ALEXANDRIA, Va., March 5 -- United States Patent no. 12,242,060, issued on March 4, was assigned to OPTINVENT (Rennes, France).
"Multi-pupil expansion light guide assembly with rod" was invented by Yao Liu (Rennes, France), Khaled Sarayeddine (Rennes, France) and Simon Julien (Rennes, France).
According to the abstract* released by the U.S. Patent & Trademark Office: "A system includes a transparent rod, a light guide assembly, and first and second transparent monolithic optical parts (TMOPs) having the same refractive index. The first TMOP has a first surface having two prism arrays separated by a flat surface having a partially reflective coating, and an opposite second flat surface. Each prism array has two prisms having first and seco...