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For the optically variable films series, using the boundary conditions of electromagnetic waves, we have given the propagation wave equation of S-polarized light wave in the optical variable film system with razor-thin metal film, which can be used to calculate electromagnetic field distribution and the reflection coefficient for the light of any incident direction and the arbitrarily layered security film system. Based on the MATLAB programming we calculate the energy reflectivity of light for the security film system, we also analysis the reflective properties of the optical film system with some cases.

Reflective properties of Anti-forgery Optically variable films series