Semi-transparent central stop in high-resolution X-ray ptychography using Kirkpatrick-Baez focusing

A semi-transparent central stop has been used for ptychographic coherent diffractive imaging to increase the effective dynamic range in the recording of the far-field diffraction patterns. In this way, the high flux density provided by nano-focusing Kirkpatrick-Baez mirrors can be fully exploited for high resolution and quantitative phase reconstructions.