Journal Article ptychography Fresnel zone plate stacking MATLAB PtychoShelves Published Erratum Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S. SAXS Validation Study X-ray ptychography X-ray wavefield modeling angular spectrum method arthopods biophotonic structures coherent diffraction diffraction-limited synchrotron sources diffractive X-ray optics environmental control high-performance computing imaging in situ nano-tomography laminography light scattering nano 3D imaging nanostructure orientations nanotomography phase retrieval ptychographic tomography scanning microscopy