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17-22-090

contrast sensitivity

Sc

reciprocal of the least perceptible luminance contrast, usually expressed as L/ΔLth, where L is the average luminance and ΔLth is the luminance difference threshold

Note 1 to entry: The value of Sc depends on a number of factors including the luminance, the viewing conditions and the state of adaptation.

Note 2 to entry: The contrast sensitivity has unit one.

Note 3 to entry: This entry was numbered 845-02-48 in IEC 60050-845:1987.

Note 4 to entry: This entry was numbered 17-255 in CIE S 017:2011.

Publication date: 2020-12
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