两束部分偏振光的干涉场分析

Interference field analysis of two partially polarized lights

从波的叠加与干涉的基础理论出发,给出了当两束部分偏振光的一个光强极值方向平行时,其干涉场的光强分布和干涉条纹衬比度表达式.该表达式可应用于自然光、线偏振光和由二者组成的部分偏振光参与的干涉过程.在此基础上,对线偏振光与线偏振光、自然光与自然光、线偏振光与自然光等不同偏振态光叠加时的干涉场进行了具体分析,给出了其相应干涉场的光强分布及其干涉条纹衬比度的具体表达式,得到的结果对识别前述各种偏振态光形成的干涉场以及提高干涉仪中相应干涉场的干涉条纹衬比度具有重要意义.

Based on the superposition and interference theory of waves, when an extreme value of light intensity is parallel, the related formulas of the intensity distribution of interference field and the contrast degree of the interference fringe by two partially polarized lights are obtained. The formulas can be applied to various interference processes in which natural light, linear polarized light and partial polarized light composed of them participate. On the basis of these, the interference field of different polarization state light such as line polarized light and line polarized light, natural light and natural light, line polarized light and natural light are analyzed in detail. The specific expressions of light intensity distribution of interference field and contrast degree of the interference fringes are given. The conclusions are of great significance to recognition of interference field of the aforementioned polarization states and to improvement of the contrast degree of interference fringes of the corresponding interference field in the interferometer.