Moiré imaging film with fluorescence enhancement effect

Abstract

In recent years, the moiré imaging device has become one of the hot topics in the field of micro optics due to its strikingly visual three-dimensional (3D) effect which can be easily recognized by naked eye. Traditionally, the moiré imaging film is composed of the superposition of a microlens array（MLA）and a micro pattern array (MPA）with high alignment accuracy. By the combination of the nanoimprinting and nanoprinting techniques, we fabricated a moiré imaging film on a large-format substrate characterized by fluorescent enhancement effect under ultraviolet light illumination. By using a novel virtual mask technique, the MPA can contain more information than traditional one. It is worthy to note that the nanostructure is introduced to the MPA to promote the light efficiency of the fluorescent material. A synthetically magnified moiré image with 3D effect is demonstrated. The moiré imaging film has widely potential applications in 3D imaging, optical anti-counterfeiting, packaging, etc.