Identification of a replicable optical security element using laser speckle

arXiv:2404.08723v1 Announce Type: new
Abstract: An optical security element containing an area of random rough relief is proposed. It combines the low cost of mass replication inherent in traditional security holograms with the impossibility of holographic copying, when the wave restored by the hologram is rewritten as a copy of this hologram. The proposed optical element is also protected from contact and photographic copying. Laboratory samples of optical elements were obtained by taking replicas of a rough surface. Identification of …

area arxiv copy cost cs.cr hologram identification laser low optical physics.optics random relief replication security