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Sensors 2018, 18(8), 2604; https://doi.org/10.3390/s18082604

Design of Binary-Sequence Zone Plates in High Wavelength Domains

1
Departamento de Comunicaciones, Universitat Politècnica de València, 46022 Valencia, Spain
2
Centro de Tecnologías Físicas, Universitat Politècnica de València, 46022 Valencia, Spain
3
Departamento de Física Aplicada, Universitat Politècnica de València, 46022 Valencia, Spain
*
Author to whom correspondence should be addressed.
Received: 9 July 2018 / Revised: 24 July 2018 / Accepted: 7 August 2018 / Published: 9 August 2018
(This article belongs to the Section Physical Sensors)
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Abstract

The design of zone plates is an important topic in many areas of physics, such as optics, X-rays, microwaves or ultrasonics. In this paper, a zone plate design method, which provides high flexibility in the shaping of the focusing profile, is analyzed. This flexibility is achieved through the use of binary sequences that produce zone plates with different properties and applications. It is shown that this binary-sequence method works properly at low wavelengths, but requires a modification term to work accurately in high wavelength domains. This additional term extends this powerful design method to any wavelength. Simulation results show acoustic focusing profiles for Fresnel, Fibonacci and Cantor zone plates operating at a wavelength of 1.5 mm without any distortion. View Full-Text
Keywords: zone plates; focusing; lenses; binary sequences zone plates; focusing; lenses; binary sequences
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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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Fuster, J.M.; Pérez-López, S.; Candelas, P.; Rubio, C. Design of Binary-Sequence Zone Plates in High Wavelength Domains. Sensors 2018, 18, 2604.

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