Queries, comments, suggestions? Please contact us.



Area Lighting / Radiation, quantities and units

IEV ref845-01-47

Symbol
Me
M

en
radiant exitance (at a point of a surface)
quotient of the radiant flux dΦe 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 Le • cos θ · dΩ, where Le is the radiance 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 e = d Φ e dA = 2πsr L e cosθd Ω MathType@MTEF@5@5@+= feaagKart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHX garuavP1wzZbItLDhis9wBH5garmWu51MyVXgarqqtubsr4rNCHbGe aGqipG0dh9qqWrVepG0dbbL8F4rqqrVepeea0xe9LqFf0xc9q8qqaq Fn0lXdHiVcFbIOFHK8Feea0dXdar=Jb9hs0dXdHuk9fr=xfr=xfrpe WZqaaiqaciWacmGadaGadeaabaGaaqaaaOqaaiaad2eadaWgaaWcba GaaeyzaaqabaGccqGH9aqpdaWcaaqaaiaabsgacqqHMoGrdaWgaaWc baGaaeyzaaqabaaakeaacaqGKbGaamyqaaaacqGH9aqpdaWdraqaai aadYeadaWgaaWcbaGaaeyzaaqabaGccqGHflY1caqGJbGaae4Baiaa bohacqaH4oqCcqGHflY1caqGKbaaleaacaaIYaacdaGae8hWdaNaae 4CaiaabkhaaeqaniabgUIiYdGccqqHPoWvaaa@5284@

unit : W • m-2


fr
exitance énergétique (en un point d'une surface) f
quotient du flux énergétique dΦe 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 Le • cos θ · dΩ, où Le est la luminance énergétique 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 e = d Φ e dA = 2πsr L e cosθd Ω MathType@MTEF@5@5@+= feaagKart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHX garuavP1wzZbItLDhis9wBH5garmWu51MyVXgarqqtubsr4rNCHbGe aGqipG0dh9qqWrVepG0dbbL8F4rqqrVepeea0xe9LqFf0xc9q8qqaq Fn0lXdHiVcFbIOFHK8Feea0dXdar=Jb9hs0dXdHuk9fr=xfr=xfrpe WZqaaiqaciWacmGadaGadeaabaGaaqaaaOqaaiaad2eadaWgaaWcba GaaeyzaaqabaGccqGH9aqpdaWcaaqaaiaabsgacqqHMoGrdaWgaaWc baGaaeyzaaqabaaakeaacaqGKbGaamyqaaaacqGH9aqpdaWdraqaai aadYeadaWgaaWcbaGaaeyzaaqabaGccqGHflY1caqGJbGaae4Baiaa bohacqaH4oqCcqGHflY1caqGKbaaleaacaaIYaacdaGae8hWdaNaae 4CaiaabkhaaeqaniabgUIiYdGccqqHPoWvaaa@5284@

unité : W • m-2


ar
مخرج مشع (عند نقطة لسطح)

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

es
exitancia radiante

fi
säteilyeksitanssi

it
emettenza energetica

ko
방사 발산도, 표면 한 점

ja
放射発散度

no
nb strålingseksitans, utstrålingstetthet

nn strålingseksitans, utstrålingstetthet

pl
egzytancja energetyczna (w danym punkcie powierzchni)

pt
emitância radiante (num ponto de uma superfície)

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

sv
utstrålningstäthet
strålningsexitans

Publication date: 1987
Copyright © IEC 2020. All Rights Reserved.