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Area Broadcasting: Sound, television, data / Terms specific to colour television systems

IEV ref723-08-27

Symbol
Ф

en
luminous flux (radiated by a source)
quantity defined by

Φ= K m 0 V(λ)P(λ) dλ MathType@MTEF@5@5@+= feaagKart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHX garuavP1wzZbItLDhis9wBH5garmWu51MyVXgaruWqVvNCPvMCG4uz 3bqee0evGueE0jxyaibaieYdi9WrpeeC0lXdi9qqqj=hEeeu0lXdbb a9frFj0xb9Lqpepeea0xd9s8qiYRWxGi6xij=hbba9q8aq0=yq=He9 q8qiLsFr0=vr0=vr0db8meaabaGacmGadiWaaiWabaabaiaafaaake aacqqHMoGrcqGH9aqpcaWGlbWaaSbaaSqaaiaab2gaaeqaaOWaa8qC aeaacaWGwbGaaiikaiabeU7aSjaacMcacaWGqbGaaiikaiabeU7aSj aacMcaaSqaaiaaicdaaeaacqGHEisPa0Gaey4kIipakiGacsgacqaH 7oaBaaa@4D09@

where:

P(λ) is the power spectral density radiated by the source at wavelength λ;
V(λ) is the spectral luminous efficiency for photopic vision;
Km is a constant

Note – In the SI system of units, where P(λ) is expressed in watts per metre, the luminous flux Ф is expressed in lumens, and Km = 683 lm/W.


fr
flux lumineux (rауоnné par une source) m
grandeur définie par:

Φ= K m 0 V(λ)P(λ) dλ MathType@MTEF@5@5@+= feaagKart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHX garuavP1wzZbItLDhis9wBH5garmWu51MyVXgaruWqVvNCPvMCG4uz 3bqee0evGueE0jxyaibaieYdi9WrpeeC0lXdi9qqqj=hEeeu0lXdbb a9frFj0xb9Lqpepeea0xd9s8qiYRWxGi6xij=hbba9q8aq0=yq=He9 q8qiLsFr0=vr0=vr0db8meaabaGacmGadiWaaiWabaabaiaafaaake aacqqHMoGrcqGH9aqpcaWGlbWaaSbaaSqaaiaab2gaaeqaaOWaa8qC aeaacaWGwbGaaiikaiabeU7aSjaacMcacaWGqbGaaiikaiabeU7aSj aacMcaaSqaaiaaicdaaeaacqGHEisPa0Gaey4kIipakiGacsgacqaH 7oaBaaa@4D09@

où:

P(λ) est la puissance spectrique rayonnée par la source à la longueur d'onde λ;
V(λ) est l'efficacité lumineuse relative spectrale en vision photoptique;
Km est une constante

Note – Dans le système d'unités SI, où P(λ) est exprimé en watts par mètre, le flux lumineux Ф s'exprime en lumens, et Km = 683 lm/W.


ar
تدفق ضوئي (المنبعثة من مصدر)

de
Lichtstrom, <abgestrahlt von einer Lichtquelle> m

es
flujo luminoso (radiado por una fuente)

it
flusso luminoso

ko
광속, <광원 방사>

ja
光束

pl
strumień świetlny promieniowany przez źródło
strumień świetlny

pt
fluxo luminoso (radiado por uma fonte)

sv
ljusflöde

Publication date: 1997-03
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