Design, Modeling And Simulation Of Microfluidic Optical Device Based On Electrowetting

The optical system consists of the conventional optical devices are mostly mechanical,which will not only increase volume, system complexity and cost, but also introduce performance problems like slow response speed, poor reliability, low accuracy, high energy consumption. The optical element based on electrowetting effect has become a hot topic. It has the following advantages like simple manufacturing process, large aperture, fast response speed, low power and low voltage operation to achieve the wide-angle change(which can be used with wide steering). This paper propose a novel liquid optical lens based on migration of optical axis and a prism system based on electrowetting effect, as follows is the main work:Firstly, describeing the research status and progress of electrowetting technology and electrowetting device, introduced the terms and basic principle associated with electrowetting.Secondly, describes the working principle of variable-optical axis optical lens, and made a theoretical derivation about the relationship between the focal length and the voltage, between the offset angle and the voltage.At the same time, We also give analysis about the migration of optical axis when different voltages are applied to four components of square cube and how to focus the object. Finally, using Comsol to controlling the curvature of the interface of the two liquids, thus tune the focal length and adjust optical axis to focus.Thridly, describeing the working principle of liquid optical prism based on electrowetting effect, and the beam deflection capability liquid optical prism were calculated; Its distinguishing feature is that COMSOL software is employed to simulate the evolution of the shape of the two liquid interfaces when four voltages are applied on the side-wall in three-dimensional perspective. An optical physics field module is added to analyze optical property of the liquid prism, which depicts deflection of the parallel beam emitting through the different fluid. The results show that it succeeds in controlling beam tracking and steering as traditional optical prism under certain voltage combinations.