Results 61 to 70 of about 4,729 (265)

Verification of ESPI Stress Analysis by Means Of FEM [PDF]

Transactions of the VŠB-Technical University of Ostrava, Mechanical Series, 2013
The main goal of this paper is verification of accuracy of ESPI strain sensor Dantec dynamics Q-100. ESPI is the digital holographic interferometry method for measuring small displacements and deformations.
Luboš PEČENKA, Matúš KALINA, Radim HALAMA   +2 more
doaj   +1 more source

Conformal Reconfigurable Intelligent Surfaces: A Cylindrical Geometry Perspective

Advanced Electronic Materials, EarlyView.
Cylindrical reconfigurable intelligent surfaces are explored for low‐complexity beam steering using one‐bit meta‐atoms. A multi‐level modeling approach, including optimization‐based synthesis, demonstrates that even minimal hardware can support directive scattering.
Filippo Pepe, Ivan Iudice, Giuseppe Castaldi, Marco Di Renzo, Vincenzo Galdi   +4 more
wiley   +1 more source

Terahertz Channel Modeling, Estimation and Localization in RIS‐Assisted Systems

Advanced Electronic Materials, EarlyView.
Reconfigurable intelligent surfaces have become a recent intensive research focus. Based on practical applications, channel strategies for RIS‐assisted terahertz wireless communication systems are categorized into three different types: channel modeling, channel estimation, and channel localization.
Hongjing Wang, Weipeng Wang, Xuan Cong, Shiyu Wang, Gao Li, Sen Gong, Lin Huang, Hongxin Zeng, Yaxin Zhang, Ziqiang Yang   +9 more
wiley   +1 more source

Probing three-dimensional mesoscopic interfacial structures in a single view using multibeam X-ray coherent surface scattering and holography imaging

Nature Communications, 2023
Visualizing surface-supported and buried planar mesoscale structures, such as nanoelectronics, ultrathin-film quantum dots, photovoltaics, and heterogeneous catalysts, often requires high-resolution X-ray imaging and scattering.
Miaoqi Chu, Zhang Jiang, Michael Wojcik, Tao Sun, Michael Sprung, Jin Wang   +5 more
doaj   +1 more source

A Compact Electronic Speckle Pattern Interferometry System using a Photopolymer Reflection Holographic Optical Element

, 2005
A simple and compact electronic speckle pattern interferometry system using a reflection holographic optical element is presented. The reflection holographic optical element is recorded on an acrylamide based photopolymer formulated and prepared at the ...
Martin, Suzanne, Reddy, Guntaka Tulasi Sridhar, Jallapuram, Raghavendra, Toal, Vincent, Naydenova, Izabela, Mintova, Svetlana   +5 more
core   +1 more source

Recent Advances in Programmable Metasurfaces and Meta‐Devices

Advanced Electronic Materials, EarlyView.
Programmable metasurfaces enable various novel functionalities by dynamically tuning electromagnetic wavefronts. This article provides a comprehensive review of recent advances in microwave and terahertz programmable metasurfaces, covering electrical, thermal, optical, and mechanical control mechanisms.
Linda Shao, Chong He, Nan Wang, Liming Si, Weiren Zhu   +4 more
wiley   +1 more source

Design and Analysis of Laser to Fibre Coupling System Using Holographic Optical Element

382-390This paper focuses on design of cost effective, light – weight holographic coupler to couple laser light to optical fibre with reasonably appreciable diffraction efficiency.
Kumar Singh, Ajay, Lal Yadav, Hira, Yadav, Ajay   +2 more
core   +1 more source

A surface velocimeter based on a holographic optical element and semiconductor components

, 1996
A new implementation of a laser time-of-flight velocimeter is described. The system is based on a novel combination of a holographic optical element, a semiconductor laser and a double-semiconductor detector.
Hanson, Steen Grüner, Lindvold, L., Lading, L.   +2 more
core   +1 more source

Machine Learning‐Assisted Design and Performance Prediction of a Compact Dual‐Band Polarization‐Insensitive THz Metamaterial Absorber for Skin‐Cancer‐Related Refractive‐Index Sensing

Advanced Electronic Materials, EarlyView.
A compact QASRR‐based THz metamaterial absorber enables polarization‐insensitive dual‐band absorption and skin‐cancer‐related refractive‐index sensing through measurable resonance shifts. Field, surface‐current, and circuit analyses clarify the dual‐resonance mechanism, while StackNet‐assisted prediction accurately estimates the simulated absorption ...
Md. Murad Kabir Nipun, S. M. Rifatur Rana, Md. Golam Morshed, Imrose Jahan, F. A. Sabbir Ahamed, Md. Jahedul Islam   +5 more
wiley   +1 more source

Autostereoscopic transparent display using a wedge light guide and a holographic optical element: implementation and results

, 2019
International audienceWe present a novel transparent autostereoscopic display consisting of laser picoprojectors, a wedge light guide, and a holographic optical element.
Crespel, Thomas, Granier, Xavier, Travis, Adrian, Reuter, Patrick, Gentet, Yves   +4 more
core   +1 more source