Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439, USA.
Opt Lett. 2011 Jun 15;36(12):2227-9. doi: 10.1364/OL.36.002227.
We present the framework for convergent beam Bragg ptychography, and, using simulations, we demonstrate that nanocrystals can be ptychographically reconstructed from highly convergent x-ray Bragg diffraction. The ptychographic iterative engine is extended to three dimensions and shown to successfully reconstruct a simulated nanocrystal using overlapping raster scans with a defocused curved beam, the diameter of which matches the crystal size. This object reconstruction strategy can serve as the basis for coherent diffraction imaging experiments at coherent scanning nanoprobe x-ray sources.
我们提出了会聚束布拉格叠光术的框架，并通过模拟证明，纳米晶体可以从高度会聚的 X 射线布拉格衍射中进行叠光术重建。叠光术迭代引擎扩展到三维，并成功使用具有离焦弯曲光束的重叠光栅扫描来重建模拟纳米晶体，该光束的直径与晶体尺寸匹配。这种物体重建策略可以作为相干扫描纳米探针 X 射线源相干衍射成像实验的基础。
