Centro de Tecnologías Físicas, Universitat Politècnica de València, 46022, Spain.
Departamento de Comunicaciones, Universitat Politècnica de València, 46022, Spain.
Ultrasonics. 2019 Nov;99:105967. doi: 10.1016/j.ultras.2019.105967. Epub 2019 Jul 23.
In this work, we demonstrate the application of Cantor fractal lenses in acoustics. The Cantor Zone Plate (CZP), previously introduced in optics, is designed from a conventional Fresnel Zone Plate (FZP) using a binary sequence governed by the distribution of a generalized Cantor set. The CZP maintains its main focus at the same focal distance than its associated FZP, providing a softer multi-foci focusing profile which is very useful in certain ultrasound therapeutic applications. Experimental measurements are in good agreement with the theoretical model, demonstrating that CZPs are suitable for the ultrasound field.
在这项工作中，我们展示了 Cantor 分形透镜在声学中的应用。Cantor 带隙板 (CZP) 以前在光学中引入，是使用由广义 Cantor 集分布控制的二进制序列从传统菲涅耳带隙板 (FZP) 设计的。CZP 在与 FZP 相同的焦距处保持其主焦点，提供更柔和的多焦点聚焦轮廓，在某些超声治疗应用中非常有用。实验测量与理论模型吻合良好，证明 CZPs 适用于超声场。
