Figure 2: Phantom simulations.
From: Single-shot tomographic movies of evolving light-velocity objects
(a) 2D snapshots (xob versus 
) of evolving ‘phantom’ object at seven selected times tob after entering a medium (that is, seven locations zob=vobtob along its propagation path) as it propagates with velocity vob=0.68c. The longitudinal axis of each snapshot indicates local distance 
from the centre of the object, with the object’s leading edge to the right. Remaining rows show tomographic reconstructions of the phantom object for three probe configurations: (b) Nineteen probes at projection angles −90°<φ<90° with 10° separation, vpr=0.70c (configuration I); (c) 18 probes at −90°<φ<80° with 10° separation, vpr=0.681c (configuration II); (d) 5 probes at −70°<φ<70° with 35° separation, vpr=0.66c (configuration III). The colour bar shows the dimensionless refractive index change of original and reconstructed objects.
