A Correlated Color Temperature for Illuminants (Classic Reprint)

A Correlated Color Temperature for Illuminants (Classic Reprint)
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Excerpt from A Correlated Color Temperature for Illuminants

In this paper are consid match exactly any of the’planckian colors, but whosebbler may-be definitely correlated with a Planckian color, The above definition of color temperature may theae extended as follows: Thew ideal correlated color temperature of a light source isthe absolute tem perature at which the Planckian radiator emits radiant ener eom p’etent to evoke a color which, of u all Planckian color’s’fimos elesely approximates the color evokedby’the source in question. Sti’jetly speaking, ideal correlated color temperatures can not.’ be computed because at the present time no computational method can be suceess fully defended on theoretical grounds. Ideal correlated ecler tom’s peratures may be approximated by direct observation under certain specific conditions; that is, the values may differ from the ideal correlated color temperature hy’the observational uncertainty. Ao cordingly, we shall call all color-temperature values representing non-planckian colors correlated color temperatures regardless of the method by which they were obtained provided they, are intended to approximate the ideal correlated color temperature.

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