Video-rate terahertz digital holographic imaging system

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...

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Bibliographic Details
Published in:Optics express 2018-10, Vol.26 (20), p.25805-25813
Main Authors: Humphreys, M, Grant, J P, Escorcia-Carranza, I, Accarino, C, Kenney, M, Shah, Y D, Rew, K G, Cumming, D R S
Format: Article
Language:English
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Summary: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.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.26.025805