Design and Analysis of Novel Four-Quadrant Double Liquid Lens Based on EWOD

Abstract:

A novel double liquid lens based on Electrowetting-On-Dielectric (EWOD) is presented and analyzed. The special construction is that the lens was divided into four quadrants. The particular fabrication process is presented to achieve the structure. It was proved that the lens not only expressed the electric zoom character but also shifted focal point away from optical axis. It also achieved an infinite focal length under zero electric field. The paper presented the relationship between the focus length and applied voltage, also gave the association between focus length and the applied voltage from 0V to 80V. We analyzed how the optical axis shifted according to the voltage difference between quadrants, furthermore, explained the new function that the focus object was away from center of lens.

• Periodical: Advanced Materials Research (Volumes 403-408)
• Pages: 4388-4397
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.403-408.4388
• Online since: November 2011
• Authors: Xiao Hu, Jiu Li, Jin Feng Liu, Zi Qiang Huang
• Keywords: Double Liquid Lens, EWOD, Infinite Focal Length, Optical Device, Shift of Optical Axis, Variable-Focus Lens

References

[1] S. Sato, Liquid-crystal lens-cells with variable focal length, Jpn. J. Appl. Phys, 1979, 18, 1679～1684.

DOI: 10.1143/jjap.18.1679

[2] D. Y. Zhang, V. Lien, Y. Berdichevsky, J. Choi, and Y. H. Lo, Fluidic adaptive lens with high focal length tenability,. Appl. Phys. Lett. 2003, 82, 3171-3172.

DOI: 10.1063/1.1573337

[3] Lippmann M G, Relations entre les phénomènes electriques et capillaries, Ann Chim Phys. 1875, 5(11): 494～549.

[4] Zhu Cheng, Peng Runlin, Chen Jiabi, Double liquid lens based on electrowetting, COLLEGE PHYSICS, 2007, 26 (6): 57 ～62.

[5] Moran P M, Dharmatilleke S, Khaw A H, Fluidic lenses with variable focal length, ApplPhys Lett, 2006, 88: 041120.

DOI: 10.1063/1.2168245

[6] Kuiper S , Hendriks B H W, Variable-focus liquid lens for miniature cameras., Appl Phys Lett, 2004, 85: 1128.

DOI: 10.1063/1.1779954

[7] Kang Ming, Ou Yangfan, Wu Jiangan, Sun Kaige, Yue Ruifeng, Liu Litian, Meniscus Pinned Variable-Focus Liquid Lens Based on Electrowetting-on-Dielectric, CHINESE JOURNAL OF SENSORS AND ACTUATORS, 2008. 4, Vol. 21 No. 4.

DOI: 10.1109/nems.2007.352035

[8] T. Young, An Essay on t he Cohesion of Fluids, London: Philos. Trans. R. Soc, 1805, 95: 65～87.

[9] B. Berge, J. Peseux, Variable focal lens cont rolled by an external voltage: an application of electrowetting, Eur. Phys. J. E. 2000, 3: 159～163.

DOI: 10.1007/s101890070029

[10] S. Kuiper, B. H. W. Hendriks, Variable-focus liquid lens for miniature cameras, Appl. Phys. Lett, 2004, 85 (7): 1128.

DOI: 10.1063/1.1779954

[11] Shen Jinxia, Peng Runling, Chen Jiabi, Analysis on properties of the double- liquid zoom lens based on electrowetting, OPTICAL INSTRUMENTS, 2007. 8, Vol. 29. No. 4.