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Area Lighting / Radiation, quantities and units

IEV ref845-01-35

Symbol
Lv
L

en
luminance (in a given direction, at a given point of a real or imaginary surface)
quantity defined by the formula L v = d Φ v dAcosθdΩ MathType@MTEF@5@5@+=feaagCart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHXgaruavP1wzZbItLDhis9wBH5garmWu51MyVXgarqqtubsr4rNCHbGeaGqipG0dh9qqWrVepG0dbbL8F4rqqrVepeea0xe9LqFf0xc9q8qqaqFn0lXdHiVcFbIOFHK8Feea0dXdar=Jb9hs0dXdHuk9fr=xfr=xfrpeWZqaaiqaciWacmGadaGadeaabaGaaqaaaOqaaiaadYeadaWgaaWcbaGaaeODaaqabaGccqGH9aqpdaWcaaqaaiaabsgacqqHMoGrdaWgaaWcbaGaaeODaaqabaaakeaacaqGKbGaamyqaiabgwSixlGacogacaGGVbGaai4CaiabeI7aXjabgwSixlaabsgacqqHPoWvaaaaaa@4935@ where dΦv is the luminous flux transmitted by an elementary beam passing through the given point and propagating in the solid angle dΩ containing the given direction; dA is the area of a section of that beam containing the given point; θ is the angle between the normal to that section and the direction of the beam

unit: cd · m-2 = lm • m-2 • sr -1

Note – See notes 1 to 5 to 845-01-34.


fr
luminance (lumineuse), f
luminance visuelle (dans une direction donnée, en un point donné d'une surface réelle ou fictive) f
grandeur définie par la formule L v = d Φ v dAcosθdΩ MathType@MTEF@5@5@+=feaagCart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHXgaruavP1wzZbItLDhis9wBH5garmWu51MyVXgarqqtubsr4rNCHbGeaGqipG0dh9qqWrVepG0dbbL8F4rqqrVepeea0xe9LqFf0xc9q8qqaqFn0lXdHiVcFbIOFHK8Feea0dXdar=Jb9hs0dXdHuk9fr=xfr=xfrpeWZqaaiqaciWacmGadaGadeaabaGaaqaaaOqaaiaadYeadaWgaaWcbaGaaeODaaqabaGccqGH9aqpdaWcaaqaaiaabsgacqqHMoGrdaWgaaWcbaGaaeODaaqabaaakeaacaqGKbGaamyqaiabgwSixlGacogacaGGVbGaai4CaiabeI7aXjabgwSixlaabsgacqqHPoWvaaaaaa@4935@ où dΦv est le flux lumineux transmis par un faisceau élémentaire passant par le point donné et se propageant dans l'angle solide dΩ contenant la direction donnée; dA est l'aire d'une section de ce faisceau au point donné; θ est l'angle entre la normale à cette section et la direction du faisceau
unité: cd · m-2 = lm • m-2 • sr -1

Note – Voir les notes 1 à 5 à 845-01-34.


ar
إضاءة (فى إتجاه معين عند نقطة معينة لسطح حقيقى أوتخيلى)

de
Leuchtdichte (in einer gegebenen Richtung, in einem gegebenen Punkt einer realen oder imaginären Oberfläche), f

es
luminancia

fi
luminanssi

it
luminanza

ko
휘도, 주어진 방향에서

ja
輝度

no
nb luminans

nn luminans

pl
luminancja świetlna (w określonym kierunku)

pt
luminância (numa dada direcção num dado ponto de uma superfície real ou fictícia)

sr
сјај , <у датом правцу и датој тачки стварне или замишљене површине> м јд
сјај светлости, м јд
луминанција , ж јд

sv
luminans

Publication date: 1987
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