Study of Profile Manipulation in Liquid Lens

• Main Authors: Meng-chao Peng, 彭孟超
• Other Authors: Tsung-hsun Yang
• Format: Others
• Language: zh-TW
• Published: 2008
• Online Access: http://ndltd.ncl.edu.tw/handle/8rhx27

碩士 === 國立中央大學 === 光電科學研究所 === 96 === The fabrication of the oldest liquid lens can be traced to the 17th century.The liquid lens has been developed many kinds of fabrication method as fluidic pressure, thermal effect, dielectrophoresis and electrowetting so far. Nowadays,the liquid lens based on electrowetting has been commercialization. The applied electrical voltage can be used to tune the curvature of lens for the tunable-focus.For the time being, the liquid lens has become of very high competition. In this work, the electric field of AC signal has been explored to investigate the change of curvature of liquid lens. In the analysis, the result liquid curvature is highly dependent on the amplitude and the frequency of the applied electric voltage. It is found that the lower the amplitude of the electric voltage is applied on the liquid lens, the less the frequency variation on the curvature is. While the higher voltage is applied, the changes of the drop curvature become irregular as frequency increasing. When the frequency is above 3 kHz, the drop curvature will be almost steady and independent of the applied electric voltage change.. Furthermore, the AC signal induces the drops to vibrate. The vibration modes are also exploited in the amplitude-frequency phase diagram. It is expected to drive the liquid lens by AC signals with much more efficiency.