Structural color moiré dynamic patterns with multi-color motion effects

An approach to achieve structural color 3D dynamic moiré images by overlaying a microlens array (MLA) onto the micropattern array (MPA) on polyester film is proposed in this study. Specifically, two types of filling structures within the MPA layer have been employed to produce vivid structural colors in the patterns. Furthermore, by modulating the structural parameters of the MLA layer via the thermal reflow process, the iridescent effect of the optical film is significantly enhanced. Additionally, this work demonstrates both orthogonal and reverse relative motion effects in the resulting iridescent moiré images. The proposed microstructural device offers a low-cost paradigm suitable for applications in green printing, anti-counterfeiting, and related fields.