Addressing phase-curvature in Fourier ptychography

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)

[img] Text
271368.pdf - Published Version
Available under License Creative Commons Attribution.

15MB

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
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

University Staff: Request a correction | Enlighten Editors: Update this record

Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
190828EPSRC Centre for Doctoral Training in Sensing and MeasurementAndrew HarveyEngineering and Physical Sciences Research Council (EPSRC)EP/L016753/1P&S - Physics & Astronomy