beam attenuator

例句：

1. 1.The beam attenuator is used to adjust the intensity of the light beams.
   光束衰减器用于调整光束的强度。
2. 2. The beam attenuator is crucial for maintaining the quality of the image.
   光束衰减器对于保持图像质量至关重要。
3. 3.The beam attenuator was designed to reduce the amount of light that reaches the camera lens.
   光束衰减器被设计用来减少到达相机镜头的光量。