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Appl. Sci. 2018, 8(8), 1389; https://doi.org/10.3390/app8081389

Polyadic Cantor Fractal Ultrasonic Lenses: Design and Characterization

1
Departamento de Física Aplicada, Universitat Politècnica de València, Camí de Vera s/n, 46022 València, Spain
2
Centro de Tecnologías Físicas, Universitat Politècnica de València, Camí de Vera s/n, 46022 València, Spain
3
ETSI de Telecomunicación, Universitat Politècnica de València, Camí de Vera s/n, 46022 València, Spain
*
Author to whom correspondence should be addressed.
Received: 5 July 2018 / Revised: 9 August 2018 / Accepted: 15 August 2018 / Published: 17 August 2018
(This article belongs to the Section Acoustics and Vibrations)
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Abstract

Traditional acoustic lenses modulate the ultrasonic beam due to their curved surfaces and the refractive material of which they are made. In this work, a different type of acoustic lens, based on Polyadic Cantor Fractals (PCF), is presented and thoroughly analyzed. These new Polyadic Cantor Fractal Lenses (PCFLs) are completely flat and easy to build, and they present interesting modulation capabilities over the acoustic profile. The dependence of the focusing profile on the PCFL design parameters is fully characterized, and it is shown that certain design parameters provide a dynamic control, which is critical in many medical applications such as thermal ablation of tumors. View Full-Text
Keywords: fractal lenses; diffraction; polyadic Cantor fractal; ultrasonics fractal lenses; diffraction; polyadic Cantor fractal; ultrasonics
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Castiñeira-Ibáñez, S.; Tarrazó-Serrano, D.; Fuster, J.M.; Candelas, P.; Rubio, C. Polyadic Cantor Fractal Ultrasonic Lenses: Design and Characterization. Appl. Sci. 2018, 8, 1389.

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