Comments on “Focusing Characteristics of Curvilinear Half-Open Fresnel Zone Plate Lenses: Plane Wave Illumination”

2006 ◽  
Vol 54 (9) ◽  
pp. 2692-2692 ◽  
Author(s):  
I. Minin ◽  
O. Minin
Keyword(s):  
Plane Wave ◽  
Fresnel Zone ◽  
Zone Plate ◽  
Fresnel Zone Plate ◽  
Fresnel Zone Plate Lenses

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.

X-ray Fourier transform holography by amplitude-division-type Fresnel zone plate interferometer

2018 ◽  
Vol 25 (1) ◽  
pp. 241-247 ◽  
Author(s):  
Minas Balyan ◽  
Levon Haroutunyan
Keyword(s):  
Fourier Transform ◽  
Plane Wave ◽  
Fresnel Zone ◽  
Spherical Wave ◽  
Zone Plate ◽  
Fresnel Zone Plate ◽  
Focal Distance ◽  
X Ray ◽  
Wave Forms ◽  
The Fourier Transform

A two-block X-ray Fresnel zone plate system forms two-beams – a plane wave and a spherical wave – which interfere at the focal distance of the virtual source of the spherical wave. An object placed in the path of the plane wave forms an object wave and the spherical wave is the reference wave. The recorded intensity distribution is the Fourier transform hologram of the object. Analytical and numerical calculations show the possibilities of this scheme to record the hologram and reconstruct the object image. Examples of recording holograms of a one-dimensional cosine-like grating and a two-dimensional grid object as well as reconstruction of the images are considered.

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
Sign in / Sign up

Export Citation Format

Share Document