Ultrafast Three-Dimensional Printing of Optically Smooth Microlens Arrays by Oscillation-Assisted Digital Light Processing

• DOI: 10.1021/acsami.9b14692
• Publication Date: 2019-10-07T13:25:55Z
• Authors: Chao Yuan; Kavin Kowsari; Sahil Panjwani; Zaichun Chen; Dong Wang; Biao Zhang; Colin Ju-Xiang Ng; Pablo Valdivia y ...; Qi Ge
• Keywords: Microlens; Digital Light Processing; Digital micromirror device; Oscillation (cell signaling)

A microlens array has become an important micro-optics device in various applications. Compared with traditional manufacturing approaches, digital light processing (DLP)-based printing enables fabrication of complex three-dimensional (3D) geometries and is a possible approach for arrays. However, the nature 3D objects by stacking successive 2D patterns formed discrete pixels leads to coarse surface roughness makes DLP-based unsuccessful fabricating optical components. Here, we report oscillation-assisted An optically smooth (about 1 nm roughness) achieved mechanical oscillation that eliminates jagged pixels, 1-3 s single grayscale ultraviolet (UV) exposure removes staircase effect. Moreover, computationally designed UV allow us fabricate microlenses profiles. The proposed paves way print components high quality, fast speed, vast flexibility.