Numerical model for tomographic image formation in transmission x-ray microscopy
2011 (English)In: Optics Express, ISSN 1094-4087, Vol. 19, no 12, 11578-11583 p.Article in journal (Refereed) Published
We present a numerical image-formation model for investigating the influence of partial coherence, sample thickness and depth-of-focus on the accuracy of tomographic reconstructions in transmission x-ray microscopes. The model combines wave propagation through the object by finite difference techniques with Fourier methods. We include a ray-tracing model to analyse the origin of detrimental stray light in zone plate-based x-ray microscopes. These models allow optimization of x-ray microscopy systems for quantitative tomographic imaging of thick objects. Results show that both the depth-of-focus and the reconstructed local absorption coefficient are highly dependent on the degree of coherence of the optical system.
Place, publisher, year, edition, pages
2011. Vol. 19, no 12, 11578-11583 p.
Atom and Molecular Physics and Optics
IdentifiersURN: urn:nbn:se:kth:diva-37275DOI: 10.1364/OE.19.011578ISI: 000292865500060ScopusID: 2-s2.0-79958206915OAI: oai:DiVA.org:kth-37275DiVA: diva2:433124
FunderSwedish Research Council
QC 201108092011-08-092011-08-082011-08-09Bibliographically approved