Thursday, August 26, 2010, 1:30 pm — Large Conference Room, Bldg. 703
When coherent diffraction patterns are measured from overlapping regions in an extended sample it is possible to reconstruct not only the optical transmission function of the sample, but also the full complex-valued wavefield that was incident upon it. In this talk I will discuss the methods, related to ptychography, that we have used to reconstruct a hard X-ray beam waist created by nanofocusing K-B mirrors. Beyond characterizing the focus, the reconstructions provide us with a quantitative map of the aberrations in the mirror surface, and allow us to calculate corrections for astigmatism and misalignment. Ptychography provides an answer to the question "could the mirrors be re-aligned to produce a better focus?", even when the performance is close to the diffraction limit.
Hosted by: Ray Conley
6686 | INT/EXT | Events Calendar
Not all computers/devices will add this event to your calendar automatically.
A calendar event file named "calendar.ics" will be placed in your downloads location. Depending on how your device/computer is configured, you may have to locate this file and double click on it to add the event to your calendar.
Event dates, times, and locations are subject to change. Event details will not be updated automatically once you add this event to your own calendar. Check the Lab's Events Calendar to ensure that you have the latest event information.