【摘要】 根据菲涅耳公式和光在晶体中的传播特性,分析了入射或反射椭圆偏振光长、短轴分量与s、p分量的关系以及晶体中的折射率与光轴方向的关系.在此基础上得到了测定单轴晶体折射率的一种行之有效的简单方法.通过测量椭圆偏振光的长、短轴分量并利用布儒斯特角的特点,就能完全确定单轴晶体的两个主折射率和光轴方向.实验证明这种方法是可行的,且测量精度比较高.更多还原

【Abstract】 By analyzing the common methods of measuring refractive index in a crystal,the authors of this paper try to get an easier and more effective way of acquiring refractive index of uniaxial crystal.Based on the Fresnel formula and the propagating characteristics of light in a uniaxial crystal,the relationship between s and p components with the long and short axes of the elliptically polarized light is analyzed in detail when an elliptically polarized light is incident on the sample surface of crystal.Also,the relationship between refractive index and the direction of optical axis is determined.Combining measurements of long and short axes of the incident and reflected elliptically polarized light with the nature of Brewster angle,the two principal refractive indices and the optical axis in a uniaxial crystal with buried optical axis are completely obtained.Experiment results confirm the accuracy and correctness of the method.更多还原