Querry M R, Osborne G, Lies K, Jordon R, Coveney R M
Appl Opt. 1978 Feb 1;17(3):353-6. doi: 10.1364/AO.17.000353.
Near normal-incidence relative spectular reflectance was measured throughout the 0.2-32.8-microm wavelength region for three cut and polished samples of Bethany Falls limestone. Water, for which the complex refractive index is well known, was the reflectance standard. Although the visual appearances of the three samples were quite different, the relative reflectance spectra for the three samples were nearly identical. The three relative reflectance spectra were averaged to obtain a composite relative reflectance spectrum. Kramers-Kronig analysis of the composite relative reflectance spectrum then provided spectral values of the complex refractive index for limestone. A classical Lorentz dispersion analysis was also made of the composite relative reflectance spectrum, and the resulting dispersion parameters were tabulated. Infrared bands characteristic of the carbonate ion CO(3)(-2) of the calcite comprising the limestone appeared as strong features in the spectra.
在0.2 - 32.8微米波长范围内，对贝瑟尼瀑布石灰岩的三个切割和抛光样品测量了近垂直入射相对镜面反射率。复折射率已知的水作为反射率标准。尽管这三个样品的视觉外观有很大差异，但它们的相对反射率光谱几乎相同。将这三个相对反射率光谱进行平均，以获得一个复合相对反射率光谱。然后，通过对复合相对反射率光谱进行克喇末-克朗尼格分析，得到了石灰岩复折射率的光谱值。还对复合相对反射率光谱进行了经典的洛伦兹色散分析，并将所得色散参数制成表格。构成石灰岩的方解石中碳酸根离子CO(3)(-2)的红外波段在光谱中表现为强特征峰。
