Fig. 3: The size and shape of the isoplanatic patch:.
From: Memory effect assisted imaging through multimode optical fibres
a–f Simulated maps of the power-ratio of points focussed to different regions of the distal facet through non-ideal fibres with quasi-diagonal TM D. The scale-bar indicates the power-ratio across the distal facet. Higher values of the power-ratio indicate regions on the distal fibre facet where spot scanning can be achieved with greater contrast, leading to higher fidelity imaging. We see that the isoplanatic patch gradually shrinks around the location of the guide-star (marked by a red circle). Foci are created using ATM \({\bf{D}}^{\prime}\) calculated from ugs using Eq. (7). pd, the power on the diagonal of D, decreases from (a) to (f) and is given at bottom of each panel. g–l Simulations of scanning imaging capabilities in each case. The scale-bar indicates the relative intensity of the reconstructed images.
