PVA/glycerol-based lenticular microlens array with tunable focal length depending on electric field polarization effect

PVA/glycerol-based lenticular microlens array with tunable focal length depending on electric field polarization effect
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基于PVA/甘油的透镜状微透镜阵列,其焦距可根据电场偏振效应可调

DOI:
10.1088/1361-665x/ab05e9
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发表时间:
2019-03
影响因子:
4.1
通讯作者:
Liu Tiegen
Liu Tiegen
中科院分区:
材料科学3区
文献类型:
--
作者:
Song Xiaomin;Li Dongyang;Jia Dagong;Sun Yubao;Zhang Hongxia;Liu Tiegen

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增塑聚合物凝胶已成为一种用于制作可变焦距微透镜的新材料。为了探索无毒和无刺激性的凝胶,我们制备了聚乙烯醇(PVA)/甘油凝胶,其对外部直流(DC)电压敏感,并且在施加电场时表现出强的极化效应。由于极化效应,PVA/甘油凝胶像电凝胶一样向阴极弯曲。为了制作微透镜阵列,将PVA/甘油凝胶旋涂在具有金刚石铟锡氧化物电极的玻璃基底上。在外加直流电场作用下,PVA粒子在凝胶膜表面沿余弦波蠕动,从而表现出微透镜阵列的性质。对PVA/甘油基透镜阵列的成像质量和焦距进行了测试实验。我们的微透镜阵列允许可调焦距与较低的驱动电压相比,聚氯乙烯凝胶的微透镜阵列。
Plasticized polymer gel has emerged as a new material for the fabrication of microlenses with variable focal lengths. To explore a non-toxic and non-irritating gel, we prepared a polyvinyl alcohol (PVA)/glycerol gel, which is sensitive to external direct-current (DC) voltage and exhibits a strong polarization effect upon application of an electric field. Due to the polarization effect, PVA/glycerol gel bends toward cathode like the polyelectrolyte gel. To fabricate the microlens array, PVA/glycerol gel was spin-coated on a glass substrate with diamond Indium Tin Oxides electrode. Upon application of the DC electric field, the surface of the gel membrane followed a cosine wave for creeping motion of PVA particles, hence the membrane exhibited the property of a microlens array. The experiments for measuring imaging quality and focal length of PVA/glycerol-based lenticular microlens array are performed. Our microlens array allows tunable focal length with lower driving voltage compared to the microlens array with polyvinyl chloride gel.
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