IEVref:845-24-088ID:
Language:enStatus: Standard
Term: spectral internal transmittance, <of a homogeneous non-diffusing layer>
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Symbol: τi(λ)
Definition: quotient of the spectral radiant flux reaching the exit internal surface of the layer and the spectral flux that enters into the layer after crossing the entry surface

Note 1 to entry: For a given layer, the spectral internal transmittance depends on the path length of the radiation in the layer, and hence, in particular, on the angle of incidence.

Note 2 to entry: The spectral internal transmittance has unit one.

Note 3 to entry: This entry was numbered 845-04-81 in IEC 60050-845:1987.


Publication date:2020-12
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