Assessment of the ultraviolet range of artificial light sources for the best fit to standard illuminant d65.

For color matching and color measurement of fluorescent samples, artificial light sources are required that, have an irradiance distribution of maximum possible fit to that of the standard illuminant D65, even in the ultraviolet-wavelength range. Expanding an earlier study, calculations are made as to how much more information is obtained when the assessment of the uv range is carried out with not just one, but a larger number of fluorescent samples. Thirty-seven irradiance distributions are tested with thirty-one hypothetical samples. It seems most practical to use three samples for the assessment.