IEVref:845-21-072ID:
Language:enStatus: Standard
Term: luminous exposure
Synonym1: light exposure
[Deprecated]
Synonym2:
Synonym3:
Symbol: Hv
H
Definition: density of incident luminous energy with respect to area at a point on a real or imaginary surface

H v = d Q v dA MathType@MTEF@5@5@+= feaagKart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHX garuavP1wzZbItLDhis9wBH5garmWu51MyVXgaruWqVvNCPvMCG4uz 3bqee0evGueE0jxyaibaieYdi9WrpeeC0lXdh9vqqj=hEeea0xXdbb a9frFj0=OqFfea0dXdd9vqaq=JfrVkFHe9pgea0dXdar=Jb9hs0dXd bPYxe9vr0=vr0=vqpWqaaeaaciWacmGadaGadeaaeaGaauaaaOqaai aadIeadaWgaaWcbaGaaeyzaaqabaGccqGH9aqpdaWcaaqaaiaabsga caWGrbWaaSbaaSqaaiaabwgaaeqaaaGcbaGaaeizaiaadgeaaaaaaa@3EA2@

where Qv is luminous energy and A is the area on which the luminous energy is incident

Note 1 to entry: The term "light exposure" is no longer used.

Note 2 to entry: Luminous exposure can be derived from the spectral radiant exposure distribution by

H v  =  K m 0 H e,λ (λ)V(λ)dλ MathType@MTEF@5@5@+= feaagKart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHX garuavP1wzZbItLDhis9wBH5garmWu51MyVXgaruWqVvNCPvMCG4uz 3bqee0evGueE0jxyaibaieYdi9WrpeeC0lXdh9vqqj=hEeea0xXdbb a9frFj0=OqFfea0dXdd9vqaq=JfrVkFHe9pgea0dXdar=Jb9hs0dXd bPYxe9vr0=vr0=vqpWqaaeaaciWacmGadaGadeaaeaGaauaaaOqaaa baaaaaaaaapeGaamisamaaBaaaleaacaqG2baabeaakiaacckacqGH 9aqpcaGGGcGaam4samaaBaaaleaacaqGTbaabeaak8aadaWdXbqaai aadIeadaWgaaWcbaGaaeyzaiaabYcacqaH7oaBaeqaaaqaaiaaicda aeaacqGHEisPa0Gaey4kIipakiaacIcapeGaeq4UdW2daiaacMcaca aMc8UaamOvaiaacIcacqaH7oaBcaGGPaGaaGPaV=qacaqGKbGaeq4U dWgaaa@5434@

where Km is maximum luminous efficacy, He,λ(λ) is the spectral radiant exposure at wavelength λ and V(λ) is spectral luminous efficiency. Integral limits can be confined depending on the spectral responsivity of the detectors used as a sensor.

Note 3 to entry: The corresponding radiometric quantity is "radiant exposure". The corresponding quantity for photons is "photon exposure"

Note 4 to entry: The luminous exposure is expressed in lux second (lx·s = lm·s·m−2).

Note 5 to entry: This entry was numbered 845-01-43 in IEC 60050-845:1987.


Publication date:2020-12
Source
Replaces:
Internal notes:
CO remarks:
TC/SC remarks:
VT remarks:
Domain1:
Domain2:
Domain3:
Domain4:
Domain5: