[1] [1] SWANSON G J, VELDKAMP W B. Infrared applications of diffractive optical elements［C］. SPIE, 1988, 883: 155-162.

[2] [2] IGNACIO M, CLAUDIO L, ANDRES M, et al. Modulation light efficiency of diffractive lenses displayed in a restricted phase-mostly modulation display［J］. Appl Opt, 2004, 43(34): 6278-6284.

[3] [3] HAYES R A, FEENSTRA B J. Video-speed electronic paper based on electrowetting［J］. Nature, 2003, 425(6956): 383-385.

[4] [4] BERGE B, PESEUX J. Variable focal lens controlled by an external voltage: an application of electrowetting［J］. Eur Phys J E 2000, 3(2): 159-163.

[5] [5] LEE J, MOON H, FOWLER J, et al. Electrowetting and electrowetting-on-dielectric for microscale liquid handling［J］. Sens Actuators A, 2002, 95(2-3): 259-268.

[6] [6] HENDRIKS B H W, KUIPER S, van AS M A J, et al. Variable liquid lenses for electronic products［C］. SPIE, 2006, 6034: 603402.

[7] [7] QUINN A, SEDEV R, RALSTON J. Contact angle saturation in electrowetting［J］. J Phys Chem B, 2005, 109(13): 6268-6275.

[8] [8] MUGELE F, KLINGNER A, BUEHRLE J, et al. Electrowetting: a convenient way to switchable wettability patterns［J］. J Phys: Condens Matter, 2005, 17(9): S559-S576.

[9] [9] PENG R, CHEN J, ZHU C, et al. Design of a zoom lens without motorized optical elements［J］. Opt Express, 2007, 15(11): 6664-6669.

[10] [10] PENG R, CHEN J, ZHUANG S. Electrowetting-actuated zoom lens with spherical-interface liquid lenses［J］. JOSA A, 2008, 25(11): 2644-2650.