Chromaticity Computational Forms for Sources from 1600 to 3200 K including 2854 K (Source A), and Sources B, C, and D6500 (16, 20, and 40 Ordinates).
HARDESTY (GEORGE K C) ANNAPOLIS MD
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Three sets of computational forms are presented to facilitate the computation of Commission Internationale de LEclarige chromaticity coordinates of signal devices and luminous transmittance or reflectance values of colored materials. In each set of 16,20, or 40 spectral ordinate forms, there is a form specific to a particular color temperature as applied to a tungsten lamp. The usual assumption is made that the spectral distribution of energy of a real tungsten source is proportional to that of a full radiator blackbody of the same color temperature. In addition, there are forms for the standardized non-Planckian sources B, C, and D6500 as well as for a theoretical equal energy source. The 40 ordinate 10 nanometer forms cover the spectral range 380 to 770 nanometer while the 16 and 20 ordinate 20-nanometer interval forms cover the span 400 to 700 and 380 to 670 nanometer, respectively. These forms are intended to correspond with the wave length sampling intervals of a number of contemporary spectral analyzing equipments or to practical limitations on data taken from continuous graphic spectral recordings. The use of these forms with transmittance and reflectance types of spectrophotometric data, and also spectroradiometric data is exemplified. Author