IEVref:845-04-98ID:
Language:enStatus: Obsolete
Term: coefficient of retroreflected luminance (of a plane retroreflecting surface)
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Symbol: RL
Definition: quotient of the luminance L of the retroreflective surface in the direction of observation by the illuminance X at the retroreflector on a plane perpendicular to the direction of the incident light

X

unit: cd • m -2 • lx -1

NOTE – This quantity is 'particularly suitable for describing materials in sheet form.


Publication date:1987
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