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17-24-072

transmittance optical density

optical density

transmittance density

decadic absorbance

Dτ

logarithm to base 10 of the reciprocal of the transmittance, τ

Dτ = −log10 τ

Note 1 to entry: The transmittance optical density has unit one.

Note 2 to entry: This entry was numbered 845-04-66 in IEC 60050-845:1987.

Note 3 to entry: This entry was numbered 17-843 in CIE S 017:2011.

Publication date: 2020-12
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