丝网印刷制备大面积柔性微透镜阵列的研究
首发时间:2017-11-14
摘要:大面积柔性微透镜阵列的制备和光学特性调控是柔性三维显示领域亟需解决的关键技术和理论难题。结合丝网印刷工艺和高黏度UV树脂的流体动力学过程调控,实现大面积、高性能柔性微透镜阵列的可控制备,并研究基板表面亲疏水性和UV树脂静置变形过程参数对微透镜阵列形貌和光学特性的影响。实验结果表明,基板接触角与树脂外扩程度成反比,当网版开孔半径增大,基板接触角减小,得到的微透镜阵列的占空比就越大。在接触角为72.86 的柔性PET基板上制备的微透镜阵列,高度为51.7±0.85μm,焦距为8698.2μm,且表现出良好的光学聚焦性能。
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Fabrication of large-scale flexible micro-lens arrays using screen printing
Abstract:The fabrication of large-scale flexible micro-lens arrays and regulation of its optical performances remain the technical and theoretical problems in the flexible stereoscopic display that desiderate to solve. In this paper, we combined the screen printing and the controllable hydrodynamics process of UV resin with high viscosity, to realize large-scale, high performance flexible micro-lens arrays. Meanwhile, the effects of the substrate wettability and the deformation process of UV resin on the morphology and optical performances were investigated. It is shown that the resin contact angle of the substrate was inversely proportional to the spreading of the UV resin. When the open apertures of the screen increases, the resin contact angle of the substrate decreases, the aspect ratio of the micro-lens arrays increases. The micro-lens arrays fabricated on the flexible PET substrate with resin contact angle of 72.86° exhibites good optical performances, with the average height of 51.7±0.85μm and focus length of 8698.2μm.
Keywords: information display screen printing micro-lens array integral imaging 3D display contact angle
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