Video-rate terahertz digital holographic imaging system

Humphreys, M., Grant, J.P. , Escorcia-Carranza, I. , Accarino, C., Kenney, M. , Shah, Y.D. , Rew, K.G. and Cumming, D.R.S. (2018) Video-rate terahertz digital holographic imaging system. Optics Express, 26(20), pp. 25805-25813. (doi:10.1364/OE.26.025805)

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Abstract

Terahertz (THz) imaging has been demonstrated in numerous applications from medical to non-destructive evaluation (NDE), but current systems require expensive components, provide slow frame-rates and low resolutions. THz holography offers a potentially low-cost, high-performance alternative. Here we demonstrate the first full video-rate THz digital holography system at 2.52 THz (118.8 µm) using low-cost optical components. 2D digital reconstructions of samples are performed at frame-rates of 50 Hz - an order of magnitude higher than previous systems, whilst imaging of samples concealed in common packaging types demonstrates suitability for NDE applications. A lateral resolution of 250 µm was determined using a 1951 USAF target.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Kenney, Dr Mitchell Guy and Accarino, Claudio and Escorcia Carranza, Dr Ivonne and Grant, Dr James and Cumming, Professor David and Rew, Miss Kirsty and Humphreys, Mark and Shah, Dr Yash Diptesh
Authors: Humphreys, M., Grant, J.P., Escorcia-Carranza, I., Accarino, C., Kenney, M., Shah, Y.D., Rew, K.G., and Cumming, D.R.S.
College/School:College of Science and Engineering > School of Engineering > Electronics and Nanoscale 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
Copyright Holders:Copyright © 2018 Journal
First Published:First published in Optics Express 26(20):25805-25813
Publisher Policy:Reproduced under a Creative Commons License

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
636381EPSRC Centre for Doctoral Training in Sensing and MeasurementAndrew HarveyEngineering and Physical Sciences Research Council (EPSRC)EP/L016753/1SCHOOL OF PHYSICS & ASTRONOMY
588332Triple wavelength superspectral camera focal-plane array (SUPERCAMERA)David CummingEngineering and Physical Sciences Research Council (EPSRC)EP/J018678/1ENG - ENGINEERING ELECTRONICS & NANO ENG