菲涅尔波带片设计Matlab程序代码 输入波长 Lambda = 632.8nm，设计波带片波长f = 1000mm，k=100 绘制菲涅尔波带片图样 -Fresnel zone plate designed Matlab program codes enter the wavelength Lambda = 632.8nm the design zone plate wavelength f = 1000mm, k = 100 draw a Fresnel zone pla