scholarly journals Further improvement of the light efficiency of LCDs via the asymmetric reflection of metallic nanowire gratings

2020 ◽  
Vol 10 (4) ◽  
pp. 962
Author(s):  
Zhicheng Ye ◽  
Jun Zheng
Keyword(s):  
Asymmetric Reflection ◽  
Light Efficiency

scholarly journals Enhancing the Optical Efficiency of Near-Eye Displays with Liquid Crystal Optics

Crystals ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 107
Author(s):  
Tao Zhan ◽  
En-Lin Hsiang ◽  
Kun Li ◽  
Shin-Tson Wu
Keyword(s):  
Virtual Reality ◽  
Liquid Crystal ◽  
High Efficiency ◽  
Berry Phase ◽  
Optical Element ◽  
Liquid Crystal Polymer ◽  
Proof Of Concept ◽  
Optical Efficiency ◽  
Crystal Polymer ◽  
Light Efficiency

We demonstrate a light efficient virtual reality (VR) near-eye display (NED) design based on a directional display panel and a diffractive deflection film (DDF). The DDF was essentially a high-efficiency Pancharatnam-Berry phase optical element made of liquid crystal polymer. The essence of this design is directing most of the display light into the eyebox. The proposed method is applicable for both catadioptric and dioptric VR lenses. A proof-of-concept experiment was conducted with off-the-shelf optical parts, where the light efficiency was enhanced by more than 2 times.

scholarly journals Bianisotropic metasurfaces: physics and applications

Nanophotonics ◽  
2018 ◽  
Vol 7 (6) ◽  
pp. 1069-1094 ◽  
Author(s):  
Viktar S. Asadchy ◽  
Ana Díaz-Rubio ◽  
Sergei A. Tretyakov
Keyword(s):  
State Of The Art ◽  
Surface Current ◽  
Magnetic Surface ◽  
Magnetic Polarization ◽  
Research Directions ◽  
Magnetic Current ◽  
Asymmetric Reflection ◽  
Composite Layers ◽  
Electric And Magnetic Fields

AbstractMetasurfaces as optically thin composite layers can be modeled as electric and magnetic surface current sheets flowing in the layer volume in the metasurface plane. In the most general linear metasurface, the electric surface current can be induced by both incident electric and magnetic fields. Likewise, magnetic polarization and magnetic current can be induced also by external electric field. Metasurfaces which exhibit magnetoelectric coupling are called bianisotropic metasurfaces. In this review, we explain the role of bianisotropic properties in realizing various metasurface devices and overview the state-of-the-art of research in this field. Interestingly, engineered bianisotropic response is seen to be required for realization of many key field transformations, such as anomalous refraction, asymmetric reflection, polarization transformation, isolation, and more. Moreover, we summarize previously reported findings on uniform and gradient bianisotropic metasurfaces and envision novel and prospective research directions in this field.

Determination of light efficiency of stilbene scintillators and their application to in-core spectrometry of fast neutrons

1982 ◽  
Vol 200 (2-3) ◽  
pp. 397-402 ◽  
Author(s):  
Dietmar Albert ◽  
Uta Brückner ◽  
Wolfgang Hansen ◽  
Wolfhard Vogel
Keyword(s):  
Fast Neutrons ◽  
Light Efficiency

Resonant metasurface with tunable asymmetric reflection

2018 ◽  
Vol 113 (9) ◽  
pp. 094103 ◽  
Author(s):  
Dmitry Filonov ◽  
Vitali Kozlov ◽  
Andrey Shmidt ◽  
Ben Z. Steinberg ◽  
Pavel Ginzburg
Keyword(s):  
Asymmetric Reflection

Photodegradation of (E)- and (Z)-Endoxifen in water by ultraviolet light: Efficiency, kinetics, by-products, and toxicity assessment

2020 ◽  
Vol 171 ◽  
pp. 115451
Author(s):  
Marina Ariño Martin ◽  
Jayaraman Sivaguru ◽  
John McEvoy ◽  
Prinpida Sonthiphand ◽  
Andre Delorme ◽  
...  
Keyword(s):  
Ultraviolet Light ◽  
Toxicity Assessment ◽  
By Products ◽  
Light Efficiency

Optical Systems for Spectroscopic Telescopes

1969 ◽  
Vol 1 (6) ◽  
pp. 291-293 ◽  
Author(s):  
T. Dunham
Keyword(s):  
Polar Axis ◽  
Optical Systems ◽  
Fourier Spectroscopy ◽  
Low Resolution ◽  
Primary Mirror ◽  
Fabry Perot ◽  
Light Efficiency ◽  
The Ideal

Astronomical spectrographs are usually mounted at one of three focal positions on a reflecting telescope: (1) the Newtonian focus, at the top of the telescope tube, with only one reflection from the primary mirror, where the spectrograph must be small and light, and designed for low resolution on faint objects; (2) the Cassegrain focus, behind the cell of the primary mirror, with a total of two reflections, where the spectrograph can be appreciably larger, to give intermediate resolution; and (3) the coude focus, at a fixed location below the end of the polar axis, with three, four or five reflections, where there is no limit to the size of the instrument, and where resolution is limited only by the brightness of the object and the light efficiency of the system. This is the ideal location for image tubes, Fabry-Perot interferometers, and equipment for Fourier spectroscopy.

Analysis of the Use of Reflectors and Reflective Surfaces for Increasing the Light Efficiency of LEDs Based on AlGaInP Heterostructures

2019 ◽  
Vol 942 ◽  
pp. 77-86
Author(s):  
Alexander Gradoboev ◽  
Ksenia Orlova ◽  
Anastasiya V. Simonova
Keyword(s):  
Quantum Dots ◽  
Silicon Carbide ◽  
Quantum Wells ◽  
Gallium Phosphide ◽  
Bragg Reflectors ◽  
Technological Solution ◽  
Emission Power ◽  
Base Substrate ◽  
Light Efficiency ◽  
Reflective Surfaces

The most common technological solution for increasing the light efficiency of the LEDs based upon AlGaInP heterostructures are discussed in the paper. The creation of LEDs with the inclusion of quantum wells and quantum dots in the active region, removing the original base and placing the LED on a new substrate, the replacement of the absorbent substrate by the reflective, using light-reflective surfaces such as Bragg reflectors or a mirror base (substrate), the list of new based materials for the LEDs based upon AlGaInP heterostructures as same as sapphire, glass, gallium phosphide, silicon and silicon carbide are presented. Therefore, new advanced methods of emission power are emerging.

Sign in / Sign up

Export Citation Format

Share Document