Dynamic patterns based on the superposition of micropattern array and microlens array

Dynamic patterns have been studied theoretically and experimentally in this work. The microstructure consists of a base layer made up of micropattern array, and a superposed revealing layer made up of microlens array. Dynamic patterns will be observed directly on the revealing layer without visual facilities. When the viewing angle changes, displacement of dynamic patterns is produced. This technology is compared with traditional moiré techniques. In addition, analytical models to describe its structures are derived based on a vector method. There is a good agreement between the theoretical and experimental results, which indicates this study is helpful to design various kinds of dynamic patterns and dynamic effects, and this technology can be applied for many applications, especially in anti-counterfeiting field.