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Area Lighting / Radiation, quantities and units

IEV ref845-01-38

Symbol
Ev
E

en
illuminance (at a point of a surface)
quotient of the luminous flux dΦv incident on 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 incident 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

E v = d Φ v dA = 2πsr L v cosθdΩ MathType@MTEF@5@5@+=feaagCart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHXgaruavP1wzZbItLDhis9wBH5garmWu51MyVXgarqqtubsr4rNCHbGeaGqipG0dh9qqWrVepG0dbbL8F4rqqrVepeea0xe9LqFf0xc9q8qqaqFn0lXdHiVcFbIOFHK8Feea0dXdar=Jb9hs0dXdHuk9fr=xfr=xfrpeWZqaaiqaciWacmGadaGadeaabaGaaqaaaOqaaiaadweadaWgaaWcbaGaaeODaaqabaGccqGH9aqpdaWcaaqaaiaabsgacqqHMoGrdaWgaaWcbaGaaeODaaqabaaakeaacaqGKbGaamyqaaaacqGH9aqpdaWdraqaaiaadYeadaWgaaWcbaGaaeODaaqabaGccqGHflY1ciGGJbGaai4BaiaacohacqaH4oqCcqGHflY1caqGKbGaeuyQdCfaleaacaaIYaacdaGae8hWdaNaae4CaiaabkhaaeqaniabgUIiYdaaaa@52A8@

unit: lx = lm • m-2


fr
éclairement (lumineux) (en un point d'une surface) m
quotient du flux lumineux dΦv reçu par 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 · dΩLv est la luminance au point donné dans les diverses directions des faisceaux élémentaires incidents d'angle solide dΩ, et θ est l'angle entre chacun de ces faisceaux et la normale à la surface au point donné

E v = d Φ v dA = 2πsr L v cosθdΩ MathType@MTEF@5@5@+=feaagCart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHXgaruavP1wzZbItLDhis9wBH5garmWu51MyVXgarqqtubsr4rNCHbGeaGqipG0dh9qqWrVepG0dbbL8F4rqqrVepeea0xe9LqFf0xc9q8qqaqFn0lXdHiVcFbIOFHK8Feea0dXdar=Jb9hs0dXdHuk9fr=xfr=xfrpeWZqaaiqaciWacmGadaGadeaabaGaaqaaaOqaaiaadweadaWgaaWcbaGaaeODaaqabaGccqGH9aqpdaWcaaqaaiaabsgacqqHMoGrdaWgaaWcbaGaaeODaaqabaaakeaacaqGKbGaamyqaaaacqGH9aqpdaWdraqaaiaadYeadaWgaaWcbaGaaeODaaqabaGccqGHflY1ciGGJbGaai4BaiaacohacqaH4oqCcqGHflY1caqGKbGaeuyQdCfaleaacaaIYaacdaGae8hWdaNaae4CaiaabkhaaeqaniabgUIiYdaaaa@52A8@

unité: lx = lm • m-2


ar
إستنـارة (عند نقطة لسطح)
إستضاءة (عند نقطة لسطح)

de
Beleuchtungsstärke (an einem Punkt einer Oberfläche), f

es
iluminancia

fi
valaistusvoimakkuus

it
illuminamento

ko
조도, 표면의 한점

ja
照度

no
nb belysningsstyrke, illuminans, belysningstetthet

nn belysningsstyrke, illuminans, belysningstettleik

pl
natężenie oświetlenia (w danym punkcie powierzchni)

pt
iluminância (num ponto de uma superfície)

sr
осветљеност , <у датој тачки површине> ж јд

sv
belysningsstyrka
illuminans

Publication date: 1987
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