Abstract
A practical method for evaluating the error caused by imperfect V (λ) matching is developed. The method uses the color correction factor (KHg) of a detector for a clear-bulb high pressure mercurylamp as its evaluation value. Using various spectral response data of 81 photometric detector models and of 77 actual detectors, the correlation between the value KHg, in addition to the evaluation value k (400-760 nm) of Japanese Industrial Standard (JIS-C-1609) and the evaluation value f1' recommended by CIE, and the color correction factors for 33 other kinds of discharge lamps is analysed. The results show that the value KHg obtained by this method gives as good a correlation with the maximum color correctionfactors for other discharge lamps as the evaluation value f1' does. The evaluation value k of JIS, on the other hand, gives poor correlation. Since the value KHg can be measured quickly using a standard incandescent lamp and a high pressure mercury lamp, this method is useful as a practical method for evaluating the spectral matching of photometric detectors.
