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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Abstract
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 |
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Status: | Published |
Refereed: | Yes |
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: | 1094-4087 |
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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