  X-ray ptychography has revolutionised nanoscale phase contrast imaging at
large-scale synchrotron sources in recent years. We present here the first
successful demonstration of the technique in a small-scale laboratory setting.
We conducted an experiment with a liquid metal-jet X-ray source and a single
photon-counting detector with a high spectral resolution. The experiment used a
spot size of 5 microns to produce a ptychographic phase image of a Siemens star
test pattern with a sub-micron spatial resolution. The result and methodology
presented show how high-resolution phase contrast imaging can now be performed
at small-scale laboratory sources worldwide.
