Chinese Optics Letters, 2010, 8 (5): 508, Published Online: May. 11, 2010
Microlens arrays prepared via colloidal microsphere templating Download: 658次
微透镜阵列 模板法 胶体晶体 220.3620 Lens system design 230.4000 Microstructure fabrication 110.3000 Image quality assessment 080.3630 Lenses
Abstract
A simple and efficient templating method in combination with hot embossing technique is developed for fabricating large-area two-dimensional (2D) microlens arrays (MLAs) with uniform shape. By utilizing a modified microchannel method, a 2D large-area hexagonal close-packed (HCP) array of silica colloidal microspheres is prepared and serves as a template in the following hot embossing treatment to create a polycarbonate (PC) microcavity array. Then, with the obtained PC microcavity structure serving as a mold, a hot embossing process is applied to finally achieve a polymethylmethacrylate (PMMA) MLA. The effect of annealing time during the mold preparation process on the dimensions and shapes of the prepared microlens is investigated. The imaging performances of the prepared PC concave microcavities and PMMA convex microlenses are characterized by carrying out projection experiments. Our method provides a rapid and low cost approach to prepare large-area MLAs.
Feng Zhao, Mingwei Zhu, Peng Zhan. Microlens arrays prepared via colloidal microsphere templating[J]. Chinese Optics Letters, 2010, 8(5): 508.