Results 241 to 250 of about 6,294 (295)

A multi-functional nine channels full-spectrum light emitting diode color temperature palette. [PDF]

PLoS One
Liang J, Cao H, Xu D, Lu X, Huang F, Atai J.   +5 more
europepmc   +1 more source

Scanning Micromirror Calibration Method Based on PSO-LSSVM Algorithm Prediction. [PDF]

Micromachines (Basel)
Liu Y, Cheng X, Zhang T, Xu Y, Cai W, Han F.   +5 more
europepmc   +1 more source

Luminous-flux measurements by an absolute integrating sphere

Applied Optics, 1996
We present an original implementation of the absolute-sphere method recently proposed by Ohno. The luminous-flux unit, the lumen, is realized by means of an integrating sphere with an opening calibrated by a luminous-intensity standard placed outside. The adapted experimental setup permits one to measure luminous-flux values between 5 and 2500 lm with ...
RASTELLO M. L., MIRALDI, ELIO, PISONI P.
openaire   +4 more sources

Methods of estimating luminous flux of the backlight module by luminance measurement

Optical Engineering, 2007
We present several different estimation methods to calculate the total luminous flux and luminous efficiency of a backlight module by using the measurement data from a luminance meter. We used the integrating sphere to measure a backlight module and found the luminous efficiency as 72.232%.
Fung, Rong-Fong;Chang, Liang-Kang;Lin, Chi-Feng, 馮榮豐   +1 more
openaire   +2 more sources

Internal Traceability between Luminous Flux and Illuminance Standards

, 2008
Two methods for the measurement of the luminous flux are presented: the first is based on an integrating sphere and a luminous flux standard lamp, the second utilizes an accurate goniometer and an accurate illuminance meter.
Pietro Fiorentin
exaly   +2 more sources

Energy-maintenance optimization for retrofitted lighting system incorporating luminous flux degradation to enhance visual comfort

Applied Energy, 2020
Retrofitting existing buildings with energy-efficient lighting systems is an effective way to reduce their lighting energy consumption and improve lighting quality.
Xianming Ye, Xiaohua Xia
exaly   +2 more sources

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Luminous flux measurement

Lighting Research & Technology, 1988
A precision goniophotometer developed at the Istituto Elettrotecnico Nazionale, Turin, has been used to measure the luminous flux of standard lamps, with a view to realising a total luminous flux scale by relating the lumen to the candela through its fundamental definition. The instrument is described and measurement errors assessed.
C. Gentile, M.L. Rastello, G. Rossi, P. Soardo   +3 more
openaire   +1 more source

Luminous flux ring mixer

2016 IEEE Lighting Conference of the Visegrad Countries (Lumen V4), 2016
LED modules emitting a luminous flux, implement near-field luminance distribution or colorimetric distribution depending on emitters location. In the far field there is complete mixing of luminous flux, both in terms of quantity as well as because of distribution color parameters.
Maciej Zajkowski, Lukasz Budzynski, Damian Tyniecki   +2 more
openaire   +1 more source

Luminous Intensity and Luminous Flux Standard Lamps Based on COB LEDs

Light & Engineering, 2022
The necessity of creating standard lamps based on LEDs is substantiated. The process of creating and research of reference lamps based on cooled and uncooled LEDs is shown. The physical scheme is substantiating, the principle of operation and the main metrological characteristics of reference lamps based on LED COB are described.
Dmitry V. Scums, Boris V. Eroshenko
openaire   +1 more source

Interocular transfer of a luminous flux discrimination in the rabbit

Vision Research, 1977
Abstract Six normally reared rabbits were trained monocularly on a luminous flux discrimination and tested for interocular transfer. While none of the animals showed complete transfer, all but one required fewer trials to relearn the task with the second eye.
G P, Dickerson, A H, Riesen
openaire   +2 more sources