ALEXANDRIA, Va., March 26 -- United States Patent no. 12,259,554, issued on March 25, was assigned to Adeia Guides Inc. (San Jose, Calif.).
"Superimposed diffractive gratings for optical elements of augmented reality and virtual reality displays" was invented by Yuval Ofir (Kfar Ha-Oranim, Israel).
According to the abstract* released by the U.S. Patent & Trademark Office: "Head-mounted displays with waveguides comprising superimposed diffractive gratings and methods for fabricating said waveguides are described herein. In an embodiment, a head-mounted display comprises an optical element and an image source that provides an image beam to an optical element. The optical element comprises two gratings superimposed over each other, at least ...