【摘要】 分析了冰洲石/氟化钡紫外外偏光镜在正向使用时透射光束的偏离角及影响因素;指出了该种偏光镜反向使用时等效于罗匈棱镜,并计算了分束角的大小;对这两个特性进行了测试。结果表明:其反向使用时的分束角在265nm—768nm波段内为8°左右,随波长的起伏在9 679°—7 138°之间。反向使用时可以作为性能优良的紫外偏光分束镜,且反向使用时的消光比要优于正向使用时的消光比。更多还原

【Abstract】 The distortion of transmitted beam and the factor that affect the distortion are analysed when the beam incident forward. When the prism is used inversely, it is equal to Rochon prism. Equations are given for the deviation angle and the splitting angle. The two character are tested. The result proved that the splitting angle is about 8° and ranges from 9.679° to 7.138° with the wavelength from 265nm to 768nm. It can be used as excellent ultraviolet polarizing splitting prism, and its extinction ratio is excellent when used in the reverse.更多还原