http://img1.ph.126.net/aPcWpy7aUtQ1NT1j6ybkpw==/6619349170770070093.gif
http://img1.ph.126.net/7yKa3uNEbu1m21Ior739oQ==/3362781546862240816.gif
菲涅尔圆孔衍射时,场点到极点的距离减小时,所划分出的半周期带的数目减少
http://img0.ph.126.net/F8S7XItqYYcc9zBrxTZ5Tw==/1106196658490381637.gif
http://img0.ph.126.net/nbtUVRl6TVDgov2azbKG0Q==/2891873910742666236.gif