IEVref:845-04-68ID:
Language:enStatus: Obsolete
Term: radiance factor (at a surface element of a non-self-radiating medium, in a given direction, under specified conditions of irradiation)
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Symbol: βe
β
Definition: ratio of the radiance of the surface element in the given direction to that of a perfect reflecting or transmitting diffuser identically irradiated

unit : 1

NOTE – For photoluminescent media, the radiance factor is the sum of two portions, the reflected radiance factor βs and the luminescent radiance factor βL : βe = βS + βL.


Publication date:1987
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