Speaker
Description
Ptychography is a scanning coherent diffraction imaging technique that takes far-field diffraction patterns measured at well-known, predefined scan points and reconstructs the two-dimensional complex X-ray transmission function. This technique has been used to image a wide range of technologically important samples, ranging from micrometeorites to x-ray optics, with reported spatial resolutions as high as 17 nm. Ptychography depends on three main components: coherent X-ray sources, efficient phase retrieval algorithms, and precise nano-positioning of samples. An investigation into the impact of nano-positioning errors on ptychographic reconstructions has not been conducted. We will systematically examine the effects of these errors in two distinct scenarios: (1) when the predefined scan points are hit accurately, but the recorded positions are erroneous, and (2) when the predefined scan points are missed, but the actual scan point positions are accurately known. With the analysis of these two cases, we intend to enhance the understanding of how ptychographic reconstructions are affected by positioning errors.
| Keyword-1 | Ptychography |
|---|---|
| Keyword-2 | Simulations |
| Keyword-3 | Positioning Errors |