Imaging Properties of Modified Fresnel Zone Plates

1984 ◽  
Vol 31 (4) ◽  
pp. 403-413 ◽  
Author(s):  
M.J. Simpson ◽  
A.G. Michette
Keyword(s):  
Fresnel Zone ◽  
Fresnel Zone Plates ◽  
Zone Plates ◽  
Imaging Properties

scholarly journals Analysis of Predistortion Techniques on Fresnel Zone Plates in Ultrasound Applications

Sensors ◽  
2021 ◽  
Vol 21 (15) ◽  
pp. 5066
Author(s):  
José Miguel Fuster ◽  
Sergio Pérez-López ◽  
Francisco Belmar ◽  
Pilar Candelas
Keyword(s):  
Intensity Distribution ◽  
Fresnel Zone ◽  
Focal Depth ◽  
Acoustic Intensity ◽  
Fresnel Zone Plates ◽  
Therapeutic Applications ◽  
Zone Plates ◽  
Ultrasound Applications

In this work, we analyze the effect of predistortion techniques on the focusing profile of Fresnel Zone Plates (FZPs) in ultrasound applications. This novel predistortion method is based on either increasing or decreasing the width of some of the FZP Fresnel rings by a certain amount. We investigate how the magnitude of the predistortion, as well as the number and location of the predistorted rings, influences the lens focusing profile. This focusing profile can be affected in different ways depending on the area of the lens where the predistortion is applied. It is shown that when the inner area of the lens, closer to its center, is predistorted, this technique allows the control of the focal depth at the main focus. However, when the predistortion is applied to an area farther from the center of the lens, the acoustic intensity distribution among the main focus and the closest adjacent secondary foci can be tailored at a certain degree. This predistortion technique shows great potential and can be used to control, modify and shape the FZP focusing profile in both industrial and therapeutic applications.

APD-based x-ray imaging telescope using Fresnel zone plates for extremely high spatial resolution

2005 ◽  
Author(s):  
Michael R. Squillante ◽  
Richard A. Myers ◽  
Mitchell Woodring ◽  
James F. Christian ◽  
Frank Robertson ◽  
...  
Keyword(s):  
Spatial Resolution ◽  
High Spatial Resolution ◽  
Fresnel Zone ◽  
Fresnel Zone Plates ◽  
X Ray ◽  
Zone Plates ◽  
X Ray Imaging ◽  
Imaging Telescope

Fresnel zone plates for two wavelengths

1995 ◽  
Author(s):  
Eugene O. Curatu ◽  
Roxana N. Radvan ◽  
Roxana Savastru
Keyword(s):  
Fresnel Zone ◽  
Fresnel Zone Plates ◽  
Zone Plates

Diffraction phenomena inside thick Fresnel zone plates

Radio Science ◽  
1996 ◽  
Vol 31 (6) ◽  
pp. 1815-1822 ◽  
Author(s):  
Yuri V. Kopylov ◽  
Alexei V. Popov ◽  
Alexander V. Vinogradov
Keyword(s):  
Fresnel Zone ◽  
Fresnel Zone Plates ◽  
Zone Plates

Investigation on the Preparation of High Precision Multilayer X-ray Fresnel Zone Plates Based on Atomic Layer Deposition Technology

2021 ◽  
Vol 50 (1) ◽  
pp. 156-164
Author(s):  
吴鹿杰 Lujie WU ◽  
文庆涛 Qingtao WEN ◽  
高雅增 Yazeng GAO ◽  
卢维尔 Weier LU ◽  
夏洋 Yang XIA ◽  
...  
Keyword(s):  
Atomic Layer Deposition ◽  
High Precision ◽  
Fresnel Zone ◽  
Atomic Layer ◽  
Fresnel Zone Plates ◽  
X Ray ◽  
Zone Plates ◽  
Layer Deposition ◽  
Deposition Technology
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