双Wollaston棱镜光强分束比研究

利用折射定律和菲涅耳公式，研究了双Wollaston棱镜的光强分束比随入射光波长、棱镜结构角以及入射角等参量的变化关系，并进行了实验验证.结果表明：光强分束比随入射光波长的增大呈线性递减趋势；棱镜的结构角越小，光强分束比也越接近1；入射角对光强分束比的影响基本呈二次曲线型变化；当光正入射时，光强分束比最接近于1.给出了理论曲线和实验值的对比.

Splitting Intensity Ratio of Three-Element Wollaston Prism

The relationship of splitting intensity ratio of the three-element Wollaston prism and incident wavelengh,cutting angle and incident angle is studied using refraction law and Fresnel formula,and proved by experiment.The result indicates that the splitting intensity ratio linearly decrease with the incident wavelength augment,and the smaller the cutting angle is,the closer to 1.0 the splitting intensity ratio is.The effect of the incident angle to the splitting intensity ratio is basically a conic type,when the light is normally incidenced,the splitting intensity ratio furthest approach 1.0.The comparision of academic curve with experimental value is given,and it is beneficial to practical application of the three-element Wollaston prism.