Application of Phase-Reversal Fresnel Zone Plates for High-Resolution Robotic Ultrasonic Non-Destructive Evaluation [PDF]
Sensors, 2021 Nowadays the development of automated inspection systems based on six degrees of freedom robotic manipulators is a highly relevant topic in ultrasonic non-destructive testing. One of the issues associated with such development is the problem of acquiring
Dmitry O. Dolmatov +4 more
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Transient Analysis of Fresnel Zone Plates for Ultrasound Focusing Applications [PDF]
Sensors, 2020 Fresnel Zone Plates are planar lenses that can be used to focus ultrasound beams. This kind of acoustic lenses can play a key role in the resolution of ultrasonic NDT systems.
Sergio Pérez-López +4 more
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Analysis of Predistortion Techniques on Fresnel Zone Plates in Ultrasound Applications [PDF]
Sensors, 2021 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 ...
José Miguel Fuster +3 more
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High efficiency and scalable fabrication of fresnel zone plates using holographic femtosecond pulses [PDF]
Nanophotonics, 2022 To meet the growing demand for photonic integration and device miniaturization, planar diffractive Fresnel zone plates (FZPs) are widely applied in integrated optical systems.
Wang Zhipeng +8 more
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Fabrication of Terahertz Fresnel Zone Plates via Ultraprecision Mechanical Processing [PDF]
MicromachinesThis study proposes a new fabrication process for terahertz Fresnel zone plates on high-resistivity silicon substrates. It involves ion implantation surface modification, ultra-precision diamond turning, and magnetron sputtering, followed by polishing ...
Meng Chen, Jinshi Wang, Fengzhou Fang
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Analysis of Fresnel Zone Plates Focusing Dependence on Operating Frequency [PDF]
Sensors, 2017 The focusing properties of Fresnel Zone Plates (FZPs) against frequency are analyzed in this work. It is shown that the FZP focal length depends almost linearly on the operating frequency.
José Miguel Fuster +4 more
doaj +2 more sources
Numerical Fresnel models of Fresnel zone plates for plane wave at angle of incidence [PDF]
Scientific ReportsDiffractive optical elements (DOEs) are increasingly used in electro-optical systems due to their design flexibility, which offers advantages over refractive optics.
Ahmet Ünal
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Application of Phase-Reversal Fresnel Zone Plates for Improving The Elevation Resolution in Ultrasonic Testing with Phased Arrays [PDF]
Sensors, 2019 Currently, phased arrays have found wide application in ultrasonic nondestructive testing.
Dmitry O. Dolmatov +5 more
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Optimization of Soft X-Ray Fresnel Zone Plate Fabrication Through Joint Electron Beam Lithography and Cryo-Etching Techniques [PDF]
NanomaterialsThe ability to manufacture complex 3D structures with nanometer-scale resolution, such as Fresnel Zone Plates (FZPs), is crucial to achieve state-of-the-art control in X-ray sources for use in a diverse range of cutting-edge applications.
Maha Labani +5 more
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Design and Structure of a Non-Coaxial Multi-Focal Composite Fresnel Acoustic Lens for Synergistic Ultrasound Stimulation of Multiple Brain Regions [PDF]
SensorsTranscranial focused ultrasound (TcFUS) neuromodulation is hindered by skull-induced acoustic limitations. To enable synergistic multi-region brain stimulation, we designed non-coaxial multi-focal composite Fresnel acoustic lenses, including an ...
Ruiqi Wu +6 more
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