Non-diffractive computational ghost imaging

Phillips, D.B., He, R., Chen, Q., Gibson, G.M. and Padgett, M.J. (2016) Non-diffractive computational ghost imaging. Optics Express, 24(13), pp. 14172-14182. (doi: 10.1364/OE.24.014172)

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Computational ghost imaging (CGI) enables an image to be recorded using a single-pixel detector. The image can be reconstructed from correlations between the scene and a series of known projected intensity patterns. In this work we investigate the performance of CGI using pseudo non-diffracting (ND) speckle patterns. We demonstrate an extended depth-of-field that is ∼ 2–3 times greater than that achievable with conventional speckle, when only computing each intensity pattern to a single depth. In addition, the average speckle grain size of ND speckle is reduced by a factor of ∼ 1.5 relative to conventional speckle, which enhances the lateral Rayleigh-limit resolving power of our reconstructed images. However, the point-spread function (PSF) of our imaging system takes the form of a Bessel beam, which manifests itself as long-range correlations between speckle grains in the projected patterns. We discuss the trade-off between enhancement of the depth-of-field and the lateral resolution when using ND speckle, at the expense of a reduction in image contrast. Our work demonstrates that the tailoring of lateral and axial correlations in projected intensity patterns permits PSF engineering in CGI.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Gibson, Dr Graham and Phillips, Dr David and Padgett, Professor Miles
Authors: Phillips, D.B., He, R., Chen, Q., Gibson, G.M., and Padgett, M.J.
College/School:College of Science and Engineering > School of Engineering
College of Science and Engineering > School of Physics and Astronomy
Journal Name:Optics Express
Publisher:Optical Society of America
ISSN (Online):1094-4087
Published Online:15 June 2016
Copyright Holders:Copyright © 2016 The Authors
First Published:First published in Optics Express 24(13):14172-14182
Publisher Policy:Reproduced under a Creative Commons License
Data DOI:10.5525/gla.researchdata.318

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
6672319UK Quantum Technology Hub in Enhanced Quantum ImagingMiles PadgettEngineering & Physical Sciences Research Council (EPSRC)EP/M01326X/1S&E P&A - PHYSICS & ASTRONOMY