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Researchers from the Singapore University of Technology and Design (SUTD) and Southern University of Science and Technology (SUSTech) in China have proposed a fabrication technique that integrates oscillation-assisted digital light processing (DLP) 3D printing with grayscale UV exposure to render an ultrafast and flexible fabrication of microlens arrays with optical surface smoothness.
Optically smooth microlens array is fabricated by an oscillation-assisted 3D-printing method. Owing to the mechanical oscillation applied on the projection lens, jagged surface induced by the gaps between discrete pixels is successfully eliminated to render a low surface roughness of 1 nm, which endows the printed microlenses with high resolution….READ MORE