Abstract
An optical film integrating microlens array (MLAs) and 3D micro-graphics is an important way to achieve the naked-eye 3D display effect. The 3D micro-graphics is traditionally generated by the micro-nano imprint technology based on precision engraving mold, which leads to high production cost and low production efficiency, and thus restricts the rapid response to production tasks and large-scale popularization and application. In this study, a process scheme for large-scale printing of 3D micro-graphics using UV offset printing based on presensitized (PS) plate was proposed, matching with the MLAs fabricated by micro-nano imprint process to achieve naked-eye 3D display effect. We used the laser confocal microscope to systematically measure and analyze the geometric and optical performance of the fabricated MLAs in terms of height, curvature radius, center distance, spacing, focal length, and numerical aperture, and evaluated the influence of the publishing resolution of the PS plate on the display effect of 3D micro-graphics. The printing quality and display effect of 3D micro-graphics were further improved by adjusting process parameters such as printing speed and printing pressure. The results of the current study demonstrate that the combined application of micro-nano imprint technology based on precision mold and UV offset printing technology based on PS plate can achieve an excellent naked-eye 3D display effect in 360° all angles, which is efficient, cost-saving, and highly flexible.
Highlights
Microlens array (MLAs), as an important micro-optics component, has been widely used in optical communications, optical coupling [1,2], optical fluids [3], micro-optical sensors [1], lighting [1,4], imaging, and display [1,5,6]
Micro-nano imprint present, micro-nano imprint based on precision engraving mold is a popular method of 3D microbased on precision engraving mold is a popular method of 3D micro-graphics transfer in the worldwide, graphics transfer in the worldwide, which is universally adopted by the internationally renowned which is universally adopted by the internationally renowned 3D printing company, including American
Process based on PS plate was used for the first time to transfer and replicate designed 3D micromicro-graphics, matching with the MLAs fabricated by micro-nano imprint process, to achieve the graphics, matching with the MLAs fabricated by micro-nano imprint process, to achieve the nakednaked-eye 3D display effect
Summary
Microlens array (MLAs), as an important micro-optics component, has been widely used in optical communications, optical coupling [1,2], optical fluids [3], micro-optical sensors [1], lighting [1,4], imaging, and display [1,5,6]. 3D printing technology based on MLAs can achieve naked-eye 3D effect in 360◦ all angles without any special observation equipment or skills, which can significantly improve the information display level, interest, and anti-counterfeiting performance of printed. As a typical micro-nano processing technology, micro-nano imprint is seen as a common method. As a typical micro-nano processing technology, micro-nano imprint is seen as a common to replicate micro-nano structures and MLAs among considerable MLAs fabrication methods. After the fabrication of the optical film with MLAs film with MLAs is completed, the designed 3D micro-graphics needs to be transferred on the optical is completed, the designed 3D micro-graphics needs to be transferred on the optical film substrate and film substrate and matched with the MLAs to achieve the naked-eye 3D display effect. Micro-nano imprint present, micro-nano imprint based on precision engraving mold is a popular method of 3D microbased on precision engraving mold is a popular method of 3D micro-graphics transfer in the worldwide, graphics transfer in the worldwide, which is universally adopted by the internationally renowned which is universally adopted by the internationally renowned 3D printing company, including American
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