diffraction grating spectral order

例句：

1. 1.The diffraction grating is used in the measurement of light intensity.
   衍射光栅用于测量光强度。
2. 2. The spectral order of the diffraction grating is crucial for the accuracy of the measurement.
   衍射光栅的光谱序对于测量的准确性至关重要。
3. 3.The diffraction grating is a key component in the construction of optical instruments.
   衍射光栅是光学仪器构建的关键部件。