Queries, comments, suggestions? Please contact us.



Area Lighting / Radiation, quantities and units

IEV ref845-01-39

Symbol
Ep
E

en
photon irradiance (at a point of a surface)
quotient of the photon flux dΦp 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 Lp • cos θ · dΩ where Lp is the photon radiance 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 p = d Φ p dA = 2πsr L p cosθdΩ MathType@MTEF@5@5@+= feaagKart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHX garuavP1wzZbItLDhis9wBH5garmWu51MyVXgarqqtubsr4rNCHbGe aGqipG0dh9qqWrVepG0dbbL8F4rqqrVepeea0xe9LqFf0xc9q8qqaq Fn0lXdHiVcFbIOFHK8Feea0dXdar=Jb9hs0dXdHuk9fr=xfr=xfrpe WZqaaiqaciWacmGadaGadeaabaGaaqaaaOqaaiaadweadaWgaaWcba GaaeiCaaqabaGccqGH9aqpdaWcaaqaaiaabsgacqqHMoGrdaWgaaWc baGaaeiCaaqabaaakeaacaqGKbGaamyqaaaacqGH9aqpdaWdraqaai aadYeadaWgaaWcbaGaaeiCaaqabaGccqGHflY1caqGJbGaae4Baiaa bohacqaH4oqCcqGHflY1caqGKbGaeuyQdCfaleaacaaIYaacdaGae8 hWdaNaae4CaiaabkhaaeqaniabgUIiYdaaaa@5293@

unit: s-1 • m-2


fr
éclairement photonique (en un point d'une surface) m
quotient du flux photonique dΦp 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 Lp · cos θ · dΩ, où Lp est la luminance photonique 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 p = d Φ p dA = 2πsr L p cosθdΩ MathType@MTEF@5@5@+= feaagKart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHX garuavP1wzZbItLDhis9wBH5garmWu51MyVXgarqqtubsr4rNCHbGe aGqipG0dh9qqWrVepG0dbbL8F4rqqrVepeea0xe9LqFf0xc9q8qqaq Fn0lXdHiVcFbIOFHK8Feea0dXdar=Jb9hs0dXdHuk9fr=xfr=xfrpe WZqaaiqaciWacmGadaGadeaabaGaaqaaaOqaaiaadweadaWgaaWcba GaaeiCaaqabaGccqGH9aqpdaWcaaqaaiaabsgacqqHMoGrdaWgaaWc baGaaeiCaaqabaaakeaacaqGKbGaamyqaaaacqGH9aqpdaWdraqaai aadYeadaWgaaWcbaGaaeiCaaqabaGccqGHflY1caqGJbGaae4Baiaa bohacqaH4oqCcqGHflY1caqGKbGaeuyQdCfaleaacaaIYaacdaGae8 hWdaNaae4CaiaabkhaaeqaniabgUIiYdaaaa@5293@

unité: s-1 • m-2


ar
إشعاعية الفوتونات (عند نقطة لسطح)

de
Photonenbestrahlungsstärke (an einem Punkt einer Oberfläche), f

es
irradiancia fotónica

fi
fotoni-irradianssi

it
irradiamento fotonico

ko
광자 조도, 표면의 한점

ja
光子輝度

no
nb fotonirradians

nn fotonirradians

pl
natężenie napromienienia fotonowe (w danym punkcie powierzchni)

pt
irradiância fotónica (num ponto de uma superfície)

sr
озрачивање фотонима , <у датој тачки површине> с јд

sv
fotonirradians

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