Relevant bibliographies by topics / Flux lumineux

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Flux lumineux'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "Flux lumineux"

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Vaissiere, Dimitri, Murielle Bach, and Alain Cornet. "Caractérisation par rayons X et mesure de flux lumineux rétrodiffusé de surfaces oxydées." Matériaux & Techniques 91, no. 5-6 (2003): 27–32. http://dx.doi.org/10.1051/mattech/200391050027.

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Pandard, P., and P. Vasseur. "Biocapteurs pour le contrôle de la toxicité des eaux : application des bioélectrodes algales." Revue des sciences de l'eau 5, no. 3 (April 12, 2005): 445–61. http://dx.doi.org/10.7202/705141ar.

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L'amélioration de la qualité de l'environnement passe par la réalisation de contrôles de toxicité in situ et en continu des sources de pollution ou des milieux contaminés, à l'aide de systèmes automatisés à réponse rapide. Les systèmes donnant une réponse en temps réel permettent d'intervenir immédiatement à la source, d'interrompre le rejet d'un flux toxique et de prévenir ainsi les accidents de pollution. Ce type de stratégie ne peut être développé qu'au moyen de biocapteurs : les méthodes d'essais conventionnelles n'autorisent que des contrôles de toxicité épisodiques, en laboratoire, effectués dans des conditions statiques quelque peu éloignées des conditions dynamiques. Nous nous sommes intéressés à la mesure de l'activité photosynthétique d'algues unicellulaires immobilisées. La photosynthèse induite par des stimuli lumineux est en effet un processus dont la réponse est immédiate et aisément mesurable à l'aide de transducteurs électrochimiques. Il apparaît donc intéressant d'utiliser ces réactions photosynthétiques pour la détection des polluants. Deux dispositifs mesurant l'activité photosynthétique d'algues unicellulaires ont été testés. Le premier dispositif mesure le transfert d'électrons le long de la chaîne photosynthétique lors d'une illumination des micro-organismes. Le second système permet de quantifier la production d'oxygène résultant de cette excitation lumineuse. La mesure du transfert d'électrons photosynthétiques nécessite l'addition d'une substance oxydo-réductible (médiateur) dans le milieu pour capter ces électrons. De la série de médiateurs testés, seuls les dérivés à caractère lipophile (2,6-diméthylbenzoquinone et p-benzoquinone) ont permis de mesurer un transfert d'électrons. Toutefois la durée de vie de ce biocapteur s'est révélée limitée à moins de 24 heures, ce qui exclut toute utilisation en continu. Le second dispositif développé présente en revanche une longévité d'une semaine, ce qui le rend intéressant en vue d'une utilisation in situ. Les performances de ce capteur à oxygène ont été testées sur des produits de type herbicides, cyanures, métaux et comparées aux valeurs obtenues à l'aide de tests algues classiques ou de méthodes de détection rapide de la toxicité.
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Gentile, C., M. L. Rastello, G. Rossi, and P. Soardo. "Luminous flux measurement." Lighting Research & Technology 20, no. 4 (December 1988): 189–93. http://dx.doi.org/10.1177/096032718802000406.

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Quan, Cao Xuan, Vu Khanh Xuan, Luu Thi Lan Anh, and Vo Thach Son. "Study of Temperature Effect on Luminous Flux of High Power Chip on Board Light Emitting Diode." Communications in Physics 24, no. 3 (August 21, 2014): 267. http://dx.doi.org/10.15625/0868-3166/24/3/4231.

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High power chip on board light emitting diode (HPCOBLED) are a promising solid state light technology for a variety of lighting applications. In this study, we studied temperature effect on luminous flux of HPCOBLED using VMI-PR-001 system of Vietnam Metrology Institute. The results according to the temperature Tc is increasing, luminous flux reduced. Especially HPCOBLED is larger power, decreasing luminous flux is larger. Reason of this is chance power. HPCOBLED model describes the temperature affection on luminous flux of HPCOBLED. The results of HPCOBLED model matched with that measured by the luminous flux measurement system (VMI-PR-001, Vietnam).
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Nesterkina, Nina P., Yulia A. Zhuravlyova, Evgeny A. Kuznetsov, Evgeny S. Shichavin, and Maksim S. Shishkanov. "Research Of Long-Term Lighting Tests Of Led retrofit And Filament Lamps." Issue 03-2021, no. 03-2021 (June 2021): 62–69. http://dx.doi.org/10.33383/2021-019.

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The paper analyzes the results of comparative studies of the light and engineering characteristics of LED retrofit lamps and filament lamps of the A60 form factor of nine manufacturers: Uniel (Russia – China), JazzWay (Russia – China), Philips (the Netherlands), Ecola (China), Wolta (Germany), Feron (Russia), Rev (Germany), Osram (Germany), Forza (China) – luminous flux, power consumption, correlated colour temperature, luminous efficacy, flicker index, spectral distribution of the radiation flux density during 6000 hours of lamps burning. The test results show that: а) the measured value of the initial luminous flux of all LED retrofit lamps corresponds to the declared; б) the measured value of the initial luminous flux of filament LED lamps is lower than the declared values by an average of 19 %; в) high value of the luminous flux maintenance factor after 6000 hours of burning among LED retrofit lamps showed Uniel LED10 W 4000 К (94.5 %), Philips Essential LED9 W 6500 K (96.2 %), Wolta LX 12 W 3000 К (95.3 %), for JazzWay PLED-SP 10 W 5000 K and Ecola Classic LED10.2 W 4000 K lamps, the luminous flux maintenance factor was less than 90 %; г) the luminous flux maintenance factor after 6000 hours of burning of all filament LED lamps ranged from 91.3 % to 96.4 %, except for the Feron LB‑57 7 W 2700 K lamp – 89.3 %. According to the test results, only for the Uniel LED10 W 4000 K lamp, the measured values of the light and engineering characteristics and the flicker index, including after 6000 hours of burning, correspond to the declared ones. The high luminous flux maintenance factor after 6000 hours of burning allows this lamp to be classified as A-category in terms of decreasing luminous flux.
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Li, Jian, and Kun Wang. "Design of Polygon Prism Optical Lens for LED Street Lamps." Advanced Materials Research 756-759 (September 2013): 4541–44. http://dx.doi.org/10.4028/www.scientific.net/amr.756-759.4541.

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High-power light emitting diode (LED) develops greatly owing to its high energy efficiency, high color rendering and long life. However, it is important to design a secondary optical lens for the LED lamps to obtain a good output efficiency and light distribution pattern. The purpose of the secondary optical design for light emitting diode (LED) illumination is to rearrange the luminous flux output of LED and then achieve the desired luminous intensity distribution. In this paper, a polygon prism lens for street lamps was designed and the desired illumination was achieved. The design procedure of the polygon prism lens is presented. The simulation of the street lamps is implemented using Tracepro 7.0. The results show that the polygon prism lens can distribute the luminous flux accurately and reasonably. The luminous flux can be saved as much as possible and a rectangular distribution of luminous flux is attained.
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Kovalenko, Olga Yu, and Yulia A. Zhuravlyova. "Analysis of Characteristics of Halogen and LED Automobile Lamps." Light & Engineering, no. 04-2020 (August 2020): 57–62. http://dx.doi.org/10.33383/2019-067.

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This work contains analysis of characteristics of automobile lamps by Philips, KOITO, ETI flip chip LEDs, Osram, General Electric (GE), Gtinthebox, OSLAMPledbulbs with H1, H4, H7, H11 caps: luminous flux, luminous efficacy, correlated colour temperature. Characteristics of the studied samples are analysed before the operation of the lamps. The analysis of the calculation results allows us to make a conclusion that the values of correlated colour temperature of halogen lamps are close to the parameters declared by manufacturers. The analysis of the study results has shown that, based on actual values of correlated colour temperature, it is not advisable to use LED lamps in unfavourable weather conditions (such as rain, fog, snow). The results of the study demonstrate that there is a slight dispersion of actual values of luminous flux of halogen lamps by different manufacturers. Maximum variation between values of luminous flux of different lamps does not exceed 14 %. The analysis of the measurement results has shown that actual values of luminous flux of all halogen lamps comply with the mandatory rules specified in the UN/ECE Regulation No. 37 and luminous flux of LED lamps exceeds maximum allowable value by more than 8 %. Luminous efficacy of LED lamps is higher than that of halogen lamps: more than 82 lm/W and lower power consumption. The results of the measurements have shown that power consumption of a LED automobile lamp is lower than that of similar halogen lamps by 3 times and their luminous efficacy is higher by 5 times.
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Tin, Phu Tran, Tran Hoang Quang Minh, Nguyen Huu Khanh Nhan, Hsiao-Yi Lee, and Tran Thanh Trang. "Green-emitting CaF2:Ce3+,Tb3+ phosphor: selection for improving luminous flux and color quality of conformal geometry white LED lamps." Materials Science-Poland 36, no. 4 (December 1, 2018): 563–69. http://dx.doi.org/10.2478/msp-2018-0095.

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AbstractIn the last decades, new solutions for improving lighting properties of white LED lamps (WLEDs) have been the main research direction in optoelectronics. In this paper, a modern approach for enhancing luminous flux and color quality of white LED lamps was presented. By mixing green-emitting CaF2:Ce3+,Tb3+ phosphor with yellow-emitting YAG:Ce phosphor compound, the luminous flux and color quality of white LED lamps with conformal phosphor geometry (CPG) increased significantly. From the obtained results it follows that, the luminous flux increased more than 1.5 times, and the correlated color temperature deviation decreased more than 4 times in comparison with the non-green-emitting CaF2:Ce3+,Tb3+ phosphor. The presented research shows that the green-emitting CaF2:Ce3+,Tb3+ phosphor could become a good candidate for enhancing luminous flux and color quality of white LED lamps.
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Yan, Jin-Ren, De-Cong Li, Zhi-Kun Wang, and Wen-Ping Rao. "An Iterative Method for the Uniformity Improvement of Edge-Lit Backlight." Advances in OptoElectronics 2016 (September 28, 2016): 1–5. http://dx.doi.org/10.1155/2016/1760260.

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A simple iterative optimization method is developed to improve the exiting light uniformity of the edge-lit backlight module. The method uses the relative deviation of the average luminous flux of the entire light guide plate (LGP) and the luminous flux of each region as constraint criterion and the ratio of the luminous flux of each region to the average luminous flux of the LGP as adjustment coefficient to adjust the density of the microstructures in each region. This process loops until the relative deviations of all regions meet a prespecified threshold value. A LGP based on microprism structure is presented to validate the method. The initial values, which represent the size of the microstructures manufactured on the bottom surfaces of the LGP, d0-dependent luminous fluxes, microstructure size distributions, iterations of the LGP, and the relative deviation of each region are discussed. The simulation results show that it is a very practical method for the uniformity improvement of the backlight when an appropriate initial value is selected and the final uniformity is better than 90% after optimization.
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Tabaka, Przemyslaw. "Pilot Measurement of Illuminance in the Context of Light Pollution Performed with an Unmanned Aerial Vehicle." Remote Sensing 12, no. 13 (July 2, 2020): 2124. http://dx.doi.org/10.3390/rs12132124.

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This article presents the methodology and results of pilot field illuminance measurements using an unmanned aerial vehicle (UAV). The main goal of the study was to quantify the luminous flux emitted in the upper hemisphere (toward the sky) based on obtained measurement data. The luminous flux emitted toward the sky is the source of undesirable light pollution. For test purposes, a height-adjustable mobile park lantern was constructed, at the top of which any type of luminaire can be installed. In the pilot measurements, two real opal sphere-type luminaires were considered. The lantern was situated in an open area located away from a large city agglomeration. To determine the unusable luminous flux, illuminance was measured, placing the necessary measuring equipment on board a UAV. The measurements were supplemented with the registration of illuminance on the ground upon which the lantern was installed. Based on these data, the useful luminous flux was calculated. The findings show that UAVs may be successfully used for the assessment of the influence of lighting on the light pollution effect.
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Dissertations / Theses on the topic "Flux lumineux"

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Brière, Normand. "Représentation hiérarchique de flux lumineux." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape7/PQDD_0015/NQ43702.pdf.

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Louhichi, Véronique. "Réalisation d'un dispositif de mesure du flux lumineux et du flux spectrique énergétique application à l'étude du rayonnement des lampes à décharge haute pression." Grenoble 2 : ANRT, 1986. http://catalogue.bnf.fr/ark:/12148/cb37599248s.

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Terrom, Mickaël. "Etude d'un dispositif à fibres optiques permettant la collection, le transport et le contrôle d'un flux lumineux solaire." Montpellier 2, 2009. http://www.theses.fr/2009MON20114.

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Gautier, Jean-Luc. "Contribution à la modélisation microonde des transistors à effet de champ sur arseniure de gallium soumis à un flux lumineux application aux dispositifs commandés optiquement /." Grenoble 2 : ANRT, 1987. http://catalogue.bnf.fr/ark:/12148/cb37605324d.

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Gautier, Jean-Luc. "Contribution à la modélisation microonde des transistors à effet de champ sur Arséniure de Gallium soumis à un flux lumineux : application aux dispositifs commandés optiquement." Paris 11, 1987. http://www.theses.fr/1987PA112028.

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L'utilisation d'une méthode d'optimisation pour déterminer les éléments du modèle électrique linéaire équivalent du transistor à effet de champ sur arséniure de gallium (MESFET) est présentée dans ce mémoire. La sensibilité et la précision de cette méthode sont analysées, une méthode de préoptimisation est alors proposée permettant d'améliorer la précision des résultats. Un banc de caractérisation électrique statique et dynamique piloté par calculateur a été mis au point. Les points importants de cette étude sont la réalisation d'un traceur de caractéristiques statiques performant et l'étude des méthodes d'élimination de l'environnement de mesure microonde du composant. Les variations des éléments du modèle électrique équivalent en fonction de la puissance lumineuse sont présentées, elles montrent que seul un petit nombre d'entre eux subissent une variation significative. La possibilité de commande de la fréquence d'un oscillateur par un flux lumineux est montrée théoriquement et vérifiée expérimentalement. L'étude et la réalisation de deux amplificateurs à bande étroite permettent de mettre en évidence la commande du gain par la lumière avec une dynamique pouvant atteindre 20 dB. Une méthode graphique permettant la détermination de l'impédance de contre-réaction d'un amplificateur à gain plat sur une large bande de fréquence est présentée. Cette méthode a été utilisée pour étudier un amplificateur à gain plat adapté à l'entrée et à la sortie entre 4 et 8 GHz. Un certain nombre d'applications potentielles sont également présentées ainsi qu'une structure de transistor à grille inversée permettant d'augmenter l'influence des effets photoélectriques
The use of an optimization method for the determination of equivalent linear electrical model elements of gallium arsenide field effect transistor (MESFET) is presented. Sensibility and accuracy of this method are analysed, a preoptimization method is proposed for the amelioration of the results accuracy. A computer driven static and dynamic electrical measurement set has been developped. The main features are the realization of an efficient static characteristic plotter and an investigation of the microwave de-embedding of the component. The equivalent electrical model element variations with regard to the incident power light are presented, only a few of them have a significant variation. The optical frequency control of oscillator is theoretically shown and experimentally verified. The design and the realization of two narrow-band amplifiers emphasizes the light control gain. A graphical method for the feed-back impedance determination of flat gain amplifier over a wide frequency range is presented. This method is used to design an input-output matched flat gain amplifier between 4 and 8 GHz. Other potential applications are also presented and in addition an inversed grid transistor which permits to increase photoelectric effects
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Pouvil, Pierre. "Nouveau modèle analytique du transistor à effet de champ à grille métallique sur arseniure de gallium en régime de saturation application à la modélisation des caractéristiques électriques sous l'action d'un flux lumineux /." Grenoble 2 : ANRT, 1987. http://catalogue.bnf.fr/ark:/12148/cb376090356.

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Pouvil, Pierre. "Nouveau modèle analytique du transistor à effet de champ à grille métallique sur Arséniure de Gallium en régime de saturation : application à la modélisation des caractéristiques électriques sous l'action d'un flux lumineux." Paris 11, 1987. http://www.theses.fr/1987PA112023.

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Un nouveau modèle analytique du transistor à effet de champ à grille métallique sur arséniure de gallium (MESFET) est présenté dans ce mémoire. Il permet la détermination des caractéristiques statiques et des éléments du schéma électrique équivalent extrinsèque aux fréquences inférieures à 1GHz. Le modèle est basé sur l'approximation quadratique de la forme de la zone dépeuplée sous la grille en régime saturé. La différence de potentiel dans le canal conducteur est donnée par la solution de l'équation de Poisson en tenant compte de la variation de la densité d'électrons libres dans celui-ci. Les phénomènes physiques fondamentaux tels que les effets de bord, de survitesse, ainsi que l'injection des électrons dans la couche tampon sont pris en compte dans cette étude. La validation du modèle est faite par comparaison entre simulation et expérience, pour les caractéristiques courant-tension, et pour les éléments du schéma électrique équivalent extrinsèque d'un MESFET à grille submicronique dans l'obscurité. Les variations théoriques et expérimentales des caractéristiques électriques du transistor en fonction de la puissance lumineuse sont ensuite étudiées lorsque le MESFET est soumis à un flux lumineux dont l'énergie est supérieure à la largeur de la bande interdite du matériau. Enfin, les applications des effets photoélectriques dans le MESFET sont illustrées par la réalisation d'un amplificateur et d'un oscillateur à commande optique
A new analytical model is proposed for the gallium arsenide field effect transistor (MESFET) in the saturation region. When the frequency is less than 1 GHz, the model provides the static characteristics and the extrinsic elements of the equivalent scheme. The model is based on an approximate quadratic form for the depletion region when electron velocity reaches up to the saturation velocity. The potential in the channel is given by the solution of Poisson's equation by taking into account the variation of the electron density inside it. Main physical phenomena like edge effects, overshoot velocity and the carrier injection in the buffer layer are taken into account. Theoretical and experimental results for the I-V characteristics, transconductance, output conductance, gate-source capacitance and gate-drain capacitance are made on submicrometre gat MESFET without and under illumination when the photon energy is greater than the gap bandwidth of the semiconductor. Applications of photo effects in MESFET are given with the design of MESFET amplifier and oscillator controlled by the light
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Verrier, Isabelle. "Influence de certains paramètres sur la propagation lumineuse dans les fibres optiques : fluctuations d'intensité en sortie de fibre multimodale." Saint-Etienne, 1988. http://www.theses.fr/1988STET4008.

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L'étude de flux lumineux lors d'un couplage fibre-fibre a permis d'évaluer, en lumière incohérente et cohérente, l'énergie couplée, les fluctuations et le rapport signal sur bruit. Ce travail a amené alors à considérer les variations d'intensité en sortie de fibre sous influence d'une courbure et de modéliser les répartitions de puissance lumineuse en fonction de cette contrainte
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Errera, Marie-Hélène. "Etude des mécanismes immunitaires des uvéites idiopathiques par une approche biologique et l'optique adaptative." Thesis, Paris 6, 2016. http://www.theses.fr/2016PA066714/document.

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La majorité des modèles d’uvéites expérimentales sont médiées par les sous-types lymphocytaires CD4+ T-Helper 1 (Th1) et Th17. Le but de cette thèse est d’étudier les mécanismes immunitaires mis en jeu lors d’une uvéite idiopathique (sans étiologie) chez l’humain. La première partie de cette étude est donc consacrée à l’étude du profil biologique de 30 cytokines/chimiokines/ facteurs de croissance intraoculaires (AqH) et sériques obtenues au laboratoire (technologie Luminex®). Ces médiateurs sont dosés dans le sérum et l’AqH de patients atteints d’uvéites intermédiaires et postérieures activesidiopathiques. Ces résultats sont comparés à une cohorte de patients non inflammatoires et à des groupes de patients atteints d’uvéites de diverses étiologies. Nous avons trouvé que le profil des médiateurs diffère nettement en fonction de la cause de l’inflammation intraoculaire. Une réponse pro-inflammatoire large est observée avec des concentrations accrues des cytokines de type Th1 (IFNγ, IL-12), Th17 (IL-17), TNF-α, IL-6, MIP-1α, MIP-1β, MCP-1, G-CSF et IP-10 dans les uvéites idiopathiques. Les concentrations sériques différent de celles des contrôles par les taux d’IL-17 et IP-10 augmentés. La deuxième partie concerne l’étude des mécanismes immunitaires des uvéites par l’analyse des vascularites en imagerie adaptative (FIOA) et particulièrement l’observation anatomique des modifications liées aux inflammations oculaires. Nous ne trouvons pas de corrélation entre l’aspect de cellularité périvasculaire en FIOA et les cytokines retrouvées dans l’AqH des yeux avec uvéite. Pouvoir déterminer quels médiateurs de l’inflammation interviennent dans les pathologies inflammatoires permettrait de les cibler avec des thérapies adaptées
Most of experimental models of uveitis are mediated by lymphocytic subtypes CD4+ T-Helper 1 (Th1) et Th17. The aim of this thesis is to study the immune mechanisms in idiopathic uveitis (i.e. unknown etiology) in humans. First, we will determine the biological spectrum of 30 cytokines/ chemokines/ growth factors in aqueous humour and sera by Luminex® technology. Those mediators will be measured in the serum and aqueous humour of patients with active intermediate and posterior uveitis classified as idiopathic. Those results will be compared to a cohort of patients with no inflammation and to patients with uveitis of various causes. We found that the profile of mediators changes regarding to the cause of the intraocular inflammation. The proinflammatory process is related to increased levels of cytokines Th1 (IFNγ, IL-12), Th17 (IL-17), TNF-α, IL-6, MIP-1α, MIP-1β, MCP-1, G-CSF and IP-10 idiopathic uveitis. The sera of the patients with idiopathic uveitis have increased levels IL-17 and IP-10. Secondly, the immune mechanisms of uveitis were studied by adaptive optics imaging (FIOA) and particularly the observation of anatomic changes related to ocular inflammations. We ruled out any correlation betweeen the perivascular cellular opacification in FIOA and the cytokines/ chemokines found in the eyes with uveitis. An understanding of the profile of mediators in inflammation and their determination could help to target idiopathic uveitis with correct therapies
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Itjoko, Serge. "Optimisation des propriétés radiatives de revêtements alumine/luminophores pour lampes fluorescentes." Paris 6, 2008. http://www.theses.fr/2008PA066316.

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Ce travail a pour objectif l’optimisation de l’émission lumineuse des revêtements fluorescents de tubes à décharge. Premièrement, nous avons construit un modèle permettant de rendre compte de l’émission visible dans un système hétérogène dont la géométrie se rapproche de celle des revêtements fluorescents. Ce modèle, basé sur la théorie du Transfert Radiatif, permet de calculer les coefficients de réflexion (R), de transmission (T), et le flux émis par la couche. Les simulations de ce dernier montrent qu’on peut l’optimiser par différents paramètres morphologiques de la couche. Dans un deuxième temps, nous avons caractérisé des revêtements existants afin de déterminer leurs paramètres morphologiques et leurs propriétés d’émission, données indispensables à notre modèle. Les simulations de R et T sont en accord quantitatif et qualitatif avec les mesures. Après validation par des mesures d’émission, ce modèle devrait permettre de simuler la lumière émise par divers revêtements fluorescents.
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Books on the topic "Flux lumineux"

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He, Minggao. High pressure sodium discharge lamp characterization for use as standards of geometrically total luminous flux. Gaithersburg, MD: U.S. Dept. of Commerce, National Bureau of Standards, 1988.

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Maria Magdalena Z'Graggen: Luminous Flux. Vfmk, 2016.

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Forste, D., and G. Sauter. Determination of the Ration of the Luminous Flux of Discharge Lamps to the Luminous Flux of Reference Incandescent Lamps (Bcr Information, 9). European Communities, 1986.

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Garforth, F. A., P. G. Moss, and J. R. Moore. Intercomparison of Luminous Flux Measurements on High-pressure Sodium Lamps. European Communities / Union (EUR-OP/OOPEC/OPOCE), 1992.

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IESNA Testing Procedures Committee. Photometry of Light Sources Subcommittee. and Illuminating Engineering Society of North America., eds. IESNA approved method for total luminous flux measurement of lamps using an integrating sphere photometer. New York, NY: IES, 2007.

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Book chapters on the topic "Flux lumineux"

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Gooch, Jan W. "Flux, Luminous." In Encyclopedic Dictionary of Polymers, 319. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_5182.

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Gooch, Jan W. "Luminous Flux." In Encyclopedic Dictionary of Polymers, 436. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_7070.

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Weik, Martin H. "luminous flux." In Computer Science and Communications Dictionary, 945. Boston, MA: Springer US, 2000. http://dx.doi.org/10.1007/1-4020-0613-6_10780.

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Kolka, Indrek. "Variable Flux of P Cygni in Continuum and Spectral Lines." In Physics of Luminous Blue Variables, 265–67. Dordrecht: Springer Netherlands, 1989. http://dx.doi.org/10.1007/978-94-009-1031-7_34.

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Sielachowska, M., and M. Zajkowski. "Assessment of Light Pollution Based on the Analysis of Luminous Flux Distribution in Sports Facilities." In Mechanisms and Machine Science, 139–50. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-13321-4_12.

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Sielachowska, Magdalena, Damian Tyniecki, and Maciej Zajkowski. "The Concept of Measuring Luminous Flux Distribution Emitted from Sports Facilities Using Unmanned Aerial Vehicles." In Lecture Notes in Electrical Engineering, 306–18. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-11187-8_26.

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Rammohan, A., C. Ramesh Kumar, and M. M. Rashidi. "High-Power LED Luminous Flux Estimation Using a Mathematical Model Incorporating the Effects of Heatsink and Fins." In Trends in Mathematics, 429–38. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-01123-9_42.

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Thao, Nguyen Thi Phuong, Miroslav Voznak, and Nguyen Doan Quoc Anh. "The Impact of Distance Between Two Phosphor Layers on Luminous Flux and Color Quality of Remote Phosphor Package." In Lecture Notes in Electrical Engineering, 242–49. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-69814-4_24.

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"Luminous flux." In Encyclopedic Dictionary of Polymers, 586. New York, NY: Springer New York, 2007. http://dx.doi.org/10.1007/978-0-387-30160-0_6960.

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"Flux, luminous." In Encyclopedic Dictionary of Polymers, 428. New York, NY: Springer New York, 2007. http://dx.doi.org/10.1007/978-0-387-30160-0_5098.

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Conference papers on the topic "Flux lumineux"

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Zajkowski, Maciej, Lukasz Budzynski, and Damian Tyniecki. "Luminous flux ring mixer." In 2016 IEEE Lighting Conference of the Visegrad Countries (Lumen V4). IEEE, 2016. http://dx.doi.org/10.1109/lumenv.2016.7745545.

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Lall, Pradeep, Hao Zhang, and Lynn Davis. "Prognostics Health Management Model for LED Package Failure Under Contaminated Environment." In ASME 2015 International Technical Conference and Exhibition on Packaging and Integration of Electronic and Photonic Microsystems collocated with the ASME 2015 13th International Conference on Nanochannels, Microchannels, and Minichannels. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/ipack2015-48724.

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The reliability consideration of LED products includes both luminous flux drop and color shift. Previous research either talks about luminous maintenance or color shift, because luminous flux degradation usually takes very long time to observe. In this paper, the impact of a VOC (volatile organic compound) contaminated luminous flux and color stability are examined. As a result, both luminous degradation and color shift had been recorded in a short time. Test samples are white, phosphor-converted, high-power LED packages. Absolute radiant flux is measured with integrating sphere system to calculate the luminous flux. Luminous flux degradation and color shift distance were plotted versus aging time to show the degradation pattern. A prognostic health management (PHM) method based on the state variables and state estimator have been proposed in this paper. In this PHM framework, unscented kalman filter (UKF) was deployed as the carrier of all states. During the estimation process, third order dynamic transfer function was used to implement the PHM framework. Both of the luminous flux and color shift distance have been used as the state variable with the same PHM framework to exam the robustness of the method. Predicted remaining useful life is calculated at every measurement point to compare with the tested remaining useful life. The result shows that state estimator can be used as the method for the PHM of LED degradation with respect to both luminous flux and color shift distance. The prediction of remaining useful life of LED package, made by the states estimator and data driven approach, falls in the acceptable error-bounds (20%) after a short training of the estimator.
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YAN, J. Y., H. LIU, W. Q. ZHAO, Y. SU, and L. JIANG. "LED FILAMENT STANDARD LAMPS FOR TOTAL LUMINOUS FLUX AND LUMINOUS INTENSITY." In Proceedings of the 29th Quadrennial Session of the CIE. International Commission on Illumination, CIE, 2019. http://dx.doi.org/10.25039/x46.2019.po114.

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Chen, William F., and K. W. E. Cheng. "Luminous flux meter failures and potential solution." In 2015 6th International Conference on Power Electronics Systems and Applications (PESA) - Advancement in Electric Transportation - Automotive, Vessel & Aircraft. IEEE, 2015. http://dx.doi.org/10.1109/pesa.2015.7398930.

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Li, Tiecheng, Jiangang Zhu, Muyao Ji, Fangsheng Lin, Biyong Huang, Ming Xia, Lei Lai, and Leibing Shi. "The measurement of luminous flux for single LEDs." In International Conference on Optical Instruments and Technology 2017: Optoelectronic Measurement Technology and System, edited by Jigui Zhu, Kexin Xu, Liquan Dong, Hwa-Yaw Tam, and Hai Xiao. SPIE, 2018. http://dx.doi.org/10.1117/12.2295606.

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Fiorentin, Pietro, and Alessandro Scroccaro. "Internal Traceability between Luminous Flux and Illuminance Standards." In 2008 IEEE Instrumentation and Measurement Technology Conference - I2MTC 2008. IEEE, 2008. http://dx.doi.org/10.1109/imtc.2008.4547018.

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Stepanek, Jaroslav, and Jan Skoda. "Dependence of luminous flux on light source position." In 2015 16th International Scientific Conference on Electric Power Engineering (EPE). IEEE, 2015. http://dx.doi.org/10.1109/epe.2015.7161152.

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Li, Tiecheng, Fangsheng Lin, Biyong Huang, Muyao Ji, Leibing Shi, Ming Xia, and Lei Lai. "The total luminous flux measurement of high-power LEDs." In Optoelectronic Devices and Integration, edited by Daoxin Dai, Xiao-Cong Yuan, and Zhiping Zhou. SPIE, 2019. http://dx.doi.org/10.1117/12.2543169.

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Dorosz, Jan, and Wladyslaw Dybczynski. "Transfer of luminous flux through optical fiber for illumination." In SPIE Proceedings, edited by Ryszard S. Romaniuk and Krzysztof T. Pozniak. SPIE, 2003. http://dx.doi.org/10.1117/12.531875.

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E. Bolzan, Thais, Bruno F. Almeida, Mateus O. K. Pereira, Renan R. Duarte, Vitor C. Bender, and Rafael A. Pinto. "Datasheet-based methodology for CCT and luminous flux estimation in mixed-LED lighting sources." In Congresso Brasileiro de Automática - 2020. sbabra, 2020. http://dx.doi.org/10.48011/asba.v2i1.1665.

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This work proposes a datasheet-based methodology to estimate the correlated color temperature (CCT) and the luminous flux of one or a combination of multiple white Light-Emitting Diodes (LEDs). This methodology is based on the interaction between the different domains (colorimetrical, optical, thermal and electrical) that control the LED's behavior. An experimental setup with LEDs of 4000K and 6500K CCT was built and tested under multiple operating conditions, in order to verify the accuracy of the proposed method. Results presented good correlation between estimated and measured data, with a maximum error of 1.05% for CCT and 3.13% for luminous flux.
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Reports on the topic "Flux lumineux"

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Davis, Lynn, Kelley Rountree, and Karmann Mills. Luminous Flux and Chromaticity Maintenance for Select High-Power Color Light-Emitting Diodes. Office of Scientific and Technical Information (OSTI), July 2018. http://dx.doi.org/10.2172/1512374.

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Kelley, Edward F., Karl Lang, Louis D. Silverstein, and Michael H. Brill. A rational methodology for estimating the luminous flux based upon color primaries from digital projection displays. Gaithersburg, MD: National Institute of Standards and Technology, 2009. http://dx.doi.org/10.6028/nist.ir.6657.

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