Colorimetry of Fluorescent Specimens: A State-of-the-Art Report

摘要

Accurate measurement of the color of fluorescent specimens, independent of instrument parameters, is very difficult because such materials absorb radiant power in one wavelenght region (the excitation region) and emit power in a region of longer wavelengths (the emission region). There is a complicating overlapping wavelength region in which both excitation and emission take place. Conformance to better color specifications requires irradiation by a source identical to CIE standard daylight illuminant D65, but existing instrument daylight simulators provide a widely discrepant range of results. Calculation methods are described allowing these results to be converted to those for D65 by computation. Instrument modifications and accompanying material standards are proposed for direct measurements corresponding to D65 irradiation. A proposed field test method and instrument are described. Recommendations for implementing these techniques are made for both short-term and long-term time frames.