Results 51 to 60 of about 659,213 (221)
Generalized lock-in detection applied to lens-less digital holographic interferometry
, 2016 International audienceA simple, lens-less, holographic microscope is built based on “Generalized Lock-in detection”, as an alternative to phase-shifting interferometry.
Bruyant, Aurélien +3 more
core +2 more sources
Holographic Wide-Angle System for Deformation Measurement of Extended Structures
Optics, 2022 We introduce a holographic wide angle system that combines the accuracy of a long focal length with the extended field of view of a wide angle lens. To accomplish this, we use a computer-generated hologram (CGH) in front of the lens to diffract light ...
Flavio Guerra +2 more
doaj +1 more source
Chern-Simons invariants from ensemble averages
Journal of High Energy Physics, 2021 We discuss ensemble averages of two-dimensional conformal field theories associated with an arbitrary indefinite lattice with integral quadratic form Q.
Meer Ashwinkumar +4 more
doaj +1 more source
Arbitrary focusing lens by holographic metasurface
Photonics Research, 2015 In this paper, an ultrathin metalens has been proposed based on a holographic metasurface that consists of elongated apertures in 40 nm gold film, which exhibit intriguing properties such as on- and off-axis focusing and also can concentrate light into multiple, discrete spots for circularly polarized incident lights.
Rongzhen Li +8 more
openaire +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 +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 +9 more
wiley +1 more source
A Fast Computer-Generated Holographic Method for VR and AR Near-Eye 3D Display
Applied Sciences, 2019 A fast computer-generated holographic method with multiple projection images for a near-eye VR (Virtual Reality) and AR (Augmented Reality) 3D display is proposed.
Xin Yang, HongBo Zhang, Qiong-Hua Wang
doaj +1 more source
Scientific Reports, 2022 Interferenceless coded aperture correlation holography (I-COACH) is an incoherent digital holographic technique with lateral and axial resolution similar to a regular lens-based imaging system.
Nitin Dubey, Joseph Rosen
doaj +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 +4 more
wiley +1 more source
A human erythrocytes hologram dataset for learning-based model training
Data in BriefThis manuscript presents a paired dataset with experimental holograms and their corresponding reconstructed phase maps of human red blood cells (RBCs). The holographic images were recorded using an off-axis telecentric Digital Holographic Microscope (DHM)
Raul Castañeda +2 more
doaj +1 more source