beam extractor

例句：

1. 1.The beam extractor is used to separate the light beams from the other colors.
   光束提取器用于将光光束与其他颜色分离。
2. 2.In this experiment, we need to use a beam extractor to adjust the intensity of the light beam.
   在这个实验中，我们需要使用光束提取器来调整光光束的强度。
3. 3. The beam extractor was designed to improve the accuracy of the measurement.
   光束提取器被设计用来提高测量的准确性。