Abstract: A micro-optic device includes an optical spacer having a first side and a second side, an icon layer comprising a plurality of image icons of a first color disposed on the first side of the optical spacer, and a focusing layer comprising a plurality of refractive focusing elements disposed on the second side of the optical spacer. The plurality of refractive focusing elements project a synthetically magnified image of the plurality of image icons, and image icons of the first color project a component of the synthetically magnified image that is of the first color. Additionally, the refractive focusing elements are doped with a machine readable taggant which emits a characteristic signal at a first frequency in the ultraviolet spectrum.