Light Transmission Measurements Through Glass Fiber Insulations

2009 ◽  
pp. 263-263-18 ◽  
Author(s):  
CM Pelanne
Keyword(s):  
Glass Fiber ◽  
Light Transmission ◽  
Transmission Measurements

scholarly journals Light transmission measurements and phototherapy eyepatches.

1991 ◽  
Vol 66 (1 Spec No) ◽  
pp. 59-61 ◽  
Author(s):  
J Robinson ◽  
M J Moseley ◽  
A R Fielder ◽  
S C Bayliss
Keyword(s):  
Light Transmission ◽  
Transmission Measurements

Comparison of Two Coating Material Reflections of Hollow Light Guide Tube

2014 ◽  
Vol 1041 ◽  
pp. 412-415
Author(s):  
Lenka Janečková ◽  
Stanislav Darula ◽  
Daniela Bošová
Keyword(s):  
Light Guide ◽  
Light Transmission ◽  
Transmission Efficiency ◽  
Luminous Flux ◽  
Coating Material ◽  
Guide Tube ◽  
Coating Materials ◽  
Two Samples ◽  
Transmission Measurements ◽  
Light Guides

This paper discusses tube transmission efficiency of two straight hollow light guides. Two samples with diameter of 530 mm and length 1170 mm were investigated under the artificial sky in the laboratory at ICA SAS in Bratislava. The entering luminous flux was calculated from measured illuminance in the point located on the top of light guide. Below the bottom of the light guide was located a set of measuring points on the special construction in the shape of a cross. In these points, one by one, the elementary illuminances were measured and the luminous fluxes leaving the light guide were calculated. Paper presents methodology for laboratory light transmission measurements and discusses effects of two various coating materials on light transmission efficiency of hollow light guides.

Anti-Reflective Structure of PMMA/Glass Fiber Membrane Produce by Argon Plasma Etching and Variation of Transmitted Intensity

2012 ◽  
Vol 627 ◽  
pp. 864-868
Author(s):  
T.L. Hsin ◽  
W.H. Hsing ◽  
Nour Chuang
Keyword(s):  
Glass Fiber ◽  
Output Power ◽  
Plasma Etching ◽  
Light Transmission ◽  
Membrane Surface ◽  
Argon Plasma ◽  
Process Time ◽  
Transmitted Intensity ◽  
Fiber Membrane ◽  
The Impact

The aim of this research is to increase the membrane’s transmitted intensities; it used Argon plasma etching to process the anti-reflective structure on PMMA/glass fiber membrane surface. The anti-reflective structure could increase the light transmission at the identical specification of membrane’s basic cloth. Membrane’s transmitted intensities can directly affect it products competitiveness. The parameter of experimentation set with distance between sample and RF plate are 19 or 5.5 centimeters, plasma output power is 270, 240, 210 Watt respectively, each process time is 6, 12, 18, 24, 30 seconds. In this stage, the best transmitted intensity of parameter is 19cm, 210W, 30sec; it increased 2.4 % than non-treatment sample. The summary of this study, decreased plasma output power would reduce the impact extent of plasma gas but uniformity of structure should increase. Decreased the distance between sample and RF plate can avoided the degeneration of energy, reinforced the problem of insufficient etching and reduced the turbulence.

scholarly journals Measurements of Photo-Induced Changes in Conjugated Polymers

1991 ◽  
Vol 228 ◽  
Author(s):  
Carleton H. Seager ◽  
Michael B. Sinclair ◽  
D. Mc Branch ◽  
A. J. Heeger ◽  
G. L. Baker
Keyword(s):  
Absorption Spectra ◽  
Light Transmission ◽  
Pump Light ◽  
General Shape ◽  
Experimental Conditions ◽  
Photothermal Deflection Spectroscopy ◽  
Highly Sensitive ◽  
Infra Red ◽  
Transmission Measurements ◽  
Induced Changes

ABSTRACTWe have used the highly sensitive technique of Photothermal Deflection Spectroscopy (PDS) to measure changes in the infra-red absorption spectra of MEHPPV, P3HT and Polydiacetylene-4BCMU induced by pumping these polymers with light above the π - π* transition energy. In contrast to previous chopped light transmission measurements of these effects, the PDS technique can directly measure the buildup or decay of the absorption coefficient, m, on the time scale of seconds to days. In the case of MEHPPV we observe that above-gap light causes the appearance of a broad infra-red peak in α, which continues to grow-in hours after the pump light is first applied. For this polymer the general shape of the absorption spectra in the unpumped state mimics the photo-induced changes, suggesting that remnant photo-induced states determine the maximum transparency observed under normal experimental conditions. For P3HT and to a lesser extent, MEHPPV, we also observe irreversible photo-induced absorption components which we tentatively identify with photo-induced oxidation of the polymer matrix.

Mechanical and optical properties of silk fabric/glass fiber mat composites: an artistic application of composites

2017 ◽  
Vol 88 (8) ◽  
pp. 932-945 ◽  
Author(s):  
Yuqiu Yang ◽  
Defang Zhao ◽  
Jing Xu ◽  
Yuying Dong ◽  
Yan Ma ◽  
...  
Keyword(s):  
Optical Properties ◽  
Glass Fiber ◽  
Light Transmission ◽  
Single Layer ◽  
Negative Influence ◽  
Silk Fabric ◽  
Glass Composites ◽  
Reinforced Plastics ◽  
Glass Fiber Reinforced ◽  
The Impact

Currently, hybrid glass fiber-reinforced plastics (GFRPs) have attracted increasing attention as gradually common used materials. Glass/silk fiber hybrid reinforced plastic (GSFRP), a new kind of material, is designed aiming to create a kind of opaque effect of specific use. Three types of silk/glass composites with five layers of glass mats and a single layer of woven silk fabric lamina with small, medium and large crepe are fabricated by using the hand lay-up method to compare with pure GFRP. Optical properties, including the light transmission property and luminance distribution, were examined with regard to the specimens of GSFRP. Results indicate that light was diffused more efficiently by GSFRP than pure GFRP laminates. Moreover, the greater the crepe degree of silk fabric is, the more efficiently light is diffused and the rise of luminance suppressed. Furthermore, mechanical properties, including the flexural as well as the impact property, were examined through three-point bending and Izod tests, respectively. There is little negative influence on the flexural strength of GSFRP when silk inserted in layer 3 and, as the crepe degree of silk fabric increases, a slightly inferior effect on the impact test presented. From the scanning electron microscopy observation, it is found that the existence of silk fabric inserted in layer 3 could prevent further propagation of the crack and alleviate the delamination of the specimens during the bending process, improving resistance to delamination and bending.

Use of Thin-Layer Chromatography on Silica Gel for Serum Lipid Fractionation and Measurement in the Routine Clinical Laboratory

1972 ◽  
Vol 18 (4) ◽  
pp. 384-390 ◽  
Author(s):  
Antonio Chedid ◽  
Peter Haux ◽  
Samuel Natelson
Keyword(s):  
Thin Layer ◽  
Silica Gel ◽  
Light Transmission ◽  
Clinical Laboratory ◽  
Internal Standard ◽  
Serum Fractions ◽  
Transmission Measurements ◽  
Routine Clinical Laboratory ◽  
Layer Chromatography ◽  
Apparently Healthy

Abstract A procedure, appropriate to use in the routine laboratory, is described for thin-layer chromatographic separation of serum lipids on silica gel, followed by molybdate coloring and densitometry. Cholesteryl aniline is used as the internal standard. The procedure is recommended as a screening procedure for presenting graphically the lipid distribution in the serum. Fractions separated and values (±1 SD) obtained from light-transmission measurements, for 70 apparently healthy adults, were: phospholipids, 239 ± 69 mg/dl; monoglycerides, <5 mg/dl; cholesterol, 53 ± 12.2 mg/dl; diglycerides, <5 mg/ dl; free fatty acids, 14.3 ± 8.9 mg/dl; triglycerides, 89 ± 30 mg/dl; and esterified cholesterol, 164 ± 25 mg/dl. The method was applied to the study of distribution of lipids in the serum of patients with various diseases.

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