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Area Lighting / Radiation, quantities and units

IEV ref845-01-48

Symbol
Mv
M

en
luminous exitance (at a point of a surface)
quotient of the luminous flux dΦv leaving an element of the surface containing the point, by the area dA of that element

Equivalent definition. Integral, taken over the hemisphere visible from the given point, of the expression Lv • cos θ · dΩ, where Lv is the luminance at the given point in the various directions of the emitted elementary beams of solid angle dΩ, and θ is the angle between any of these beams and the normal to the surface at the given point

M v = d Φ v dA = 2πsr L v cosθd Ω MathType@MTEF@5@5@+=feaagCart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHXgaruavP1wzZbItLDhis9wBH5garmWu51MyVXgarqqtubsr4rNCHbGeaGqipG0dh9qqWrVepG0dbbL8F4rqqrVepeea0xe9LqFf0xc9q8qqaqFn0lXdHiVcFbIOFHK8Feea0dXdar=Jb9hs0dXdHuk9fr=xfr=xfrpeWZqaaiqaciWaamGadaGadeaabaGaaqaaaOqaaiaad2eadaWgaaWcbaGaaeODaaqabaGccqGH9aqpdaWcaaqaaiaabsgacqqHMoGrdaWgaaWcbaGaaeODaaqabaaakeaacaqGKbGaamyqaaaacqGH9aqpdaWdraqaaiaadYeadaWgaaWcbaGaaeODaaqabaGccqGHflY1ciGGJbGaai4BaiaacohacqaH4oqCcqGHflY1caqGKbaaleaacaaIYaGaeqiWdaNaae4CaiaabkhaaeqaniabgUIiYdGccqqHPoWvaaa@52B2@

unit: lm · m-2


fr
exitance lumineuse (en un point d'une surface) f
quotient du flux lumineux dΦv quittant un élément de la surface contenant le point, par l'aire dA de cet élément

Définition équivalente. Intégrale, étendue à l'hémisphère visible depuis le point donné, de l'expression Lv • cos θ · dΩ, où Lv est la luminance au point donné dans les diverses directions des faisceaux élémentaires émis d'angle solide dΩ, et θ est l'angle entre chacun de ces faisceaux et la normale à la surface au point donné

M v = d Φ v dA = 2πsr L v cosθd Ω MathType@MTEF@5@5@+=feaagCart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHXgaruavP1wzZbItLDhis9wBH5garmWu51MyVXgarqqtubsr4rNCHbGeaGqipG0dh9qqWrVepG0dbbL8F4rqqrVepeea0xe9LqFf0xc9q8qqaqFn0lXdHiVcFbIOFHK8Feea0dXdar=Jb9hs0dXdHuk9fr=xfr=xfrpeWZqaaiqaciWaamGadaGadeaabaGaaqaaaOqaaiaad2eadaWgaaWcbaGaaeODaaqabaGccqGH9aqpdaWcaaqaaiaabsgacqqHMoGrdaWgaaWcbaGaaeODaaqabaaakeaacaqGKbGaamyqaaaacqGH9aqpdaWdraqaaiaadYeadaWgaaWcbaGaaeODaaqabaGccqGHflY1ciGGJbGaai4BaiaacohacqaH4oqCcqGHflY1caqGKbaaleaacaaIYaGaeqiWdaNaae4CaiaabkhaaeqaniabgUIiYdGccqqHPoWvaaa@52B2@

unité: lm · m-2


ar
مخرج إضاءة (عند نقطة لسطح)

de
spezifische Lichtausstrahlung (von einem Punkt einer Oberfläche), f

es
exitancia luminosa

fi
valoeksitanssi

it
emettenza lnminosa

ko
광속 발산도, 표면 한 점

ja
光束発散度

no
nb lyseksitans

nn lyseksitans

pl
egzytancja świetlna (w danym punkcie powierzchni)

pt
emitância luminosa (num ponto de uma superfície)

sr
емисивност светлости , <у тачки површине> ж јд
специфично исијавање светлости, с јд

sv
ljusexitans

Publication date: 1987
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