Abstract

A method is proposed for the quantitative assessment of artificial light sources. Within the visible range the index of metamerism of a number of metameric sample pairs serves as a criterion for the best fit to the standard illuminant D65. For the untraviolet range the fluorescence intensity of a white sample is calculated as a test characteristic. A wide number of artificial light sources are assessed by calculation. The results are compared with assessments made by other criteria already published. The proposed method gives significant data and is therefore likely to be suitable for use in standards.

© 1973 Optical Society of America

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