反射型扩束器由于其独特的优点得到了广泛的应用,但系统存在的中心遮拦现象,使得高斯光束在扩束过程中有40%左右的能量损失.本文提出了一种采用两个不同锥体反射镜构成的激光扩束新方案,消除了这种由于中心遮拦而带来的能量损失,并分析了对这种结构形式进行变化后得到的其他几种方案.

Reflecting beam expander has been used widely because of its special advantages. But the existing central shade makes an energy loss about 40% of the total energy during the process of expanding. A new method of beam expander, which using two different cone reflecting mirrors, is pointed out in this paper. And this method can be used to remove the energy loss introduced by the central shade. Other methods, based on the principles of this one have been analyzed too.