phase encoding短语¹³¹⁶²⁰⁺³ 基本例句 相位编码 In connection with characteristics of spherical wave gene and function of phase mask, one random phase encoding techniques are proposed with spherical wave based on 4f system. 加密时,利用球面波的相位因子替代第一块相位掩模对待加密图像的空间信息作扰乱。 cnki