visibility, <of a sign>
range of visual perception, normally measured in terms of the threshold distance, at which a sign becomes visible
Note 1 to entry: This entry was numbered 17-1400 in CIE S 017:2011.
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17-31-133
Publication date: 2020-12
Copyright © CIE 2020. All Rights Reserverd.
Copyright © CIE 2020. All Rights Reserverd.