针对所设计的棱镜Q 开关，首次把棱镜的折射率考虑在内，将折射率对棱镜转镜Q 开关光学加速作用的影响进行了详细的推导计算与分析。计算结果表明：考虑折射率影响后，相对于平面镜而言，棱镜旋转速度会等效减小，说明折射率低的棱镜比折射率高的棱镜具有更明显的光学加速作用，即棱镜折射率对光学加速作用有一定负作用。因此，在选择光学加速装置时，除了要从反射损失小、易于加工等角度考虑外，还需将棱镜折射率因素考虑在内，以期获得最佳光学加速作用。

Aiming at the designed spinning prism Q-switch, the refractive index of the prism was considered for the first time in the optical acceleration, and the influence of the index of the prism was calculated in detail based on the theory of fourfold optical acceleration. The calculated results show that compared with the flat mirror, the rotating speed of the prism will “diminish” when the refractive index is considered, which means that the smaller refractive index of the prism have better optical acceleration. In one word, the refractive index of the prism has negative influence on the optical acceleration. Therefore, in the design of the optical acceleration device, the refractive index of the prism should be considered carefully in order to obtain the best optical acceleration.