Table 1.

u- and v-fringe shapes and corresponding coefficients of polynomial expressions.

Case	u-Fringes	v-Fringes	Coefficients	Remarks
(1)	L/V	L/H	$b_2=b_1=c_2=c_1=0$, $a_1\ne 0,d_1\ne 0$	Observed in Figure 3 point (a)
(2)	L/H	L/V	$b_2=a_1=c_2=d_1=0$, $b_1\ne 0,c_1\ne 0$	$v$-fringes shown in Figure 4b
(3)	L/S	L/S	$b_2=c_2=0$, $a_1\ne 0,b_1\ne 0,c_1\ne 0,d_1\ne 0$	Observed in Figure 3 point (b)
(4)	nL/V	L/H	$b_1=c_2=c_1=0$, $b_2\ne 0,a_1\ne 0,d_1\ne 0$	Observed in Figure 3 point (c)
(5)	nL/V	nL/H	$b_1=c_1=0$, $b_2\ne 0,c_2\ne 0,a_1\ne 0,d_1\ne 0$	Observed in Figure 3 point (d)
(6)	nL/S	nL/S	$b_2\ne 0,c_2\ne 0,a_1\ne 0,b_1\ne 0,c_1\ne 0,d_1\ne 0$	Observed in Figure 3 point (e)