Figure 1

(a) Principle of the proposed hierarchical guidance. (b) KB-mirror-based magnified projection microscopy with zoom capability, combined with a laminographic scan geometry with tilt angle \(\theta\). (c) Illustration of location and size of the high-resolution ROI, as shown in (d), within the macroscopic sample investigated in situ during loading under application-relevant boundary conditions. (d) Workflow of hierarchical guidance introduced in (a) applied for the in situ study of nanoscale processes within the sample of (c) during ductile fracture. Only after on-the-fly phase-retrieval and subsequent 3D laminographic reconstruction the identification and tracking of relevant void clusters (red rectangle) is possible, e.g for ROI identification and adjustment during the measurement. Before, in the corresponding regions of the raw and phase retrieved projection images (marked in green), the ROI features are indiscernible due to Fresnel diffraction and strong superposition of the faint contrasts associated. For visualisation purposes, here the contrast of the zoomed phase map has been enhanced by high-pass filtering.