Results 271 to 280 of about 8,746,494 (343)
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Light Output Measurement of Solid State Lighting Technology
2019 4th International Symposium on Instrumentation Systems, Circuits and Transducers (INSCIT), 2019Records from experiments performed with Solid State Lighting technology are presented and discussed. They were done to expand the local knowledge about light output depreciation from Inorganic Light Emitting Diodes technology. Data were collected at the Campus of the University of Sao Paulo for road lighting and for interior lighting at the Institute ...
Elvo Calixto Burini +2 more
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Characterizing the output settings of dental curing lights
Journal of Dentistry, 2016For improved inter-study reproducibility and ultimately improved patient care, researchers and dentists need to know what electromagnetic radiation (light) is emitted from the light-curing unit (LCU) they are using and what is received by the resin.
J.E. Harlow +4 more
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Electrical Engineering, 1940
In illumination problems, it is often necessary to compute the solid angle of a light beam in steradians in order to determine the total flux emitted by the source in lumens. When the plane angle of divergence of the beam is small and, hence, the half angle is small, the use of the common relationship ω = 2π(1 – cos α) becomes quite cumbersome.
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In illumination problems, it is often necessary to compute the solid angle of a light beam in steradians in order to determine the total flux emitted by the source in lumens. When the plane angle of divergence of the beam is small and, hence, the half angle is small, the use of the common relationship ω = 2π(1 – cos α) becomes quite cumbersome.
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How to improve light curing output
The Journal of Prosthetic Dentistry, 1993There are several reasons for low intraoral curing light output as reported in the CRA Newsletter February 1989.l TRCINSFORNER STEPUP Output 126 VAC Fig. 1 illustrates the variation in light output versus line voltage input. The equipment used was a Cure Rite radiometer (EFOS, Williamsville, N. Y.), a Fluke 8921A True RMS voltmeter (John Fluke Mfg. Co.,
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Directional Light Output from a Circular Microdisk Laser
2007 9th International Conference on Transparent Optical Networks, 2007Lasing properties of a circular dielectric microdisk laser are investigated. We find the possibility of directional output emissions based on a triangular shaped mode structure which can be constructed by superposition of a few whispering gallery modes.
Kwon, T., Wiersig, J., Hentschel, M.
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Deep Ultraviolet Light Source from Ultrathin GaN/AlN MQW Structures with Output Power Over 2 Watt
Advanced Optical Materials, 2019High‐output‐power electron‐beam (e‐beam) pumped deep ultraviolet (DUV) light sources, operating at 230–270 nm, are achieved by adjusting the well thickness of binary ultrathin GaN/AlN multiple quantum wells.
Yixin Wang +25 more
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Investigation of Absolute Light Output Measurement Techniques
IEEE Transactions on Nuclear Science, 2006The recently published works on new measurement techniques of the scintillators' absolute light yield triggered our response in the attempt to find out a way to resolve the disagreements between the old, established technique and the emerging, new one.
Michal Gierlik +5 more
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Anomalous light output from lightning dart leaders
Journal of Geophysical Research: Atmospheres, 1985About 5% of the multiple‐stroke cloud‐to‐ground lightning discharges recorded at the NASA Kennedy Space Center during the summer of 1981 contained dart leaders that produced an unusually large light output. An analysis of these cases indicates that the average peak light output per unit length in the leader may be comparable to or even exceed that of ...
C. Guo, E. P. Krider
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Light rail transit: Cost and output
Journal of Urban Economics, 1980Abstract Growing concerns about environment, oil depletion, and traffic congestion call for a fresh look at mass transit—specifically non-polluting, low noise, nonoil-consuming, high-speed electric transit. This article attempts to relate cost to output, both for light rail and the alternative transit mode, i.e., the express bus.
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LED Output Light Characteristic by Lens Eccentricity
Journal of the Korean Society of Precision Engineering, 2012LED (Light Emitting Diode)는 빛을 방출하는 반도체 소자로서 그 방식이 친환경적이어서 냉음극 형광램프 (CCFL; Cold cathode fluorescent lamp)와 같이 환경오염물질을 사용하지 않을 뿐만 아니라 백열등보다 광 변환효율이 매우 높다. 따라서 최근에 모바일 디스플레이는 물론이고, 모니터, TV 등 거의 모든 TFT-LCD (Thin film transistor liquid crystal display) 디스플레이 제품에서는 백라이트용 광원으로 LED를 사용하고 있다. 또한 실내조명은 물론 야외 조명, 가로등, 신호등을 비롯하여 조명용 광원으로서의 수요가 급격히 늘어나고 있다.
Young-Chul Kim, Jong-Sun Lyu
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