A microfluidic system is designed to fabricate polymer dispersed liquid crystal microspheres, whose shape, surface smoothness, and size are controlled. A microlens array (MLA) is constructed by the assembly of the monodispersed microspheres. In the MLA, each microsphere acts as a separate imaging unit. As the liquid crystal (LC) used is a mixed liquid crystal that contain photoresponsive 4‐butyl‐4‐methoxyazobenzene, the imaging capability and light transportation of the MLA can be reversibly controlled by light irradiation.
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Xiong et al. (2009) studied this question.
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