AQ-00073-000, Rev. 7 32
Specular Reflection.
Reflection without diffusion, in accordance with the laws of optical reflec-
tion, as in a mirror.
Total Transmittance.
The ratio of the flux transmitted at all forward angles to the incident flux.
Transmittance.
The ratio of transmitted flux to incident flux, under specified geometric and spec-
tral conditions.
Transmittance Factor.
Ratio of the flux transmitted by the specimen to the flux transmitted by the
perfect transmitting diffuser under the same geometric and spectral conditions of measurement.
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