【摘要】 本文对圆锥形凹百聚束声透镜的优化设计作定量的初步研究。应用瑞利－索末菲衍射公式对其不同面形参数下的声场进行了数值计算，详细地分析了透镜的面形参数与其声场分布特征间的关系，根据在声场中尽可能长的距离范围内，获得声束宽度较小，旁瓣水平适中的聚束声束的要求，提出了透镜的优化面形参数。更多还原

【Abstract】 In this paper, the opt im urn design of shape parameters of conical lens is studied, the acoustic fields of the conical lens are calculated numerically for various shape parameters by means of Rayleigh-sommerfeld Diffraction formula. the relations between the shape parameters and the acoustic field characteristics are investigated, the optimum shape parameters of the conical lens are deterimined to get a narrow acoustic beam-width over a longer axial range while the sidelobe level is moderate.更多还原