Results 11 to 20 of about 26,334 (245)

Development and Testing of a Dual-Wavelength Sensitive Photopolymer Layer for Applications in Stacking of HOE Lenses

open access: yesApplied Sciences, 2021
Diffractive optical elements (DOEs) have been in development for many years and are an exciting technology with the capability to re-direct light, using diffraction rather than refraction.
Sanjay Keshri   +5 more
doaj   +1 more source

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

open access: yesJournal 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.   +5 more
doaj   +1 more source

Multilayer Smart Holographic Label with Integrated RFID for Product Security and Monitoring

open access: yesMicromachines, 2023
Counterfeiting presents a major economic problem and an important risk for the public health and safety of individuals and countries. To make the counterfeiting process more difficult, and to ensure efficient authentication, a solution would be to attach
Cătălin Pârvulescu   +4 more
doaj   +1 more source

Metasurface-Based Holographic Display With All-Dielectric Meta-Axilens

open access: yesIEEE Photonics Journal, 2021
In a classical metasurface-based holographic display system, a clear holographic reconstruction image can be obtained only in the back-focal-plane of the lens. However, when the receiving plane deviates from the focal plane, the reconstructed holographic
Chuan Shen   +4 more
doaj   +1 more source

Verification of Polarization Matching on the Hologram Recording Plane for the Implementation of an Optimized Digital Hologram Printing System

open access: yesFrontiers in Physics, 2022
Conventional studies on digital hologram printer have mainly been conducted on image generation and reconstruction such as multi-view image generation method, computer-generated hologram (CGH) and a method of displaying a wave-front for a 3D object ...
Leehwan Hwang   +6 more
doaj   +1 more source

Multiplexed Holographic Combiner with Extended Eye Box Fabricated by Wave Front Printing

open access: yesPhotonics, 2022
We present an array-based volume holographic optical element (vHOE) recorded as an optical combiner for novel display applications such as smart glasses.
Tobias Wilm   +3 more
doaj   +1 more source

Augmented reality and virtual reality displays: emerging technologies and future perspectives

open access: yesLight: Science & Applications, 2021
Emerging holographic optical elements and lithography-based devices are enhancing the performances of augmented reality and virtual reality displays with glasses-like form factor.
Jianghao Xiong   +4 more
doaj   +1 more source

Development of holographic printed HOE recording technology with VHG-based FOV analysis for waveguide-type NED system

open access: yesFrontiers in Physics, 2023
We propose a holographic printing–recording technology for near-eye display through volume holographic grating analysis in hologram recording and reconstruction.
Leehwan Hwang, Seunghyun Lee
doaj   +1 more source

Improving the Holographic Recording Characteristics of a Water-Resistant Photosensitive Sol–Gel for Use in Volume Holographic Optical Elements

open access: yesPhotonics, 2022
Continual improvements to holographic recording materials make the development of volume holographic optical elements increasingly more attainable for applications where highly efficient, lightweight diffractive optical elements can replace conventional ...
Brian Rogers   +5 more
doaj   +1 more source

Volume Holographic Optical Elements as Solar Concentrators: An Overview

open access: yesApplied 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   +2 more
doaj   +1 more source

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