US Patent Issued to GOOGLE on Oct. 27 for "High precision facet structures for reflective waveguides" (California Inventor)

ALEXANDRIA, Va., Oct. 27 -- United States Patent no. 12,775,121, issued on Oct. 27, was assigned to GOOGLE LLC (Mountain View, Calif.).

"High precision facet structures for reflective waveguides" was invented by Hui Son (Hayward, Calif.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A dual-stage process is implemented to achieve a desired shape degree of flatness and parallelism of a reflective waveguide facet structure. In a first stage, a coarse substrate having two major surfaces opposite each other and a series of facets that approximate a target shape and degree of smoothness is formed. In a second stage, at least one major surface of the coarse substrate is coated with a veneer, and the veneer is shape...