uniformity ratio of illuminance
quotient of minimum illuminance and average illuminance on a surface
Note 1 to entry: The illuminance uniformity has unit one.
Note 2 to entry: This entry was numbered 845-09-58 in IEC 60050-845:1987.
Note 3 to entry: This entry was numbered 17-552 and 17-1372 in CIE S 017:2011.