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Proceedings Paper

New phase retrieval method for single-shot x-ray Talbot imaging using windowed Fourier transform
Author(s): Kentaro Nagai; Hidenosuke Itoh; Genta Sato; Takashi Nakamura; Kimiaki Yamaguchi; Takeshi Kondoh; Soichiro Handa; Toru Den
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Paper Abstract

We propose a new phase retrieval technique using a windowed Fourier transform (WFT) method for fringe pattern analysis to obtain a high-resolution phase map. The WFT method has been studied to improve the noise robustness of FT methods. In our proposed technique, an extra step is added to isolate the WFT spectrum containing phase information from other spectra, which is effective when a narrow window function is used for the high-resolution phase map. We demonstrate phase retrieval along both x- and y-axes from a two-dimensional fringe pattern obtained by X-ray Talbot imaging. Differential phase maps in high resolution with effective noise reduction are retrieved by the proposed method.

Paper Details

Date Published: 10 September 2011
PDF: 8 pages
Proc. SPIE 8127, Optical Modeling and Performance Predictions V, 812706 (10 September 2011); doi: 10.1117/12.893281
Show Author Affiliations
Kentaro Nagai, Canon Inc. (Japan)
Hidenosuke Itoh, Canon Inc. (Japan)
Genta Sato, Canon Inc. (Japan)
Takashi Nakamura, Canon Inc. (Japan)
Kimiaki Yamaguchi, Canon Inc. (Japan)
Takeshi Kondoh, Canon Inc. (Japan)
Soichiro Handa, Canon Inc. (Japan)
Toru Den, Canon Inc. (Japan)


Published in SPIE Proceedings Vol. 8127:
Optical Modeling and Performance Predictions V
Mark A. Kahan, Editor(s)

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