玻璃表面反射线偏振光的光强规律实验研究

Intensity of linearly polarized light reflected from glass surface

当线偏振光从空气入射到玻璃表面时,其反射光仍为线偏振光,反射率与入射角i、入射线偏振光振动面的方位角α有关.本文分别从理论上和实验上研究了反射光强随入射角度i的变化规律,及入射光偏振态对反射光强的影响,实验结果与理论模拟吻合很好.此外,利用入射光只有p分量时的光强反射率与入射角i的关系曲线测定了样品玻璃的布儒斯特角及折射率.

The dependence of the intensity of linearly polarized light reflected from glass surface on the incidence angle and the orientation of the electrical field was investigated.When the incident light was linearly polarized,the light reflected from a uniform glass surface was also linearly polarized.The reflectivity depended on the incidence angle and the orientation of the electrical field,which was studied based on both Fresnel equations and polarization experiments.The theoretical analyses agreed well with the experimental results.In addition,Brewster angle and refractive index of sample glass were measured by the relationship between the reflectivity and the incidence angle when the incident light was p-polarized.