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利用矩阵方法分析了液晶的旋光效应,导出了液晶旋光的矩阵表示.利用JG-3型连续可调谐磁场仪搭建实验装置,红外1350nm激光器做光源,测量了偏振光通过磁场作用下BL-009型向列相液晶的旋光角,详细分析了磁场对液晶旋光性能的影响.通过实验测试,对液晶的阈值磁场强度进行了讨论,同时对实验结果进行了理论上的分析,得出了液晶旋光角随磁场与液晶盒表面夹角而变化的结论,验证了液晶分子轴的旋转方向与磁场的方向无关,这为更好的研究液晶的特性以及液晶器件的设计具有重要的参考价值.
Using the matrix method, the optical rotation effect of the liquid crystal was analyzed, and the matrix representation of the liquid crystal rotation was derived. The experimental apparatus was built by JG-3 continuous tunable magnetic field instrument and the infrared 1350nm laser was used as the light source. The influence of magnetic field on the optical rotation performance of liquid crystal is analyzed in detail.The threshold magnetic field strength of liquid crystal is discussed through experimental tests and the experimental results are theoretically analyzed.The experimental results show that the rotation angle With the change of the angle between the magnetic field and the surface of the liquid crystal cell, it is verified that the rotation direction of the liquid crystal molecular axis has no relation with the direction of the magnetic field, which is of great reference value for better studying the characteristics of the liquid crystal and the design of the liquid crystal device.