光栅旋转对衍射角改变量及波长的影响

Influence of Grating Rotation on the Change of Diffraction Angle and Wavelength

理论分析了光栅在分光计的水平载物台上旋转一定角度后对衍射角改变量的影响,并通过Matlab软件作曲面图直观观察衍射角改变量随光栅旋转角度和衍射角增大的变化,将实验测量数据与理论推导进行了对比,发现光栅旋转一定角度后,计算波长所用衍射角的改变量随着衍射角的增大而增大,且会对光波波长的计算造成一定误差。

The influence of the grating on the spectrometer table which rotated a certain angle on the change of diffraction angle is analgzed theoretically,and through the Matlab software to make surface chart which can visually observe the change of diffraction angle as you increase the rotation angle and the diffraction angle.Compared the experimental measurements with theoretical derivation,found that the grating rotated a certain angle,the change of diffraction angle used in the calculation increases with the increase of the diffraction angle,and it will cause some errors in the calculation of wavelength.