ALEXANDRIA, Va., April 15 -- United States Patent no. 12,601,867, issued on April 14, was assigned to Vuzix Corp. (West Henrietta, N.Y.).
"Image light guide with zoned diffractive optic" was invented by Robert J. Schultz (Victor, N.Y.) and Marek W. Kowarz (Henrietta, N.Y.).
According to the abstract* released by the U.S. Patent & Trademark Office: "An image light guide for conveying a virtual image, including a waveguide, an in-coupling diffractive optic operable to direct image-bearing light beams into the waveguide, and an out-coupling diffractive optic operable to direct the image-bearing light beams from the waveguide toward an eyebox. The out-coupling diffractive optic having two or more zones each including a set of diffractive feat...