单轴晶体双折射滤光片特性研究

Study of characteristics of a tilted uniaxial birefringent filter

本文研究了由单轴双折射晶体波片(光轴平行波片表面)和理想线偏振片组成的双折射滤光片倾斜放置时的透过率、群延迟和二阶、三阶色散特性。推导出了双折射滤光片的透过率、群延迟表达式,给出了透过率、群延迟和二阶色散随光线入射角和光轴旋转角变化的等高线图,并对透过率的等高线图作了实验验证,取得了很好的一致性。群延迟和二阶色散的等高线图对双折射滤光片的优化设计和实际应用具有理论指导意义。

We present investigations of transmissivity, group delay, the second - and third - order dispersion of a tilted birefringent filter （TBF）, which ineludes a tilted uniaxial birefringent plate sandwiched between two linear polarizers. The analytical expressions for transmissivity and group delay of the birefringent filter are derived. In particular, the contour traces of transmissivity, group delay and group delay dispersion versus the incidence angle and the rotation angle are also shown. The contour of transmissivity is in good agreement with experiment results.