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华北理工大学 理学院,河北 唐山 063210
[ "郭澳运(1999—),女,河北易县人,大学本科,主要从事应用物理医学方面的研究。E-mail:guoaoyun1220@163.com" ]
[ "常春蕊(1982—),女,河北抚宁人,博士,副教授,2011年于中国科学院苏州纳米技术与纳米仿生研究所获得博士学位,主要从事碳纳米管的液晶行为及器件方面的研究。E-mail:changchunrui@ncst.edu.cn" ]
收稿日期:2022-02-16,
修回日期:2022-03-26,
纸质出版日期:2022-07-05
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郭澳运, 金淋浩, 吕占钊, 等. 偏振片偏振化方向的确定及在液晶显示中的检验[J]. 液晶与显示, 2022,37(7):825-831.
Ao-yun GUO, Lin-hao JIN, Zhan-zhao LÜ, et al. Determination of polarization direction of polarizer and its test in liquid crystal display[J]. Chinese journal of liquid crystals and displays, 2022, 37(7): 825-831.
郭澳运, 金淋浩, 吕占钊, 等. 偏振片偏振化方向的确定及在液晶显示中的检验[J]. 液晶与显示, 2022,37(7):825-831. DOI: 10.37188/CJLCD.2022-0056.
Ao-yun GUO, Lin-hao JIN, Zhan-zhao LÜ, et al. Determination of polarization direction of polarizer and its test in liquid crystal display[J]. Chinese journal of liquid crystals and displays, 2022, 37(7): 825-831. DOI: 10.37188/CJLCD.2022-0056.
偏振片是一重要的光学器件,通常实验室所用偏振片的偏振化方向未知。为了得到精确的偏振片的偏振化方向,提出了一种基于布儒斯特定律测定偏振片偏振化方向的方法,并将已测定偏振化方向的偏振片置于液晶光电测试系统的光路中,测得透光量随偏振片偏振化方向与液晶盒前摩擦取向方向夹角的变化关系。实验结果表明:偏振片偏振化方向和液晶盒前摩擦取向方向夹角为45°时,透光量达到最大,并以此角测试了透光量随施加电压、时间的变化且给予了理论分析,验证了基于布儒斯特定律可以精确测定偏振片的偏振化方向,从而依据此研究,搭建了一个物理实验光路来测定未知偏振片的偏振化方向,并通过已知的光电测试系统给予验证,便于偏振片在需要精确测定其偏振化方向的领域得到更好的应用。
Polarizer is an important optical device. Generally, the polarization direction of polarizer used in laboratory is unknown. In order to obtain the accurate polarization direction of the polarizer, a method for measuring the polarization direction of the polarizer based on Brewster's law is proposed. The polarizer with the measured polarization direction is placed in the optical path of the liquid crystal photoelectric test system, and the variation of the light transmission with the angle between the polarization direction of the polarizer and the front friction orientation direction of the liquid crystal cell is measured. The experimental results show that when the included angle between the polarization direction of the polarizer and the front friction orientation direction of the liquid crystal cell is 45°, the light transmission reaches the maximum. At this angle, the change of the light transmission with the applied voltage and time is tested and analyzed theoretically. It is verified that the polarization direction of the polarizer can be accurately measured based on Brewster's law. Then a physical experimental optical path is built to measure the polarization direction of the unknown polarizer, which is verified by the known photoelectric test system, so that the polarizer can be better applied in the field where the polarization direction needs to be accurately measured.
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