Depth-resolved Laue microdiffraction with coded-apertures

TL;DR

This paper presents a fast, depth-resolved Laue microdiffraction technique using coded-apertures and a reconstruction algorithm to image crystalline structures, strains, and orientations at micrometer resolution.

Contribution

It introduces a novel imaging method combining coded-aperture scanning with reconstruction algorithms for depth-resolved Laue diffraction analysis.

Findings

Successful experimental validation of the method.

Achieves sub-micrometer spatial resolution.

Provides rapid access to full diffraction data.

Abstract

We introduce a rapid data acquisition and reconstruction method to image the crystalline structure of materials and associated strain and orientations at micrometer resolution using Laue diffraction. Our method relies on scanning a coded-aperture across the diffracted x-ray beams from a broadband illumination, and a reconstruction algorithm to resolve Laue microdiffraction patterns as a function of depth along the incident illumination path. This method provides a rapid access to full diffraction information at sub-micrometer volume elements in bulk materials. Here we present the theory as well as the experimental validation of this imaging approach.