Fig. 3.

Relative dispersion versus integration angle for simulations with NAs of 0.10, 0.22, and 0.50, ${\mu }_s^{\prime }d=0.1$ (a) Relative dispersion versus backward integration angle, for the optimal forward integration angles (16 deg, 23 deg, and 23 deg, respectively). (b) Relative dispersion versus forward integration angle, for the optimal backward integration angle (1 deg for all three NAs). The relative dispersion is much more sensitive to the forward integration angle than the backward integration angle and is slightly influenced by the NA.