Queries, comments, suggestions? Please contact us.



Area Lighting / Radiation, quantities and units

IEV ref 845-21-040

Symbol
Φp
Φ

en
photon flux
rate of photon number per time interval

Φp=dNpdtMathType@MTEF@5@5@+=feaagCart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHXgaruavP1wzZbItLDhis9wBH5garmWu51MyVXgarqqtubsr4rNCHbGeaGqipG0dh9qqWrVepG0dbbL8F4rqqrVepeea0xe9LqFf0xc9q8qqaqFn0lXdHiVcFbIOFHK8Feea0dXdar=Jb9hs0dXdHuk9fr=xfr=xfrpeWZqaaeaaciWacmGadaGadeaabaGaaqaaaOqaaiabfA6agnaaBaaaleaacaqGWbaabeaakiabg2da9maalaaabaGaaeizaiaad6eadaWgaaWcbaGaaiiCaaqabaaakeaacaqGKbGaamiDaaaaaaa@3DCB@

where Np is photon number, transmitted or received, and t is time

Note 1 to entry: Photon flux, Φp, is related to radiant flux, Φe, of monochromatic radiation by

Φ p = Φ e hν MathType@MTEF@5@5@+= feaagKart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHX garuavP1wzZbItLDhis9wBH5garmWu51MyVXgaruWqVvNCPvMCG4uz 3bqee0evGueE0jxyaibaieYdi9WrpeeC0lXdh9vqqj=hEeea0xXdbb a9frFj0=OqFfea0dXdd9vqaq=JfrVkFHe9pgea0dXdar=Jb9hs0dXd bPYxe9vr0=vr0=vqpWqaaeaaciWacmGadaGadeaaeaGaauaaaOqaai abfA6agnaaBaaaleaacaqGWbaabeaakiabg2da9maalaaabaGaeuOP dy0aaSbaaSqaaiaabwgaaeqaaaGcbaGaamiAaiaaykW7cqaH9oGBaa GaaGPaVdaa@4325@

where h is the Planck constant, and ν is the frequency of the corresponding electromagnetic wave.

Note 2 to entry: For a beam of radiation whose spectral distribution is d Φ e ( λ ) dλ MathType@MTEF@5@5@+=feaagCart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHXgaruavP1wzZbItLDhis9wBH5garmWu51MyVXgarqqtubsr4rNCHbGeaGqipG0dh9qqWrVepG0dbbL8F4rqqrVepeea0xe9LqFf0xc9q8qqaqFn0lXdHiVcFbIOFHK8Feea0dXdar=Jb9hs0dXdHuk9fr=xfr=xfrpeWZqaaiqaciWacmGadaGadeaabaGaaqaaaOqaamaalaaabaGaaeizaiabfA6agnaaBaaaleaacaqGLbaabeaakmaabmaabaGaeq4UdWgacaGLOaGaayzkaaaabaGaaeizaiabeU7aSbaaaaa@3EB7@ or d Φ e ( ν ) dν MathType@MTEF@5@5@+=feaagCart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHXgaruavP1wzZbItLDhis9wBH5garmWu51MyVXgarqqtubsr4rNCHbGeaGqipG0dh9qqWrVepG0dbbL8F4rqqrVepeea0xe9LqFf0xc9q8qqaqFn0lXdHiVcFbIOFHK8Feea0dXdar=Jb9hs0dXdHuk9fr=xfr=xfrpeWZqaaiqaciWacmGadaGadeaabaGaaqaaaOqaamaalaaabaGaaeizaiabfA6agnaaBaaaleaacaqGLbaabeaakmaabmaabaGaamODaaGaayjkaiaawMcaaaqaaiaabsgacaWG2baaaaaa@3D45@ , the photon flux can be expressed by Φ p = 0 d Φ e (λ) dλ λ h c 0 dλ= 0 d Φ e (ν) dν 1 hν dν MathType@MTEF@5@5@+=feaagCart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHXgaruavP1wzZbItLDhis9wBH5garmWu51MyVXgarqqtubsr4rNCHbGeaGqipG0dh9qqWrVepG0dbbL8F4rqqrVepeea0xe9LqFf0xc9q8qqaqFn0lXdHiVcFbIOFHK8Feea0dXdar=Jb9hs0dXdHuk9fr=xfr=xfrpeWZqaaeaaciWacmGadaGadeaabaGaaqaaaOqaaiabfA6agnaaBaaaleaacaqGWbaabeaakiabg2da9maapedabaWaaSaaaeaacaqGKbGaeuOPdy0aaSbaaSqaaiGacwgaaeqaaOGaaiikaiabeU7aSjaacMcaaeaacaqGKbGaeq4UdWgaaaWcbaGaaGimaaqaaiabg6HiLcqdcqGHRiI8aOGaeyyXIC9aaSaaaeaacqaH7oaBaeaacaWGObGaam4yamaaBaaaleaacaaIWaaabeaaaaGccaqGKbGaeq4UdWMaeyypa0Zaa8qmaeaadaWcaaqaaiaabsgacqqHMoGrdaWgaaWcbaGaciyzaaqabaGccaGGOaGaamODaiaacMcaaeaacaqGKbGaamODaaaaaSqaaiaaicdaaeaacqGHEisPa0Gaey4kIipakiabgwSixpaalaaabaGaaGymaaqaaiaadIgacaWG2baaaiaabsgacaWG2baaaa@6408@ , where h is Planck's constant and c0 is the speed of light in vacuum.

Note 3 to entry: The corresponding radiometric quantity is "radiant flux". The corresponding photometric quantity is "luminous flux".

Note 4 to entry: The photon flux is expressed in second to the power minus one (s−1).

Note 5 to entry: This entry was numbered 845-01-26 in IEC 60050-845:1987.


fr
flux photonique, m
taux du nombre de photons par intervalle de temps

Φp=dNpdtMathType@MTEF@5@5@+=feaagCart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHXgaruavP1wzZbItLDhis9wBH5garmWu51MyVXgarqqtubsr4rNCHbGeaGqipG0dh9qqWrVepG0dbbL8F4rqqrVepeea0xe9LqFf0xc9q8qqaqFn0lXdHiVcFbIOFHK8Feea0dXdar=Jb9hs0dXdHuk9fr=xfr=xfrpeWZqaaeaaciWacmGadaGadeaabaGaaqaaaOqaaiabfA6agnaaBaaaleaacaqGWbaabeaakiabg2da9maalaaabaGaaeizaiaad6eadaWgaaWcbaGaaiiCaaqabaaakeaacaqGKbGaamiDaaaaaaa@3DCB@

Np est le nombre de photons, transmis ou reçu, et t est le temps

Note 1 à l'article: Le flux photonique, Φp, est associé au flux énergétique, Φe, de rayonnement monochromatique, par

Φ p = Φ e hν MathType@MTEF@5@5@+= feaagKart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHX garuavP1wzZbItLDhis9wBH5garmWu51MyVXgaruWqVvNCPvMCG4uz 3bqee0evGueE0jxyaibaieYdi9WrpeeC0lXdh9vqqj=hEeea0xXdbb a9frFj0=OqFfea0dXdd9vqaq=JfrVkFHe9pgea0dXdar=Jb9hs0dXd bPYxe9vr0=vr0=vqpWqaaeaaciWacmGadaGadeaaeaGaauaaaOqaai abfA6agnaaBaaaleaacaqGWbaabeaakiabg2da9maalaaabaGaeuOP dy0aaSbaaSqaaiaabwgaaeqaaaGcbaGaamiAaiaaykW7cqaH9oGBaa GaaGPaVdaa@4325@

h est la constante de Planck, et ν est la fréquence de l'onde électromagnétique correspondante.

Note 2 à l'article: Pour un faisceau de rayonnement dont la répartition spectrale est d Φ e ( λ ) dλ MathType@MTEF@5@5@+=feaagCart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHXgaruavP1wzZbItLDhis9wBH5garmWu51MyVXgarqqtubsr4rNCHbGeaGqipG0dh9qqWrVepG0dbbL8F4rqqrVepeea0xe9LqFf0xc9q8qqaqFn0lXdHiVcFbIOFHK8Feea0dXdar=Jb9hs0dXdHuk9fr=xfr=xfrpeWZqaaiqaciWacmGadaGadeaabaGaaqaaaOqaamaalaaabaGaaeizaiabfA6agnaaBaaaleaacaqGLbaabeaakmaabmaabaGaeq4UdWgacaGLOaGaayzkaaaabaGaaeizaiabeU7aSbaaaaa@3EB7@ ou d Φ e ( ν ) dν MathType@MTEF@5@5@+=feaagCart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHXgaruavP1wzZbItLDhis9wBH5garmWu51MyVXgarqqtubsr4rNCHbGeaGqipG0dh9qqWrVepG0dbbL8F4rqqrVepeea0xe9LqFf0xc9q8qqaqFn0lXdHiVcFbIOFHK8Feea0dXdar=Jb9hs0dXdHuk9fr=xfr=xfrpeWZqaaiqaciWacmGadaGadeaabaGaaqaaaOqaamaalaaabaGaaeizaiabfA6agnaaBaaaleaacaqGLbaabeaakmaabmaabaGaamODaaGaayjkaiaawMcaaaqaaiaabsgacaWG2baaaaaa@3D45@ , le flux photonique peut être exprimé par Φ p = 0 d Φ e (λ) dλ λ h c 0 dλ= 0 d Φ e (ν) dν 1 hν dν MathType@MTEF@5@5@+=feaagCart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHXgaruavP1wzZbItLDhis9wBH5garmWu51MyVXgarqqtubsr4rNCHbGeaGqipG0dh9qqWrVepG0dbbL8F4rqqrVepeea0xe9LqFf0xc9q8qqaqFn0lXdHiVcFbIOFHK8Feea0dXdar=Jb9hs0dXdHuk9fr=xfr=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@6408@ , où h est la constante de Planck et c0 est la vitesse de la lumière dans le vide.

Note 3 à l'article: La grandeur radiométrique correspondante est le "flux énergétique". La grandeur photométrique correspondante est le "flux lumineux".

Note 4 à l'article: Le flux photonique est exprimé en seconde à la puissance moins un (s−1).

Note 5 à l'article: Cet article était numéroté 845-01-26 dans l'IEC 60050-845:1987.


ar
تدفق الفوتون

de
Photonenstrom, m

it
flusso fotonico

ko
광자속

ja
光子束
光子流

pl
strumień fotonów, m

pt
fluxo fotónico

zh
光子通量

Publication date: 2020-12
Copyright © IEC 2021. All Rights Reserved.