Fig. 3.

(A) Examples of experimental intensity measurement for the sample orientation $\left({\theta }_x=-10^{○},{\theta }_y=0^{○}\right)$. (B) Phase approximant for IC layer 1 obtained from the collection of 22 intensity patterns at different orientations $\left({\theta }_x=-10^{○},-8^{○},\dots ,+10^{○},{\theta }_y=0^{○}\right)$ and $\left({\theta }_x=0^{○},{\theta }_y=-10^{○},-8^{○},\dots ,+10^{○}\right)$.