基于偏光干涉理论用3种不同的波长(405 nm、635 nm、904 nm)的激光在3种不同温度条件(25℃、40℃、60℃)下测量、分析了向列相液晶相位延迟器的双折射率色散特性,并由柯西色散公式拟合得到了在上述3种温度条件下的色散方程.结果表明,该方法可以有效地测量、分析向列相液晶的双折射率色散特性.根据该液晶在25℃温度条件下的色散方程推算出了589 nm波长处的双折射率为0.268,该结果与液晶数据表提供的数值0.257的偏差值为4.28％.该研究为液晶双折射色散特性的研究提供了一个新的方法,同时也为液晶可调相位延迟器件的设计与应用提供了依据和参考.
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