beam guide

例句：

1. 1.The beam guide is used to direct the laser beam accurately.
   光束导向器用于准确地引导激光束。
2. 2. The beam guide is essential for maintaining the precision of the laser system.
   光束导向器对于保持激光系统的精度至关重要。
3. 3.The beam guide is designed to minimize the risk of damage to the optical components.
   光束导向器被设计成最小化对光学组件的损害风险。