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15 February 2012 Facile and flexible fabrication of gapless microlens arrays using a femtosecond laser microfabrication and replication process
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Abstract
We demonstrate a facile and flexible method to fabricate close-packed microlens arrays (MLAs). Glass molding templates with concave structures are produced by a femtosecond (fs)-laser point-by-point exposures followed by a chemical treatment, and convex MLAs are subsequently replicated on Poly(methyl methacrylate) [PMMA] using a hot embossing system. As an example, a microlens array (MLA) with 60-μm rectangular-shaped spherical microlenses is fabricated. Optical performances of the MLAs, such as focusing and imaging properties are tested, and the results demonstrate the uniformity and smooth surfaces of the MLA. We also demonstrated that the shape and alignment of the arrays could be controlled by different parameters.
© (2012) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Hewei Liu, Feng Chen, Qing Yang, Yang Hu, Chao Shan, Shengguan He, Jinhai Si, and Xun Hou "Facile and flexible fabrication of gapless microlens arrays using a femtosecond laser microfabrication and replication process", Proc. SPIE 8243, Laser Applications in Microelectronic and Optoelectronic Manufacturing (LAMOM) XVII, 82430Z (15 February 2012); https://doi.org/10.1117/12.905942
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