# 17-24-073

reflectance factor optical density

reflectance factor density

DR

logarithm to base 10 of the reciprocal of the reflectance factor, R
DR = −log10 R

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

Note 2 to entry: This entry was numbered 845-04-67 in IEC 60050-845:1987.

Note 3 to entry: This entry was numbered 17-1060 in CIE S 017:2011.

Publication date: 2020-12