Results 1 to 10 of about 1,647 (111)

Photopolymer-based volume holographic optical elements: design and possible applications [PDF]

Journal of the European Optical Society-Rapid Publications, 2015
In this paper, Volume Holographic Optical Elements (V-HOEs), such as holographic gratings and spherical lenses, are designed and fabricated by using a prototype of photopolymer.
Bianco G., Ferrara M. A., Borbone F., Roviello A., Striano V., Coppola G.   +5 more
doaj   +3 more sources

Volume Holographic Optical Elements as Solar Concentrators: An Overview

Applied Sciences, 2019
Generally, to reduce the area of a photovoltaic cell, which is typically very expensive, solar concentrators based on a set of mirrors or mechanical structures are used.
Maria Antonietta Ferrara, Valerio Striano, Giuseppe Coppola   +2 more
doaj   +3 more sources

Holographic Optical Lenses Recorded on a Glassy Matrix-Based Photopolymer for Solar Concentrators

Photonics, 2021
Global warming is a very topical issue, therefore the search for new renewable energy sources is considered of fundamental importance. Among these, solar energy offers great possibilities considering that the amount of sunlight hitting the Earth ‘s ...
Maria Antonietta Ferrara, Fabio Borbone, Giuseppe Coppola   +2 more
doaj   +1 more source

Photopolymer materials for volume phase holographic optical elements [PDF]

International Conference on Space Optics — ICSO 2016, 2017
Volume Phase Holographic Gratings (VPHGs) cover a relevant position as dispersing elements in spectrographic instrumentations with low and medium resolution. This is due to their unique properties especially in terms of diffraction efficiency. These devices have to provide dispersion, resolving power, bandwidth and diffraction efficiency according to ...
A. Bianco, T. Fäcke, A. Zanutta, E. Orselli   +3 more
openaire   +1 more source

Optical vortex generation by volume holographic elements with embedded phase singularity: Effects of misalignments [PDF]

Ukrainian Journal of Physical Optics, 2013
Based on the linear theory for optical vortex (OV) formation in volume holographic elements (HE) with embedded phase singularity (A. Bekshaev et al., Opt. Commun. 285 (2012) 4005), we analyze theoretically the OV-beams obtained when the incident Gaussian beam axis deviates from the optical axis of the HE.
A Bekshaev, S Sviridova, A Popov, A Rimashevsky, A Tyurin   +4 more
openaire   +1 more source

Geometric and physical configurations of meta‐atoms for advanced metasurface holography

InfoMat, 2021
Metasurfaces consisting of subwavelength structures, so‐called meta‐atoms, have steadily attracted considerable attention for advanced holography due to their advantages in terms of high‐resolution holographic images, large field of view, and compact ...
Joohoon Kim, Younghwan Yang, Trevon Badloe, Inki Kim, Gwanho Yoon, Junsuk Rho   +5 more
doaj   +1 more source

Polygraphic Laser Tomography System and Algorithms for Computer Digital Reconstruction of the bulk Structure of Polymeric Materials

Технологія і техніка друкарства, 2022
Our scientific article presents materials that illuminate a new experimental method of polarization tomography of the polycrystalline structure of polymer phase-inhomogeneous layers.
Олександр Григорович Ушенко, Ірина Василівна Солтис, Олександр Володимирович Дуболазов, Микола Миколайович Матиміш, Олександр Генадійович Лінючев   +4 more
doaj   +1 more source

LigHTS: Biomimetic Hydrogel Photo‐Fabrication for Imaging‐Based Ultra‐High‐Throughput Screening [PDF]

Advanced science
LigHTS removes a key bottleneck for ultra‐high‐throughput screening (UHTS) by enabling biomimetic hydrogel microenvironments to be manufactured directly in standard multiwell plates. A single, collimated UV exposure with formulation‐tuned light penetration patterns an entire plate with UHTS‐grade uniformity (<20% CV), producing structured GelMA films ...
Enrico A, Rigolli S, Zimmermann J, Pezzotti M, Torchia E, Di Sante M, Auricchio F, Pasqualini F.   +7 more
europepmc   +2 more sources

Reconfigurable Light Field Generation With Hologram-Enhanced Multicore Fibers. [PDF]

Nanophotonics
A novel metafiber platform enables reconfigurable generation of structured light patterns directly at the end of a multicore optical fiber. A 3D‐printed hologram maps individual fiber cores onto predefined image elements, allowing programmable pattern synthesis through selective core excitation.
Khosravi M, Zbinden L, Fischer B, Lorenz A, Kim J, Leitel R, Tao Z, Rockstuhl C, Sturges T, Nyman M, Schmidt MA.   +10 more
europepmc   +2 more sources

Phase response of volume diffraction gratings [PDF]

EPJ Web of Conferences
Volume holography has long been a key area of research, with numerous applications in the field of photonics. In recent years, it has regained significant attention due to the ability of volume holograms to operate under off-axis conditions, enabling ...
Neipp Cristian, Sirvent Joan, Bravo Juan Carlos, Puerto Daniel, Francés Jorge, Gallego Sergi   +5 more
doaj   +1 more source