光栅衍射和布拉格公式

The grating diffraction and Bragg equation

在斜入射光栅衍射中,第k级明纹的衍射角θk随入射角α变化,衍射光偏离入射光的角度φ=f(α),此函数有极小值点,并且此时θk和光栅常数的关系与布拉格公式形式相同.

The incident optical wave arrives the grating at the incident angle α, and the diffraction angle θk of the class k changes with α. The angle between the incident ray and diffraction ray： φ = f（α ）, this function has a minimum. At this time θk and ameet the Bragg law.