A photon-counting imaging detector with wedge-and-strip anode (WSA) can record position information on single photon or particle of incidence

and can acquire objective’s two-dimensional image. They have been widely applied in fields such as biochemistry science

space science

analytical instrumentation

and so on. In this paper

we give a detail description on a detector prototype built by us firstly

including its configuration and operating principle; then imaging distortion of such detector is analyzed

correction methods are proposed and distortion-free images are obtained. After that

the resolution tests are taken using the USAF1951 resolution target which is placed in front of the detector. The acquired image shows that the element 6th in group 2nd of USAF1951 target can be differentiate by human’s naked eyes. At last

in order to remove the subjectivity error produced by human eyes observation and ensure the measurement accuracy

the imaging modulation value is computed. The computed results is that

for the element 6th in group 2nd of USAF1951

its imaging modulation can reached 57% and 37% in vertical and horizontal respectively. This result indicated that

our detector prototype can differentiate the element 6th in group 2nd absolutely

this corresponds to 7.13linepair/mm

i.e.

the spatial resolution can arrive at 0.14mm.