Pigment med et betraktningsvinkelavhengig fargeskift, fremgangsmåte til fremstilling av slike pigmenter, anvendelse avslike pigmenter i sikkerhetsapplikasjoner, belegningssammensetningsom omfatter slike pigmenter og en detekteringsinnretning

摘要

The invention describes luminescent optically variable pigments (OVP), methods for obtaining such pigments, as well as the use of such pigments as security elements in inks, coatings and articles. The luminescence centers are preferably incorporated into the dielectric material of the OVP's opticalFabry-Perot resonance cavity, allowing for the machine-discrimination of luminescent OVP from simple mixtures of luminescents and non-luminescent OVP.