Results 11 to 20 of about 27,387 (213)

GPS Multipath Analysis Using Fresnel Zones [PDF]

Sensors, 2018
GNSS (Global Navigation Satellite Systems) multipath has been subject to scientific research for decades and although numerous methods and techniques have already been developed to mitigate this effect, it is still one of the accuracy-limiting factors in
Florian Zimmermann, Berit Schmitz, Lasse Klingbeil, Heiner Kuhlmann   +3 more
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Polarization-Independent Metasurface Lens Based on Binary Phase Fresnel Zone Plate [PDF]

Nanomaterials, 2020
Based on the binary phase Fresnel zone plate (FZP), a polarization-independent metasurface lens that is able to focus incident light with any polarization state, including circular, linear, and elliptical polarizations, has been proposed and investigated.
Xing Li, Jing Tang, Jonathan Baine
doaj   +2 more sources

Electrically switchable continuous phase liquid crystal Fresnel zone plate [PDF]

Light: Science & Applications
We present the design, fabrication, and characterization of continuous phase Fresnel zone plates (FZPs) using two-photon polymerization direct laser writing in a polymerizable nematic liquid crystal (LC) confined between glass substrates.
Zhiyu Xu, Camron Nourshargh, Tianxin Wang, Alec Xu, Nathan Spiller, Urban Mur, Martin J. Booth, Steve J. Elston, Stephen M. Morris   +8 more
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Four-Ce:Nd:YAG-rod solar laser with 4.49% conversion efficiency through Fresnel lens [PDF]

Scientific Reports
The development of solar laser systems that combine high efficiency and cost-effectiveness is key to the practical implementation of this renewable technology. This paper presents the outcomes of the assessment of a solar laser prototype performed in the
Hugo Costa, Dawei Liang, Joana Almeida, Bruno D. Tibúrcio, Cláudia R. Vistas   +4 more
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Optical elements for the extreme ultraviolet and soft X-ray range [PDF]

Biuletyn Wojskowej Akademii Technicznej, 2022
The article presents the physical basis and overview of optical elements for the rangeincluding extreme ultraviolet (EUV) and soft X-ray (SXR). The first chapter contains an introductionto the subject under review and physical fundamentals.
Martyna Wardzińska, Przemysław Wachulak   +1 more
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Tunable hard x-ray nanofocusing with Fresnel zone plates fabricated using deep etching. [PDF]

Optica, 2020
Li K, Ali S, Wojcik M, De Andrade V, Huang X, Yan H, Chu YS, Nazaretski E, Pattammattel A, Jacobsen C.   +9 more
europepmc   +2 more sources

The Inverse Fresnel Beam XSP-CDP Stack Imaging in Crosswell Seismic

Frontiers in Earth Science, 2022
In order to overcome the shortcomings of serious arc drawing and low computational efficiency in the crosswell seismic migration method and the problems of the inaccurate velocity model and sparse distribution of reflection points in the traditional ...
Fei-Long Yang, Fei-Long Yang, Fei-Long Yang, Fei-Long Yang, Guang-Ying Ren, Feng-Ming Yao, Chong Zhao   +6 more
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Nonlinear Metasurface Fresnel Zone Plates for Terahertz Generation and Manipulation. [PDF]

Nano Lett, 2019
Minerbi E, Keren-Zur S, Ellenbogen T.
europepmc   +2 more sources

Investigation of Beam Width Shaping of a Ku-band Horn Antenna using a Diffractive Optic Element and an Electromagnetic Wave Absorber

Sakarya Üniversitesi Fen Bilimleri Enstitüsü Dergisi, 2020
The feasibility of beam-shaping of a Ku-Band horn as a transmitting (Tx) antenna by mounting two different versions of lenses which are kind of Fresnel Zone Plates (FZP) is studied.
Ahmet Teber
doaj   +1 more source

Expansion of Image Space in Enhanced-NA Fresnel Holographic Display

Applied Sciences, 2022
The enhanced-NA Fresnel hologram reconstructs a holographic image at a viewing angle larger than the diffraction angle of a hologram pixel. The image space is limited by the bandwidth of a digital hologram.
Byung Gyu Chae
doaj   +1 more source