基于夫琅禾费衍射理论，推导了平行光入射变栅距光栅后衍射光强的角度分布。
On the basis of Fraunhofer diffraction theory, the diffraction patterns of a Varied Line-space (VLS) grating were obtained for incidence beam in parallel and uniform.
基于夫琅禾费衍射理论和巴比涅互补原理，提出了利用激光衍射对细丝直径进行动态测量的方法。
Based on the theory of Fraunhofer diffraction and Babinet principle, a method is proposed for dynamically measuring fine-wire diameter using laser diffraction.
结果显示，该方法思路清晰，结果准确可靠，可作为教学中分析夫琅禾费衍射现象的另一种有效方法。
The results of simulation analysis to single slit, aperture and multi-slits show that this method is a simple and credible way to analyze Fraunhofer diffraction in teaching.
结果显示，该方法思路清晰，结果准确可靠，可作为教学中分析夫琅禾费衍射现象的另一种有效方法。
The results of simulation analysis to single slit, aperture and multi-slits show that this method is a simple and credible way to analyze Fraunhofer diffraction in teaching.
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