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Proceedings Paper

Continuous-wave terahertz phase-contrast imaging
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Paper Abstract

We introduced two continuous-wave terahertz iterative phase-contrast imaging methods. In-line digital holography has the capability to reconstruct the amplitude and phase distributions simultaneously. It is a non-destructive, high-resolution, full-field dynamic phase-contrast imaging technique. Ptychography can reconstruct the complex amplitude distribution of the transmission object from the overlapped diffraction patterns. Both methods can achieve phase-contrast imaging, and are suitable for terahertz region. In this paper, both Gabor in-line holographic and ptychographical configurations are investigated from algorithms to experiments. For in-line holography, the use of extrapolation, synthetic aperture, sub-pixel shifting and multi-plane imaging are introduced to improve the resolution and reconstruction accuracy. For ptychography, we obtained the ptychographical reconstruction results of a polypropylene alphabet sample, which provides a new imaging method for terahertz phase-contrast imaging.

Paper Details

Date Published: 24 May 2018
PDF: 7 pages
Proc. SPIE 10677, Unconventional Optical Imaging, 106771X (24 May 2018); doi: 10.1117/12.2309947
Show Author Affiliations
Dayong Wang, Beijing Univ. of Technology (China)
Lu Rong, Beijing Univ. of Technology (China)
Changchao Zhai, Beijing Univ. of Technology (China)
Yunxin Wang, Beijing Univ. of Technology (China)
Jie Zhao, Beijing Univ. of Technology (China)
Jinxin Guo, Beijing Univ. of Technology (China)

Published in SPIE Proceedings Vol. 10677:
Unconventional Optical Imaging
Corinne Fournier; Marc P. Georges; Gabriel Popescu, Editor(s)

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