...