按照掺钛宝石激光器宽调谐的特性，提出了一种关于双折射滤光片的新设计方法，并得出了BF中光轴倾角的优化公式。据此设计的双折射滤光片已经用于实验，完全符合掺钛宝石激光器的调谐要求。

A new design for a birefringent filter is described, which is suitable for Ti:sapphire farers and other tunable broadband solid-stste lasers. The formulas to optimize the angle between the optic axis and the BF surface are given. A new BF designed according to this theory has been used in laboratory and its tuning characteristics are confirmed by the experimental measurement.