Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/4272
標題: 雙電壓控制液態透鏡之研究
Investigation of liquid lens driving adopted dual-voltage control
作者: 陳旗峰
Chen, Chi-Feng
關鍵字: liquid lens;液態透鏡;electrowetting;surface tension;電溼潤效應;表面張力
出版社: 精密工程學系所
引用: [1] 維基百科,光學。 [2] B. Bergea and J. Peseux. "Variable focal lens controlled by an external voltage: An application of electrowetting." Eur. Phys. J. E 3, 159–163 (2000) [3] 柯賢文,表面張力的應用,台灣科技大學,2007。 [4] 原子世界,蓮花效應 ,蓮花效應的原理。 [5] 維基百科,疏水性。 [6] Bohringer, K. F. "Modeling and Controlling Parallel Tasks in Droplet-Based Microfluidic Systems." Computer-Aided Design of Integrated Circuits and Systems, IEEE Transactions on 25(2): 334-344, 2006. [7] 國家實驗研究院,儀器科技研究中心,健康好茶道與茶抗氧化生物晶片。 [8] 電濕潤技術在可攜式液晶顯示器應用產品效能之改善,光電技術 No.16 ,2007。 [9] 細菌感染性疾病DNA快速檢測晶片之研發,國科會基因體醫學國家型科技計畫專題研究計畫。 [10] M.Agarwal, Gunasekaran, R. A., Coane, P. and Varahramyan, K., Polymer-based variable focal length microlens system,” Journal of Micromechanics and Microengineering, 14, pp. 1665-1673, 2004. [11] Chen, J., Wang, W., Fang, J. and Varahramyan, K., “Variable-focusing microlens with microfluidic chip,” Journal of Micromechanics and Microengineering, 14, pp. 675-680, 2004. [12] Chronis, N., Liu, G. L., Jeong, K. H. and Lee, L. P., “Tunable liquid-filled microlens array integrated with microfluidic network,” Optics Express, 11(19), pp.2370-2378, 2003. [13] Kuiper, S. and Hendriks, B. H. W., “Variable-focus liquid lens for miniature cameras,” Applied Physics Letters, 85(7), pp. 1128-1130, 2004. [14] S. W. Seo, S. Han, J. H. Seo, Y. M. Kim, M. S. Kang, N. K. Min, W. B. Choi and M. Y. Sung, “Microelectromechanical-system-based variable-focus liquid lens for capsule endoscopes,” Japanese Journal of Applied Physics, vol. 48, pp. 052404(1)-052404(4), 2009. [15] KANG Ming, YUE Rui-Feng *, WU Jian-Gang, LIU Li-Tian, “EWOD-based Variable-focus Liquid Lens,” IEEE, 1-4244-0161-5, 2006. [16] Choi, Y., Park, J. H., Kim, J. H. and Lee ,S. D., “Fabrication of a focal length variable microlens array based on a nematic liquid crystal,” Optical Materials, 21, pp. 643-646, 2002. [17] Ren, H., Fan, Y. H., Lin, Y. H. and Wu, S. T., “Electronically controlled liquid crystal yields tunable-focal-length lenses,” SPIE’s oemagazine, 4(9), pp. 25-27,2004. [18] L. Saurei, J. Peseux, F. Laune, and B. Berge, “Tunable liquid lens based on electrowetting technology : principle, properties and applications,” Proceedings of the 10th MicroOptics conference, Jena Germany, pp.1-3, 2004 [19] S. Kuiper, and B. H. W. Hendriks, “Variable-focus liquid lens for miniature cameras,” Applied Physics Letters, Vol. 85, pp. 1128-1130,2004 [20] B. Berge, and J. Peseux, “Variable focal lens controlled by an external voltage: An application of electrowetting,” The European Physical Journal E, vol. 3, pp. 159-163, 2000 [21] C. Quilliet, and B. Berge, “Electrowetting : a recent outbreak, ”Current Opinion in Colloid & Interface Science, vol. 6, pp.34-39, 2001 [22] 楊中堯,壓電驅動膜片可變焦液態透鏡之研究,國立中興大學碩士論文,2007。 [23] Yuan-Jen Chang, and Kamran MohseniB, “Fabrication of tapered SU-8 structure and effect of sidewall angle for a variable focus microlens using EWOD,” Sensors and Actuators A 136 (2007) 546–553
摘要: 
本論文在於表述以微製造方法製作液態透鏡,包含透鏡腔體及使用雙電極驅動透鏡機制,以便將來可運用於可攜式數位影像系統。實驗以直徑3mm,厚度2mm之透鏡來做探討,並用施加電壓於腔體側邊及底部,觀察物體影像變化之行為。主要步驟為利用黃光微影製程製作出微結構,並使用UV膠上金屬環和壓克力作為儲存液體的腔體,並用強力膠黏貼上蓋ITO,完成液態透鏡。待透鏡黏結密封之後就可以施加電壓測試,則本研究透鏡曲率的改變是利用電溼潤效應,加入電壓後可使表面張力改變,表面張力的改變會造成液液界面弧度的不同,進而改變焦距。
而本研究之重點在於以往液態透鏡都為單電極驅動,不是底部加電壓就是從側邊加電壓,而本研究則是底部和側邊分別施加電壓,雙電極的施加不但能有較多曲率變化,也可較精準的控制曲率,讓液態透鏡有更好的曲率變化之結果。

This thesis describes a micro-manufacturing method to fabricate liquid lens by using dual-voltage driving, which could be applied to portable digital imaging system. In experiments, a lens with 3 mm diameter and 2 mm thickness is fabricated and investigated with applied voltages on the side and bottom of the lens chamber to observe the adjustable object image behavior. Main process steps are the photolithography process to fabricate micro-structure, assembly both metal rings and acrylic as storage chamber and ITO glass as cover by using by glue. After the lens is sealed, it is biased at different voltages to test lens performance, which study the change of lens curvature due to electrowetting effect, water/Teflon surface with different applied voltages vary the surface tension, which causes different curvatures of the liquid-liquid interface, thus delivers variable focal lengths of lens.
The focus of this study is that dual voltages are applied at the bottom and side electrodes of lens, compared to previous liquid lens with a single-electrode bias, not only the bottom electrode but also from the side electrode. A lens is biased on both bottom and side electrodes, with not only more curvature adjustable range but also better accuracy control of curvature.
URI: http://hdl.handle.net/11455/4272
其他識別: U0005-3008201022142600
Appears in Collections:精密工程研究所

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