Wollaston棱镜分束角的光谱特性

提要:为了了解Wollaston棱镜分束角随入射光波长的变化规律,我们对其分束角的光谱特性从理论上进行了分析,并进行了实验测试,结果表明:入射光波长对Wollaston棱镜的分束角有一定的影响,其规律为:棱镜的结构角越大,入射光波长对分束角的影响越大:紫外光谱区的影响大于可见和红外光谱区。对于Wollaston棱镜分束角的对称性,其特点为:棱镜结构角越大,入射光波长越短,对称性越差。

The spectral properties of the splitting angle for wollaston prism

The splitting angle of Wollaston prism changes with the length of the incident light.In order to obtain the changing rule, we analyzed the spectral properties of the splitting angle for Wollaston prism theoretically and measured by experiments. The result indicated that the length of the incident light influences the splitting angle to a degree. The rule is that the degree of influence increases with the splitting angle and the degree of influence in UV-light region is greater than in visible and infra-red region.The symmetrical characteristic of the splitting angle is that the bigger the structure angle is and the shorter the incident wave length is, the poorer the symmetrical characteristic is.