Patent ID: 8815337
Filing Date: 2014-08-26
Classification: B29D,Y10T

Abstract:
1. A method for producing an optically variable device (OVD), the method comprising: adhering an optically-transmissive polymeric layer with a first layer of partially reflective, partially absorptive, and partially transmissive material; and adhering a second layer of partially reflective, partially absorptive, and partially transmissive material to said optically-transmissive polymeric layer to form a multi-layer etalon structure in which, across an entire area of the OVD, said optically-transmissive polymeric layer is an etalon spacer layer between said first and second layers, wherein said optically-transmissive polymeric layer is formed in vacuum by depositing a monomeric layer and radiation curing said monomeric layer within 2 seconds after its deposition and under conditions that result in (i) a maximum variation in thickness thereof not exceeding 5 percent across the entire surface area of the OVD and (ii) minimization of differential re-evaporation of said monomeric layer.