Aidukas, T., Loetgering, L. and Harvey, A. R. (2022) Addressing phase-curvature in Fourier ptychography. Optics Express, 30(13), pp. 22421-22434. (doi: 10.1364/OE.458657) (PMID:36224940)
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Abstract
In Fourier ptychography, multiple low resolution images are captured and subsequently combined computationally into a high-resolution, large-field of view micrograph. A theoretical image-formation model based on the assumption of plane-wave illumination from various directions is commonly used, to stitch together the captured information into a high synthetic aperture. The underlying far-field (Fraunhofer) diffraction assumption connects the source, sample, and pupil planes by Fourier transforms. While computationally simple, this assumption neglects phase-curvature due to non-planar illumination from point sources as well as phase-curvature from finite-conjugate microscopes (e.g., using a single-lens for image-formation). We describe a simple, efficient, and accurate extension of Fourier ptychography by embedding the effect of phase-curvature into the underlying forward model. With the improved forward model proposed here, quantitative phase reconstruction is possible even for wide fields-of-views and without the need of image segmentation. Lastly, the proposed method is computationally efficient, requiring only two multiplications: prior and following the reconstruction.
Item Type: | Articles |
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Additional Information: | Funding: Engineering and Physical Sciences Research Council (EP/L016753/1). |
Status: | Published |
Refereed: | Yes |
Glasgow Author(s) Enlighten ID: | Aidukas, Dr Tomas and Harvey, Professor Andy |
Authors: | Aidukas, T., Loetgering, L., and Harvey, A. R. |
College/School: | College of Science and Engineering > School of Physics and Astronomy |
Journal Name: | Optics Express |
Publisher: | Optical Society of America |
ISSN: | 1094-4087 |
ISSN (Online): | 1094-4087 |
Published Online: | 06 June 2022 |
Copyright Holders: | Copyright © 2022 The Author(s) |
First Published: | First published in Optics Express 30(13): 22421-22434 |
Publisher Policy: | Reproduced under a Creative Commons licence |
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