Gregoriou Vasilis G, Tzavalas Spiros, Bollas Stavros T
Foundation for Research and Technology-Hellas, Institute of Chemical Engineering and High Temperature Processes (FORTH/ICE-HT), Patras, 26504 Greece.
Appl Spectrosc. 2004 Jun;58(6):655-61. doi: 10.1366/000370204873024.
Parameters such as the viewing angle and the extinction ratio (the ratio of the transmitted light over the total light intensity that reaches the sample) are very important in the design of novel optical devices such as new types of polarizers, liquid crystal displays, etc. The initial aim of this work was the comparison of experimentally obtained results to the currently accepted theoretical model that is based on Zbinden's theory of intensity ellipsoid. Due to observed discrepancies between the above theory and experimental data, a new mathematical model was generated in order to adequately explain the experimental results. This new theory allows the calculation of light absorbance at every combination of azimuthal and tilt angles in complete agreement with the experimentally determined values. In addition, in this paper we settle, once and for all, the confusion that exists in the spectroscopic literature with regard to the dependence of absorption and transmission values vis-à-vis the angle of incidence of the incoming light. We conclusively show that it is absorptance (alpha) and not absorption or absorbance (A) which shows a cos(2) dependence on the angle formed by the electric vector and the dipole.
诸如视角和消光比（透射光与到达样品的总光强之比）等参数在新型光学器件（如新型偏振器、液晶显示器等）的设计中非常重要。这项工作的最初目的是将实验获得的结果与基于津宾登强度椭球理论的当前公认理论模型进行比较。由于观察到上述理论与实验数据之间存在差异，因此生成了一个新的数学模型，以便充分解释实验结果。这个新理论允许计算在方位角和倾斜角的每一种组合下的光吸收率，这与实验确定的值完全一致。此外，在本文中，我们一劳永逸地解决了光谱学文献中存在的关于吸收和透射值相对于入射光入射角的依赖性的困惑。我们最终表明，是吸收率（α）而不是吸收或吸光度（A）对由电矢量和偶极子形成的角度呈现余弦平方依赖性。
