Braginets, E.V.; Girnyk, V.I.; Kostyukevych, S.A.; Kurashov, V.N.; Soroka, A.A.; Moskalenko, N.
(Semiconductor Physics Quantum Electronics & Optoelectronics, 2006)
It is well known that one of the basic functions of security holograms is the maximal complication of their non-authorized reproduction, in other words – counterfeiting. To solve the problem, concealed images that can be ...