大学物理 ›› 2018, Vol. 37 ›› Issue (2): 68-70.doi: 10.16854 /j.cnki.1000-0712.170247
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禹佳希
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YU Jia-xi
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摘要： 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.
关键词: 超声透镜, 菲涅尔波带片, 声波聚焦
Abstract: 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.
Key words: ultrasonic lens, Fresnel zone-plate, focused acoustic wave
禹佳希. 衍射超声透镜[J]. 大学物理, 2018, 37(2): 68-70.
YU Jia-xi. Diffractive ultrasonic lens[J]. College Physics, 2018, 37(2): 68-70.
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https://dxwl.bnu.edu.cn/CN/Y2018/V37/I2/68
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