regular transmittance


quotient of the regularly transmitted part of the (whole) transmitted flux and the incident flux

Note 1 to entry:
Transmittance, τ, is the sum of regular transmittance, τr, and diffuse transmittance, τd: τ = τr + τd.

Note 2 to entry: The regular transmittance has unit one.

Note 3 to entry: This entry was numbered 845-04-61 in IEC 60050-845:1987.

Note 4 to entry: This entry was numbered 17-1079 in CIE S 017:2011.

Publication date: 2020-12
Copyright © CIE 2020. All Rights Reserverd.