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isotropic diffuse reflection
diffuse reflection in which the spatial distribution of the reflected radiation is such that the radiance or luminance is the same in all directions in the hemisphere into which the radiation is reflected
Note 1 to entry: This entry was numbered 845-04-51 in IEC 60050-845:1987.
Note 2 to entry: This entry was numbered 17-625 in CIE S 017:2011.