reference grating

例句：

1. 1.The engineer used a reference grating to align the beams of light.
   工程师使用一个参考栅格来对光束进行对准。
2. 2.The scientist conducted experiments using a reference grating to measure the wavelength of light.
   科学家使用一个参考栅格来测量光的波长。
3. 3.The camera's lens was adjusted to match the reference grating for better focus.
   相机的镜头被调整到与参考栅格相匹配，以便获得更好的聚焦效果。