为了获取线性易控的可变延迟器，研制了基于SLC-7607A平行向列相液晶的可变延迟器。简要阐述了液晶可变延迟器工作原理和研制工艺过程，采用基于Stokes参量的可变延迟器的相位延迟测量新方法，在入射光波长为632.8nm 时，测出了可变延迟器的相位延迟与控制电压关系特征曲线，测量结果具有很好的重复性。结果表明，电压在1V～2.7V区间，可变延迟器具有线性易控的特点，并拟合出它们的线性关系式。该实验结果对液晶可变延迟器的研制、测量和使用都具有一定的参考价值。

In order to get linearly-controlled variable retarder, a liquid crystal variable retarder(LCVR) was developed based on SLC-7607A parallel nematic liquid crystal. Its operating principle and technology was described. New method measuring retardation of the variable retarder based on Stokes parameters was put forward, and the characteristic curve describing relationship of retardation and voltage was well reproducibly drawn. Experimental result indicates that retardation is inversely proportional to the applied voltage ranging from 1V to 2.7V, and the fitted linear relation is achieved. The obtained result attributes to the development, measurement and application of LCVRs.