1. A security device, which comprises: a planar array of image icons with a substantially regular array spacing between a substantial number of image icons within the image icon array; and a planar array of image icon focusing elements disposed a substantially uniform distance from the planar array of image icons, at least a portion of the image icon focusing elements forming at least one synthetically magnified image of at least a portion of the image icons, wherein, the security device has a thickness of less than 50 microns, or image icon focusing elements having an effective base diameter of less than 50 microns, or both.