平面波表示为，波长为632.8nm,方位角可随意设定，A=1. 画出一幅512*512像素的平面波的振幅和相位分布图，并给相应的图像加标题-The plane wave representation, the wavelength is 632.8nm, the azimuth angle can be arbitrarily set, a, B can be set arbitrarily, A=1. to draw a picture of the 512*512 pixel plane w