Interferometric moire pattern encoded security holograms with concealed phase object

摘要

This paper describes an interferometry-based scheme for concealing phase objects in a security hologram. The decoding process isbased on geometrical moire technique and requires a key for hologram authenticity verification. Decoding process is straightforward and could be carried out in white light, making it suitable for validation of security holograms. The method is described and experimental results are presented.