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Beam-divergence deconvolution for diffractive imaging

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Title: Beam-divergence deconvolution for diffractive imaging
Authors: Kawahara, Kota Browse this author
Gohara, Kazutoshi Browse this author
Maehara, Yosuke Browse this author
Dobashi, Takashi Browse this author
Kamimura, Osamu Browse this author
Keywords: electron diffraction and scattering methods
Phase retrieval (optics)
Issue Date: Feb-2010
Publisher: American Physical Society (APS)
Journal Title: Physical Review B
Volume: 81
Issue: 8
Start Page: 081404-1
End Page: 081404-4
Publisher DOI: 10.1103/PhysRevB.81.081404
Abstract: This Rapid Communication presents a method of beam-divergence deconvolution for diffractive imaging. First, the detected diffraction intensity is formulated as a convolution between the diffraction intensity of parallel incident beams and the divergence of an incident beam. It is shown numerically that the convolution causes the reconstructed image to shrink and become blurred. Next, the algorithm of deconvolution used in the iterative Fourier phase retrieval method is applied to the convoluted diffraction intensity deteriorated by quantum noise. Numerical simulations show that the proposed algorithm recovers the deconvoluted diffraction intensity and improves the reconstructed image. Finally, the algorithm is applied to an electron-beam experiment to reconstruct a multiwall carbon nanotube. The results verified that the algorithm reduces the influence of beam divergence.
Rights: © 2010 The American Physical Society
Type: article
URI: http://hdl.handle.net/2115/45429
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 郷原 一寿

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