均匀色空间中绿色翡翠的色差

Color difference of green jadeite jade in even color space

采用MPV_Ⅲ型显微光度计测定了 32个翡翠样品的可见光吸收光谱 ,计算了部分样品的三刺激值。在此基础上引入色度学中均匀色空间及色差的概念 ,通过计算样品NBS值定量分析了不同翡翠样品间的绿色差异。结果表明 ,色差的定量计算可以反映样品间的真实颜色差别 ,并且不同于同色异谱指数 ,可作为绿色翡翠颜色鉴别中一种较为有效的定量方法。

The visible absorption spectrograms of 32 jadeite jade samples were measured by MPV-Ⅲ microphotometer, and their three-impulse values were calculated. On such a basis, the concept of color difference in even color space is put forward. By calculating NBS values of the samples, the color differences of the samples were analyzed quantitatively. It is shown that the quantitative calculations of color differences can present true colors of different samples and are different from the metamerism indexes. Therefore, this technique is a valuable means for identification of green jadeite jade and can play a very important role in gem identification.