Fig. 1: Experimental setup for 3D DFXM with structured illumination.
From: Dark-field X-ray microscopy with structured illumination for three-dimensional imaging
A focusing lens directs the X-ray beam onto a selected crystalline grain or domain, while a 2D pixel-array detector captures its magnified image at the Bragg angle (2θ) via an objective lens. A scanning-coded aperture with an absorbing micro-pattern modulates the illumination for data collection from a fixed sample, enabling digital reconstruction of the grain’s 3D structure. The cross-section of the sample is magnified to illustrate how a diffracted signal in a detector pixel responds to the internal diffraction (green boxcars) of a specific grain dictated by the selectively illuminated regions.
