relative spectral fluorescence distribution

relative fluorescence spectrum

F(λ)

quotient of the spectral distribution of radiance due to fluorescence at wavelength λ and the sum of the tabulated values of this distribution across the fluorescence band

Note 1 to entry:
Fluorescence is understood to include both fluorescent and phosphorescent phenomena with time constants short enough to be ignored for the application.

Note 2 to entry: The relative spectral fluorescence distribution, F(λ), when multiplied by the spectral external radiant efficiency of the fluorescent specimen, Q, for excitation at wavelength, μ, gives the bispectral luminescent radiance factor, β_L,λ(μ), of a photoluminescent material according to:
β_L,λ(μ) = F(λ)⋅Q(μ)

Note 3 to entry: The relative spectral fluorescence distribution has unit one.