scholarly journals Bifocal Ultrasound Focusing Using Bi-Fresnel Zone Plate Lenses

Sensors ◽  
2020 ◽  
Vol 20 (3) ◽  
pp. 705 ◽  
Author(s):  
Sergio Pérez-López ◽  
José Miguel Fuster ◽  
Pilar Candelas ◽  
Daniel Tarrazó-Serrano ◽  
Sergio Castiñeira-Ibáñez ◽  
...  
Keyword(s):  
Control Parameter ◽  
Fresnel Zone ◽  
Dynamic Control ◽  
Limited Range ◽  
Zone Plate ◽  
Fresnel Zone Plate ◽  
The Finite Element Method ◽  
Fem Simulations ◽  
Fresnel Zone Plate Lenses ◽  
Good Agreement

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.

scholarly journals MILLIMETER-WAVE OFFSET FRESNEL ZONE PLATE LENSES CHARACTERIZATION

2014 ◽  
Vol 54 ◽  
pp. 125-131 ◽  
Author(s):  
German Leon ◽  
Luis F. Herran ◽  
Max O. Munoz ◽  
Fernando Las-Heras ◽  
Yang Hao
Keyword(s):  
Millimeter Wave ◽  
Fresnel Zone ◽  
Zone Plate ◽  
Fresnel Zone Plate ◽  
Fresnel Zone Plate Lenses

Improved zoning rule for designing square Fresnel zone plate lenses

2006 ◽  
Vol 49 (2) ◽  
pp. 276-278 ◽  
Author(s):  
I. V. Minin ◽  
O. V. Minin ◽  
A. Petosa ◽  
S. Thirakoune
Keyword(s):  
Fresnel Zone ◽  
Zone Plate ◽  
Fresnel Zone Plate ◽  
Fresnel Zone Plate Lenses

Thin Fresnel zone plate lenses for focusing underwater sound

2015 ◽  
Vol 107 (1) ◽  
pp. 014103 ◽  
Author(s):  
David C. Calvo ◽  
Abel L. Thangawng ◽  
Michael Nicholas ◽  
Christopher N. Layman
Keyword(s):  
Fresnel Zone ◽  
Zone Plate ◽  
Fresnel Zone Plate ◽  
Underwater Sound ◽  
Fresnel Zone Plate Lenses

Scalar FDTD Analysis of Fresnel Zone-Plate Lenses

2006 ◽  
Vol 27 (1) ◽  
Author(s):  
Keh-Yi Lee ◽  
Ming-Huei Shyu ◽  
Jia-Bao Huang ◽  
Shin-Shong Jeng ◽  
Juinn-Shien Lo ◽  
...  
Keyword(s):  
Fresnel Zone ◽  
Zone Plate ◽  
Fresnel Zone Plate ◽  
Fresnel Zone Plate Lenses

scholarly journals Graphene nanoribbon based plasmonic Fresnel zone plate lenses

RSC Advances ◽  
2017 ◽  
Vol 7 (27) ◽  
pp. 16594-16601 ◽  
Author(s):  
Sunan Deng ◽  
Haider Butt ◽  
Kyle Jiang ◽  
Bruno Dlubak ◽  
Piran R. Kidambi ◽  
...  
Keyword(s):  
Fresnel Zone ◽  
Graphene Nanoribbon ◽  
Zone Plate ◽  
Fresnel Zone Plate ◽  
Fresnel Zone Plate Lenses

A graphene-based metamaterial lens is theoretically proposed by combining plasmonic nanoribbons with Fresnel Zone Plate (FZP) architecture to realize wavelength-selective and tunable lensing.

scholarly journals Acoustic Focusing Enhancement In Fresnel Zone Plate Lenses

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Daniel Tarrazó-Serrano ◽  
Sergio Pérez-López ◽  
Pilar Candelas ◽  
Antonio Uris ◽  
Constanza Rubio
Keyword(s):  
Fresnel Zone ◽  
Zone Plate ◽  
Fresnel Zone Plate ◽  
Acoustic Focusing ◽  
Fresnel Zone Plate Lenses

Millimeter-Wave Fresnel Zone Plate Lens with new technological process

2016 ◽  
Vol 9 (4) ◽  
pp. 939-944 ◽  
Author(s):  
Antoine Jouade ◽  
Jonathan Bor ◽  
Mohamed Himdi ◽  
Olivier Lafond
Keyword(s):  
Technological Process ◽  
Fresnel Zone ◽  
Low Cost ◽  
Zone Plate ◽  
Fresnel Zone Plate ◽  
W Band ◽  
Measurement Results ◽  
Loss Efficiency ◽  
Dielectric Lenses ◽  
Good Agreement

Fresnel Zone Plate lens (FZPL) antennas working in the V and W band are reported in this paper with half and quarter phase correction respectively. A low cost and straightforward technological process is used to manufacture the dielectric lenses using only one foam material where the dielectric constant is controlled. Simulation and measurement results are in good agreement that confirms the viability of such a process to fabricate inhomogeneous structures. Good loss efficiency of 73 and 55% are obtained at 60 and 85 GHz respectively with the two different FZPL designs.

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