摘要
本文主要分析缝宽不等且成周期性变化的光栅的衍射,给出其定量的光强分布规律,类比等缝宽光栅的衍射,引入"光栅的一个周期的衍射因子"与"光栅的周期间的干涉因子"的概念描述缝宽周期性变化的光栅的衍射光强分布.进一步,由Matlab仿真模拟了缝宽周期性变化的光栅的衍射相对光强分布曲线图,并定性讨论了光栅的相邻缝的间距d、缝宽、缝的数量等参数对光强分布的影响,从而更加形象、准确、多方位地分析变缝宽光栅的衍射规律.
The regular pattern of the grating diffraction with unequal and cyclic slid width has been analyzed, and the corresponding quantitative description of its light intensity distribution has been obtained. By comparing with equal-slid-width grating, the diffraction factor within a cycle and interference factor among cycles are applied to describe the light intensity distribution of the varied-slid-width grating. Such a light intensity distribution has further been simulated by Matlab and the influence of each parameter has been discussed to get a more accurate demonstration of the light intensity distribution of the varied-slid-width grating.
引文
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