ALEXANDRIA, Va., Jan. 28 -- United States Patent no. 12,535,671, issued on Jan. 27, was assigned to Magic Leap Inc. (Plantation, Fla.).

"Optical eyepiece using single-sided patterning of grating couplers" was invented by Kang Luo (Austin, Texas), Vikramjit Singh (Pflugerville, Texas), Nai-Wen Pi (Plano, Texas), Shuqiang Yang (Austin, Texas) and Frank Y. Xu (Austin, Texas).

According to the abstract* released by the U.S. Patent & Trademark Office: "An eyepiece includes a substrate and an in-coupling grating patterned on a single side of the substrate. A first grating coupler is patterned on the single side of the substrate and has a first grating pattern. The first grating coupler is optically coupled to the in-coupling grating. A second g...