Results 21 to 30 of about 37,762 (301)

Optics in Our Time [PDF]

open access: yes, 2016
Optics, Lasers, Photonics, Optical Devices; Quantum Optics; Popular Science in Physics; History and Philosophical Foundations of ...

core   +1 more source

Quantum Optics and Photonics 2021: Book of Abstracts : The 4th International Conference, Riga, 22-23 April 2021

open access: yes, 2021
The conference was supported by ERDF project No.
The 4th International Conference
core   +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

PHOTONICS AND OPTICAL INFORMATICS IN EUROPE: TRENDS OF 2003–2013 [PDF]

open access: yesНаучно-технический вестник информационных технологий, механики и оптики, 2014
Retrospective structure analysis of the European scientific and technological platforms – photonics, nanomaterials and photovoltaics – is represented from the point of view of their structure, interpenetration of subjects and dynamics of the changes ...
I. L. Livshits   +5 more
doaj  

Antireflection of optical anisotropic dielectric metasurfaces

open access: yesScientific Reports, 2023
We propose a hetero-nano-fin structure to further improve the efficiency of Pancharatnam–Berry phase metasurfaces. Two hetero-nano-fin types, MgF2/GaN and MgF2/Nb2O5, were investigated.
Yu-Hsuan Liao   +3 more
doaj   +1 more source

Double-frequency grating shearing interferometer with built-in phase-shifting function for robust multi-level phase retrieval

open access: yesScientific Reports, 2022
In this paper, we propose and demonstrate a novel interferometer and signal process to retrieve two-dimensional signals with multilevel phases. The interferometer is based on a shearing interferometry with double-frequency grating, and phase-shifting ...
Yeh-Wei Yu   +3 more
doaj   +1 more source

Achromatic linear polarization rotators by tandem twisted nematic liquid crystal cells

open access: yesScientific Reports, 2018
An achromatic linear polarization rotator based on a tandem-2ϕ-twisted nematic liquid crystal cell (tandem-2ϕ-TNLC cell, where 2ϕ represents the total twisted angle) is theoretically analyzed and experimentally demonstrated.
Te-Yuan Chung   +4 more
doaj   +1 more source

Active thermal-fuse for stopping blue light leakage of white light-emitting diodes driven by constant current

open access: yesScientific Reports, 2022
In this study, we proposed and demonstrated a circuit design for solving problems related to blue light leakage (e.g., eye damage) when phosphor-converted white light-emitting diodes (pcW-LEDs) overheat.
Ching-Cherng Sun   +6 more
doaj   +1 more source

Occlusion and Deformation Handling Visual Tracking for UAV via Attention-Based Mask Generative Network

open access: yesRemote Sensing, 2022
Although the performance of unmanned aerial vehicle (UAV) tracking has benefited from the successful application of discriminative correlation filters (DCF) and convolutional neural networks (CNNs), UAV tracking under occlusion and deformation remains a ...
Yashuo Bai   +8 more
doaj   +1 more source

Spatial-Coded Phosphor Coating for High-Efficiency White LEDs

open access: yesIEEE Photonics Journal, 2017
In this paper, a new structure of spatial-coded coating phosphor is proposed and effectively benefits the efficiency enhancement in the white light-emitting diodes (LEDs). The spatial-coded phosphor plate contains two subregions.
Ching-Cherng Sun   +7 more
doaj   +1 more source

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