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Synthetic Incoherence Via Scanned Gaussian Beams



Zachary H. Levine


Tomography, in most formulations, requires an incoherent signal. For a conventional transmission electron microscope, the coherence of the beam often results in diffraction effects which limit the utility of a tilt series with conventional tomographic reconstruction algorithms. In this paper, an analytic solution is given to a scanned Gaussian beam which reduces the beam coherence to be effectively incoherent for medium-size (of order 100 voxels thick) tomographic applications. The scanned Gaussian beam leads to more incoherence than hollow-cone rotating beam illumination.
Journal of Research (NIST JRES) -
111 No. 6


electron microscopy, Gaussian beams, incoherence, synthetic incoherence


Levine, Z. (2006), Synthetic Incoherence Via Scanned Gaussian Beams, Journal of Research (NIST JRES), National Institute of Standards and Technology, Gaithersburg, MD (Accessed June 13, 2024)


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Created December 1, 2006, Updated February 17, 2017