分别用矢量图解法和积分法导出了菲涅耳圆孔衍射中心场点的光强的解析表示，方便了此类问题的分析。
An analytic expression for the intensity of the central point in Fresnel's circular aperture diffraction was derived using the methods of vector map and integration respectively.
并首次对菲涅耳圆孔衍射问题给出了精确的定量描述，其结果与波动光学定性讨论规律相符，又与实验所得衍射花样一致。
As its typical application, the exact result of Fresnel circular diffraction is obtained. The result agrees with the qualitative analysis in wave optics and the experiment pattern of the diffraction.
实验中发现，经常使用的大孔径会聚光束的圆孔和圆屏衍射图样不同于一般的菲涅耳圆孔和圆屏衍射图样。
It is discorered that circular hole diffraction and circular disk diffraction pattern in large aperture convergent beam are different from those of general Fresnel diffraction.
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