Viavi Solutions Inc.
Non-color shifting multilayer structures and protective coatings thereon

Abstract:

An omnidirectional structural color pigment having a protective coating. The pigment has a first layer of a first material and a second layer of a second material, the second layer extending across the first layer. In addition, the pigment reflects a band of electromagnetic radiation having a predetermined full width at half maximum (FWHM) of less than 300 nm and a predetermined color shift of less than 30.degree. when the pigment is exposed to broadband electromagnetic radiation and viewed from angles between 0 and 45.degree.. The pigment has a weather resistant coating that covers an outer surface thereof and reduces a relative photocatalytic activity of the pigment by at least 50%.