Institute for Solid State Physics, Graz University of Technology, Graz, Austria.
Appl Spectrosc. 2010 Jun;64(6):669-81. doi: 10.1366/000370210791414452.
A method for Kramers-Kronig transformation of the reflectance ratio of s- and p-polarized light is discussed. The method is well suited for the determination of the optical constants of isotropic samples such as pellets prepared from powders. An algorithm is given that performs the transformation, including extrapolation at the data margins and an automated data fitting routine, that can handle very complex spectra of, e.g., biomacromolecules such as cellulose to obtain noise free spectra. Criteria for evaluation of the quality of the obtained data are given, and experimental data for cellulose II and xylane are presented.
讨论了 s 和 p 偏振光反射率的克喇末-克龙尼克变换方法。该方法非常适合各向同性样品（例如粉末压制成的颗粒）的光学常数的确定。文中给出了执行变换的算法，包括在数据边缘进行外推和自动数据拟合例程，该例程可以处理非常复杂的光谱，例如纤维素等生物大分子，以获得无噪声的光谱。给出了评估所获得数据质量的标准，并展示了纤维素 II 和木聚糖的实验数据。
