液体变焦透镜的ewod特性和电场仿真分析-ewod characteristics and electric field simulation analysis of liquid zoom lens.docxVIP

ABSTRACTMicro-fluidic liquid zoom lens based on EWOD is easy to realize the miniaturization and array scale, widely used in the field of optical communications, digital product, bio-medical testing. The main subject is to realize the numerical simulation and analysis of the characteristics of EWOD and of the electric field distribution of the inner core structure. This paper first introduces the development of micro-fluidic technology and dielectric wetting, followed by experimental results to analyze the characteristics of the dielectric (EWOD) with conductive silicon rubber. Because of small size (millimeters) of liquid zoom lens, artificial measurement of the electric field is more difficult. So we use COMSOL software to establish the appropriate model to make a concrete analysis of the internal electric field distribution, mainly to study the electric field distribution on the sidewall of the liquid lens insulating layer. Specific activities are included as the following:Verify the EWOD characteristics of the conductive silicon rubber chip. Collect the droplet images with different voltages on the conductive silicon rubber, using the image processing functions of MATLAB software to extract the droplet boundary and calculate the contact angle of droplets; by least squares to fit the relationship curve between contact angle and voltage to verify the EWOD characteristics.Establish the appropriate model by using the COMSOL software (multi-physics analysis software), changing angle of the core structure, the voltage, and radius parameters to observe the electric field distribution in the inner core.Keywords:Liquid zoom lens; EWOD; Contact angle measurement; Electric field simulation目录摘要...................................................................................................................................................IABSTRACT...........................................................................................................................