.
, , , 21 22, . (). w2w1, 21
j2 j1, , (. 2.6).
w1 w2 : w1/w2 = n 1/ n 2. , , .
:
x = A 1sinw t;
(2.10)
y = A 2sin2w t.
t. x (t) y (t). . XY. , (Dj = 0), (. . 2.7, ). Dj = p/2 (. . 2.7, ). , 0 p/2, , .
, . , :
wy/wx = n x/ n y. (2.11)
nx ny X Y ( ).
(2.11). t , . , t Tx Ty, X Y. r X . , t nx = 2t/ Ty. , ny = 2t/Tx. , ny / nx = Ty / Tx = wx/wy.
, , . .