US Patent Issued to COERENT on March 18 for "Lens coating layer having three or more sub-layers of oxide or fluoride" (Italian Inventor)

ALEXANDRIA, Va., March 19 -- United States Patent no. 12,253,652, issued on March 18, was assigned to COERENT S.R.L. (Parabiago, Italy).

"Lens coating layer having three or more sub-layers of oxide or fluoride" was invented by Matteo De Vita (Nerviano, Italy).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention relates to a lens having a refractive index EtaIota coated at least partially on at least one of its surfaces with a layer of an anti-scratch lacquer having a refractive index r2 lower than Eta-Iota, wherein between said lens and said layer of anti-scratch lacquer a coating layer comprising at least 3 sub-layers of at least one compound selected from the group consisting of Zirconium ox...