二维光场分析（球面波）。编程实现单色球面波在给定二维平面上的构建，并用相位表达式直接计算其相位，与通过复光场得到的相位相比较，观察相位包裹（缠绕）现象。与平行光相干涉，观察干涉光强分布。-2 d light field analysis (spherical wave).Programming monochromatic spherical wave in a given the construction of a 2 d plane, and the phase expression directly calculate the phase, compared with the phase is obtained by complex light field, observation phase package (coil).Observe with parallel light interference, the interference light intensity distribution.