纯金属颜色的定量计算

Color calculation of pure metals

以Au ,Ag ,Cu ,Pt ,Al,Zn ,Mn和Ti8种纯金属为研究对象 ,采用CIELAB均匀色空间中的明度指数L 和色品指数a ,b 定量描述金属的颜色 ;运用固体物理学和色度学的基本理论 ,研究了纯金属颜色的物理计算方法、可见光区域光学常数 ,计算了纯金属的色度指数。金属颜色的计算结果和测量结果的对比表明 ,采用物理方法计算金属的色品 ,避免了由于样品制备和颜色测量等因素带来的种种误差。给出了 8种纯金属颜色间的细微差别 ,并就金属颜色的起因进行了初步探讨。

Using CIE LAB color system, the metal color was described by lightness index L~* and chromatic indexes such as a~* and b~*. The theories of solid physics and chromatics were introduced into the color calculation of chromaticity. Based on the optical constants, the reflectivity and color of eight pure metals such as Au, Ag, Cu, Pt, Al, Zn, Mn, and Ti were computed theoretically. Then, the calculated colors were compared with the measured ones. The results show that the calculated chromatic indexes are convincible because the physical calculation can avoid the errors from the color measurement and the sample condition such as roughness and oxidation. The color differences of eight metals and the origin of the metal color were also illustrated.