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There was a problem in current cell gap measurement of liquid crystal (LC) lens. A method was proposed by adopting interference of linearly polarized light in this paper. It was claimed that the incident light was monochromatic light with a uniform distribution of light intensity. The polarization axis of the analyzer was perpendicular or parallel to the polarization axis of polarizer. The difference between light and dark interference fringes was the biggest when the angle was equal to 45° between the rubbing direction of alignment layer in the LC lens and the polarization axis of polarizer. The cell gap of LC lens can be calculated by the transmittance of LC lens center and the max transmittance of its other locations. The tilt angle was equal to the pre-tilt angle of LC at the LC lens center. This method was simple and reliable. Its accuracy is relatively high due to the use of optical interference principle.
[1] Wang F, Zhao X, Yong Y, Fang Z L, Yuan X C 2012 Acta Phys. Si. 61 084212 (in Chinese) [王芳, 赵星, 杨勇, 方志良, 袁小聪 2012 61 084212]
[2] Sato S 1979 Jpn. J. Appl. Phys. 18 1679
[3] Berreman D W 1980 U.S. Patent 4190330
[4] Zheng Z G, Ma J, Song J, Liu Y G, Hu L F, Xuan L 2007 Acta Phys. Sin. 56 15 (in Chinese) [郑致刚, 马骥, 宋静, 刘永刚, 胡立发, 宣丽 2007 56 15]
[5] Yang P B, Cao L G, Hu W, Zhu Y Q, Guo Q, Yang X B 2008 Acta Phys. Sin. 57 285 (in Chinese) [杨平保, 曹龙贵, 胡巍, 朱叶青, 郭旗, 杨湘波 2008 57 285]
[6] Zheng Z G, Li W C, Liu Y G, Xuan L 2008 Acta Phys. Sin. 57 7344 (in Chinese) [郑致刚, 李文萃, 刘永刚, 宣丽 2008 57 7344]
[7] Yin J L, Huang X G, Liu S H, Hu S J 2006 Acta Phys. Sin. 55 5268 (in Chinese) [殷建玲, 黄旭光, 刘颂豪, 胡社军 2006 55 5268]
[8] Ding H B, Pang W N, Liu Y B, Shang R C 2005 Acta Phys. Sin. 54 4097 (in Chinese) [丁海兵, 庞文宁, 刘义保, 尚仁成 2005 54 4097]
[9] Ren H W, Fan Y H, Gauza S, Wu S T 2004 Appl. Phys. Lett. 84 4789
[10] Nose T, Masuda S, Sato S 1992 Jpn. J. Appl. Phys. 31 1643
[11] Ye M, Wang B, Sato S 2004 AO 43 6407
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[1] Wang F, Zhao X, Yong Y, Fang Z L, Yuan X C 2012 Acta Phys. Si. 61 084212 (in Chinese) [王芳, 赵星, 杨勇, 方志良, 袁小聪 2012 61 084212]
[2] Sato S 1979 Jpn. J. Appl. Phys. 18 1679
[3] Berreman D W 1980 U.S. Patent 4190330
[4] Zheng Z G, Ma J, Song J, Liu Y G, Hu L F, Xuan L 2007 Acta Phys. Sin. 56 15 (in Chinese) [郑致刚, 马骥, 宋静, 刘永刚, 胡立发, 宣丽 2007 56 15]
[5] Yang P B, Cao L G, Hu W, Zhu Y Q, Guo Q, Yang X B 2008 Acta Phys. Sin. 57 285 (in Chinese) [杨平保, 曹龙贵, 胡巍, 朱叶青, 郭旗, 杨湘波 2008 57 285]
[6] Zheng Z G, Li W C, Liu Y G, Xuan L 2008 Acta Phys. Sin. 57 7344 (in Chinese) [郑致刚, 李文萃, 刘永刚, 宣丽 2008 57 7344]
[7] Yin J L, Huang X G, Liu S H, Hu S J 2006 Acta Phys. Sin. 55 5268 (in Chinese) [殷建玲, 黄旭光, 刘颂豪, 胡社军 2006 55 5268]
[8] Ding H B, Pang W N, Liu Y B, Shang R C 2005 Acta Phys. Sin. 54 4097 (in Chinese) [丁海兵, 庞文宁, 刘义保, 尚仁成 2005 54 4097]
[9] Ren H W, Fan Y H, Gauza S, Wu S T 2004 Appl. Phys. Lett. 84 4789
[10] Nose T, Masuda S, Sato S 1992 Jpn. J. Appl. Phys. 31 1643
[11] Ye M, Wang B, Sato S 2004 AO 43 6407
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