CIE提案簡易けい光測色法の測色精度

Abstract

The accuracy of CIE proposed one monochromator method was studied on the basis of the two monochromator method regarding the Colorimetry of fluorescent materials. In all the experiments, the fluorescent materials were always illuminated normally and viewed at 45° from the normal.The results studied are summarized as follows:(1) A theoretical account is given to estimate the accuracy of the CIE proposed method on the basis of the measurement by use of the two-monochromator method. The accuracy is discussed on the total, the reflected, and the fluorescent spectral radiance factor (SRF), respectively.(2) It is confirmed that the CIE proposed method is able to give the total SRF's of fluorescent materials under D65 within an average deviation of 1 % from those measured and estimated by the two-monochromator method. This average deviation of the total SRF's corresponds to the color difference less than 1 CIE LUV unit. In the overlapping region by excitation and luminescence, however, the deviation of the reflected SRF shows an error from 2 to 4 % in some fluorescent materials, and the error of Q (μ) function (fluorescence radiant efficiency) is also significant.(3) A simplified procedure is given for estimating Q (μ) function without using the spectral characteristic of the light receiver to be used. This simplification in the CIE proposed method is used provided that the colorimetric accuracy is allowed within the color difference of 1.5 CIE LUV unit.