US Patent Issued to VIAVI Solutions on May 12 for "Optical security element" (California Inventors)

ALEXANDRIA, Va., May 12 -- United States Patent no. 12,623,480, issued on May 12, was assigned to VIAVI Solutions Inc. (Chandler, Ariz.).

"Optical security element" was invented by Vladimir P. Raksha (Santa Rosa, Calif.), Kees-Jan Delst (Fairfax, Calif.) and Paul T. Kohlmann (Windsor, Calif.).

According to the abstract* released by the U.S. Patent & Trademark Office: "An optical security element may be printed on a substrate. The optical security element may include a plurality of bifunctional pigment flakes provided in a binder. A bifunctional pigment flake in the plurality of bifunctional pigment flakes may comprise a first surface having a diffraction grating relief with a first modulation, and a second surface having a second modulati...