scholarly journals Refractive index of delignified wood for transparent biocomposites

RSC Advances ◽  
2020 ◽  
Vol 10 (67) ◽  
pp. 40719-40724
Author(s):  
Hui Chen ◽  
Céline Montanari ◽  
Max Yan ◽  
Sergei Popov ◽  
Yuanyuan Li ◽  
...  
Keyword(s):  
Refractive Index ◽  
Light Transmission ◽  
Transmission Model ◽  
Solid Materials ◽  
Layered Solid

Developed light transmission model for determining refractive index of wood, complex porous or layered solid materials and composites.

Light Transmission Model for Determination of the Refractive Index of Solid Particles in Suspensions: An Immersion Study

2011 ◽  
Vol 65 (5) ◽  
pp. 557-560 ◽  
Author(s):  
Jukka Räty ◽  
Ilpo Niskanen ◽  
Risto Myllylä ◽  
Kai-Erik Peiponen
Keyword(s):  
Refractive Index ◽  
Light Transmission ◽  
Solid Particles ◽  
Transmission Model

High Polaried Transmission Effects for Double-Layer Metallic Grating Films on GaN Substrate

2011 ◽  
Vol 295-297 ◽  
pp. 1289-1293
Author(s):  
Bing Cao ◽  
Gui Ju Zhang ◽  
Qin Han ◽  
Chin Hua Wang ◽  
Jian Feng Wang ◽  
...  
Keyword(s):  
Refractive Index ◽  
Double Layer ◽  
Transition Layer ◽  
Light Transmission ◽  
Light Emitting Diode ◽  
Extinction Ratio ◽  
Polarized Light ◽  
Incident Wavelength ◽  
Metallic Grating ◽  
Low Refractive Index

Highly polarized light transmission from GaN based light emitting diode is proposed using a double-layer metallic grating film and a dielectric transition layer. TM mode transmission and the polarized extinction ratio (ER) are calculated using commercial software, based on a full vector implementation of Rigorous Coupled Wave Analysis (RCWA) algorithm. Such a thin-film double-layer grating with subwavelength metallic stripes are designed and simulated by perfect parameters of period, thickness and filling factor for achieving good polarization properties. It is found that TM transmission and ER are almost stable and flat under different slit arrays of the double-layer grating. The polarized structure shows larger width of incident wavelength with a transition layer of a low refractive index than that of a high refractive index, but higher TM transmission and ER can be obtained for low refractive index transition layer. Flat sensitivity and high transmission of the TM mode on the double-layer metal grating thickness have been achieved. Up to 100nm range of the grating height can be employed to achieve TM transmission more than 92% while ER> 20dB. The results provide guidance in designing, optimizing and fabricating the integrated GaN-based and polarized photonic devices.

scholarly journals The Analysis of Light Intensity Transmission Coefficient Through Plastic Fibers for the Design of Closed Room Lighting without Electricity

2021 ◽  
Vol 3 (1) ◽  
pp. 221-228
Author(s):  
Taat Guswantoro
Keyword(s):  
Refractive Index ◽  
Fiber Optics ◽  
Transmission Coefficient ◽  
Light Transmission ◽  
Plastic Material ◽  
Guiding Principle ◽  
Fiber Plastic ◽  
Ethylene Copolymer ◽  
Clear Plastic ◽  
Refractive Index Data

The phenomenon of total internal reflection can be used to guide the light to be transmitted from one place to another, it is applied to the guiding principle of light in fiber optics. A fiber rope made of clear plastic material with a uniform refractive index, when one end fired a beam of light then the light will be forwarded along the strap so that out at the other end. This principle can be applied as a lighting source in a closed room by passing light from the outdoors by using plastic fiber, so it doesn’t need the electricity. In this study, theoretical analysis of the percentage of the intensity of light transmitted by the fiber plastic succeed as a function of the refractive index and determine the transmission coefficient for some plastic seeds are eligible to be used as a plastic fiber light successor. From the results of deriving the equation, the light transmission coefficient of plastic is  and the terms of plastic seeds that can be used as a plastic fiber are having a refractive index . Based on refractive index data from profesionalplastics, the maximum transmission coefficient value for Ethylene Tetrafluoro Ethylene Copolymer is 82.23% and the minimum transmission value of Fluorinated Ethylene Propylene Copolymer is 55.99%.

Refractive index matching for high light transmission composite systems

2018 ◽  
Vol 52 (24) ◽  
pp. 3299-3307 ◽  
Author(s):  
Erin Keaney ◽  
John Shearer ◽  
Artee Panwar ◽  
Joey Mead
Keyword(s):  
Refractive Index ◽  
Light Transmission ◽  
Polymer System ◽  
Visible Spectrum ◽  
Optical Polymer ◽  
Index Matching ◽  
Dispersion Data ◽  
Refractive Index Matching ◽  
Transparent Composite ◽  
Index Match

Transparent optical polymer/filler systems can be produced into complex shapes for a range of applications, such as lenses, shields, and containers. This work used refractive index liquids as a model for polymer matrices to investigate the degree of refractive index match required to maintain high transmission in an inorganic-filled polymer system (cubic calcium fluoride with particle size of 1 to 5 µm) over the visible spectrum. It was determined that in order to achieve a transparent composite (>85% transmission with 10 mm pathlength) with this filler (using literature reported dispersion data), the materials must have a refractive index match within ±0.007 for 1.6 vol.% loading. With a loading of 3.1 vol.%, the matching range required was reduced to approximately ±0.002.

Refractive Index Mismatch and Monomer Reactivity Influence Composite Curing Depth

2008 ◽  
Vol 87 (1) ◽  
pp. 84-88 ◽  
Author(s):  
A.C. Shortall ◽  
W.M. Palin ◽  
P. Burtscher
Keyword(s):  
Refractive Index ◽  
Light Transmission ◽  
Triethylene Glycol ◽  
Diglycidyl Ether ◽  
Refractive Indices ◽  
Triethylene Glycol Dimethacrylate ◽  
Bisphenol A Diglycidyl Ether ◽  
Shade Matching ◽  
Curing Light ◽  
Glass Fillers

Limited cure depth is a drawback of light-activated composites. We hypothesize that curing light transmission and cure depth are influenced by monomer reactivity and filler/resin refractive index mismatch. Light transmission throughout cure was recorded for composites based on strontium (refractive index 1.51) or barium (refractive index 1.53) glass fillers. Fillers were mixed (70 wt%) with 4 bisphenol-A diglycidyl-ether-dimethacrylate (bis-GMA):triethylene glycol dimethacrylate (TEGDMA) formulations with refractive indices ranging from 1.4703 to 1.5370. Following polymerization, cure depth and pre- and post-cure translucency parameters were determined. Transmission changes and cure depths related to monomer reactivity and filler/resin refractive index mismatch with significant interaction. Composites became more opaque or translucent on curing. Optimizing filler/resin refractive index mismatch provides increased curing depth and assists shade-matching.

Influence of Light Scattering Particles on Optical Properties of Polymer Diffusion Plate

2013 ◽  
Vol 562-565 ◽  
pp. 984-990
Author(s):  
Xiu Ting Zheng ◽  
Hai Jun Wang ◽  
Ying Liu ◽  
Da Ming Wu ◽  
Zhong Li Zhao ◽  
...  
Keyword(s):  
Refractive Index ◽  
Optical Properties ◽  
Intensity Distribution ◽  
Particle Concentration ◽  
Light Transmission ◽  
Transmission Rate ◽  
Particle Radius ◽  
Polymer Diffusion ◽  
Scattering Intensity ◽  
The Relationship

In order to analyze the influence of scattering particles on the optical properties of light scatter of polymer diffusion plate, we establish the microspheres of scattering particles in mathematical physics model. According to Mie scattering theory, we study the relationship between the scattering intensity distribution and the particle radius, the refractive index and the wavelength of the incident light. The results show that the particle radius is larger and incident wavelength is smaller, scattering intensity distribution is concentrated; the particle refractive index and scattering intensity distribution are not a simple corresponding relationship. At the same time according to the Monte Carlo method, the simulation is also used to analysis the effect that scattering particle concentration, the scattering particle radius and refractive index influence the diffusion plate light transmission rate and uniformity. The result shows that as the particle concentration is greater and transmittance is smaller, uniformity increases first and then decreases. As the particle radius is small, light transmission rate is higher and the particle refractive index is larger, light transmittance increases first and then decreases. But the relationship of the uniformity, the particle radius and the particle refractive index are all not simple corresponding law.

scholarly journals Plasmonic Nanopores: Optofluidic Separation of Nano-Bioparticles via Negative Depletion

2021 ◽  
Author(s):  
Xiangchao Zhu ◽  
Ahmet Cicek ◽  
Yixiang Li ◽  
Ahmet Ali Yanik
Keyword(s):  
Refractive Index ◽  
Chemical Composition ◽  
High Throughput ◽  
Light Transmission ◽  
Low Cost ◽  
Light Sources ◽  
Label Free ◽  
Incoherent Light ◽  
Drag Forces ◽  
On Chip

In this chapter, we review a novel “optofluidic” nanopore device enabling label-free sorting of nano-bioparticles [e.g., exosomes, viruses] based-on size or chemical composition. By employing a broadband objective-free light focusing mechanism through extraordinary light transmission effect, our plasmonic nanopore device eliminates sophisticated instrumentation requirements for precise alignment of optical scattering and fluidic drag forces, a fundamental shortcoming of the conventional optical chromatography techniques. Using concurrent optical gradient and radial fluidic drag forces, it achieves self-collimation of nano-bioparticles with inherently minimized spatial dispersion against the fluidic flow. This scheme enables size-based fractionation through negative depletion and refractive-index based separation of nano-bioparticles from similar size particles that have different chemical composition. Most remarkably, its small (4 μm × 4 μm) footprint facilitates on-chip, multiplexed, high-throughput nano-bioparticle sorting using low-cost incoherent light sources.

In situ determination of refractive index and size of Bacillus spores by light transmission

2005 ◽  
Vol 30 (6) ◽  
pp. 589 ◽  
Author(s):  
A. Katz ◽  
Alexandra Alimova ◽  
M. Xu ◽  
Paul Gottlieb ◽  
Elizabeth Rudolph ◽  
...  
Keyword(s):  
Refractive Index ◽  
Light Transmission ◽  
Bacillus Spores
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