Fig. 5. Look-up tables for RI and thickness reconstruction.

a, b Look-up tables $L\left(z_{\mathrm{S}},{\tau }_{\mathrm{R}}\right)$ for retrieving RI $\left(n\right)$ and thickness ($d)$, respectively, of layered structures. The blank region in both figures corresponds to $n>1.7$. We assume NA = 1, center wavelength ${\lambda }_c=800\mathrm{nm}$, and spectral bandwidth $\mathrm{\Delta }\lambda =40\mathrm{nm}$