基于1/4波片法，提出了相位延迟的二维分布测试方法。完成了液晶光楔及光寻址液晶空间光调制器（SLM）的二维相位分布测试，得到了两种液晶电光器件的二维相位分布特性的测试结果。编写程序计算得到液晶光楔二维相位分布特性曲线，结果表明：随着测试电压的增大，液晶光楔的顶角θ增大。同理，编写程序计算作出SLM的二维相位等高线图并分析二维相位分布规律。

Based on the Senamont method, a method of testing the two-dimensional (2D) distribution of phase delay is presented. The 2D distribution of phase delay of liquid crystal optical wedge and OA-LC-SLM is measured.The results we have measured is reported. The 2D phase distribution characteristic curve of the liquid crystal optical wedge is calculated by writting a program.The results show that the apex angle of the liquid crystal optical wedge adds when the testing voltage increasing. In the same way, the 2D phase contour map of the OA-LC-SLM is calculated. The 2D phase distribution of the OA-LC-SLM is analyzed.