Bifocal Ultrasound Focusing Using Bi-Fresnel Zone Plate Lenses
Open Access
- 27 January 2020
- Vol. 20 (3), 705
- https://doi.org/10.3390/s20030705
Abstract
In this work, we present a bifocal Fresnel zone plate (BiFZP) capable of generating focusing profiles with two different foci. The performance of the BiFZP is demonstrated in the ultrasound domain, with a very good agreement between the experimental measurements and the finite element method (FEM) simulations. This lens becomes an appealing alternative to other dual-focusing lenses, in which the foci location can only be set at a limited range of positions, such as M-bonacci zone plates. Moreover, the variation of the operating frequency has also been analyzed, providing an additional dynamic control parameter in this type of lenses.This publication has 33 references indexed in Scilit:
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