  X-ray ptychography utilizes overlapping illuminations to reconstruct the
object's phase and absorption signal with spatial resolutions much smaller than
the focus size. Usually, the illumination overlap is chosen to be between 50%
and 60% in order to ensure high quality reconstructions at reasonable scan
times and/or doses. Here, we experimentally demonstrate that ptychographic
iteration with object instead of flat initialization allows for a significant
reduction of the overlap with only a modest loss in reconstruction quality.
This approach could prove beneficial for dose sensitive experiments and for
rapid feedback overview scans.
