以基尔霍夫衍射理论和菲涅尔波带片理论为原理，设计制作了一个衍射超声透镜，实验达到声波聚焦放大效果，理 论模拟准确预言实验结果.改变透镜的物距D 和透镜环数N 对比声场，发现后者是影响一维声场分布的主要因素.

Based on Kirchhoff diffraction theory and Fresnel zone-plate theory，an ultrasonic lens is designed and produced. This lens successfully focused acoustic wave in the experiments，while simulations precisely　described experiments' results. When the distance between lens and source ( D) or number of lens' rings ( N) is changed，the 1D acoustic distribution illustrated that the later is a more magnificent variance.