光源的显色性与显色指数

Color rendering Properties and Color rendering Index of Light Source

显色性是照明光源指标之一。现下 ,我们评价显色性所用的“显色指数”是 CIE在 1 965年推荐的“测验色”法。本文从色度学及此法计算过程 ,指出此方法由于种种原因 ,它的精确度十分有限 ,应该是一数值范围表明一类显色质量 ,有关文献把 50左右以下分为“劣”、50左右到 75左右为“一般”、75左右以上为“优”。两光源的显色指数相差二、三个百分点说明不了哪个显色性较优。

Color rendering property is one of the parameters characterized for illmumination lights, however, the rendering index, is currently used for evaluation of color-rendering properties, which was recommended for test color by CIE in 1965. According to the colormetry and process of calculation with this measurement, it is pointed out that the precision and accuracy of correlation of rendering property and rendering index were limited. The rendering quality should be catalogued by a certain range of values. The rendering index was divided 3 groups in some references that catalogue it with <50, 50-75 and >75 as inferior, general and superior, respectively. The differences of rendering index of two lights more than 2-3% can not be used for judgement on which one is better with rendering property.