ALEXANDRIA, Va., July 7 -- United States Patent no. 12,674,987, issued on July 7, was assigned to LUMUS LTD. (Ness Ziona, Israel).

"Multi-layer coating structure to minimize phase shifts, method of manufacture, waveguide and head mount display" was invented by Ronen Chriki (Lod, Israel) and Elad Sharlin (Ness Ziona, Israel).

According to the abstract* released by the U.S. Patent & Trademark Office: "An apparatus includes a waveguide and one or more partially reflective surfaces embedded inside the waveguide, wherein each of the one or more partially reflective surfaces includes a multi-layer coating structure, wherein a first portion of the multi-layer coating structure induces an overall phase shift of light propagating through the first...