McNally, J.G.; Rehbein, S.; Pratsch, C.; Werner, S.; Guttmann, P.; Schneider, G.: 3D PSF Measurement for a Soft X-ray Microscope and Comparison to Theory. In: Computational Optical Sensing and Imaging in Proceedings Imaging and Applied Optics 2016, 25–28 July 2016, Heidelberg, Germany. OSA, 2016, p. CM3D.4
10.1364/COSI.2016.CM3D.4
Open Accesn Version

Abstract:
The transmission X-ray microscope’s 3D PSF exhibits an axial asymmetry that cannot be explained by an incoherent imaging model for either a lens or zone plate, with or without spherical aberration.