ALEXANDRIA, Va., Sept. 30 -- United States Patent no. 12,429,640, issued on Sept. 30, was assigned to VIAVI Solutions Inc. (Chandler, Ariz.).
"Optical interference filter" was invented by William D. Houck (Santa Rosa, Calif.).
According to the abstract* released by the U.S. Patent & Trademark Office: "An optical interference filter includes a substrate and one or more sets of layers that are disposed on the substrate. Each set of layers includes a first layer that comprises at least scandium, aluminum, and nitrogen, and a second layer that comprises at least silicon and oxygen. The first layer may comprise at least one of a scandium aluminum nitride (ScAlN) material or a scandium aluminum nitrogen oxide (ScAlNO) material. The second layer...