1.形成明纹、暗纹的条件 I D D>>d 入 k=0,1,2,…明纹 =F2-r ±(2k+1)。k=0,1,2,…暗纹 ±(2k-1) 023-2 k=1,2, 2021/2/222021/2/22 7 1.形成明纹、暗纹的条件 d D 1 r 2 r 2 1  = r − r D d 1 = 2 =  k 2 (2 1)   k + k = 0,1,2,  明纹 k = 0,1,2,  暗纹 2 (2 1)   k − k = 1,2,   x 1 s 2 s 0 • p