Polyvinyl chloride gels microlens array with a well-controlled curvature obtained by solvent evaporation under DC electric fields

Published on 2020-09-16T21:27:40Z (GMT) by
In this paper, polyvinyl chloride (PVC) gels microlens arrays (MLAs) with controllable curvatures were prepared by evaporation of the solvent under DC electric fields. In order to obtain these arrays, PVC gels solution was first injected into the cofferdam of a ring array patterned electrode substrate. Upon polarization under DC electric field, the electric charge injected from the cathode was carried by the plasticizers towards the anode to accumulate on its surface. After complete evaporation of the solvent, the PVC gels formed stable MLAs. The focal length of the formed MLAs obtained after evaporation of the 100 μL PVC gels solvent under 30 V DC field was 8.68 mm. The focal length of the as-obtained PVC gels-based MLAs can be well-controlled by merely tuning the strength of the electric field or by changing the volume of PVC gels solution. Thus, it can be concluded that the proposed methodology looks very promising for future fabrication of MLAs with uniform size in larger areas.

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Xu, Peiwen; Xu, Miao; Lu, Hongbo; Qiu, Longzhen (2020): Polyvinyl chloride gels microlens array with a well-controlled curvature obtained by solvent evaporation under DC electric fields. The Optical Society. Collection. https://doi.org/10.6084/m9.figshare.c.5100227.v2