Real-time video rate terahertz digital holographic imaging system

Humphreys, Mark (2019) Real-time video rate terahertz digital holographic imaging system. PhD thesis, University of Glasgow.

Abstract

Terahertz (THz) radiation describes electromagnetic (EM) radiation with a frequency of between 0.1-10 THz. There has been widespread interest in THz imaging which has been demonstrated in numerous applications from medical to non-destructive evaluation (NDE) due to the unique properties of radiation at these wavelengths. Current THz imaging systems suffer many drawbacks including the requirement of expensive components, slow imaging frame-rates and poor resolution. In this thesis, a digital THz holography system is demonstrated which could offer a high-performance and potentially low-cost alternative. The design and implementation of the first full video-rate (50 Hz) THz digital holography system is presented in this thesis. The system operates with coherent radiation of 2.52 THz (118.8 µm) and features low-cost optical components. The system’s ability for imaging concealed objects is shown which suggests potential as a NDE tool. The potential to be used as a 3D depth imaging tool is also shown. The publication relating to this work along with the movies and data-set can be found from the following reference along with in the thesis data-set: M. Humphreys, J. Grant, I. Escorcia-Carranza, C. Accarino, M. Kenney, Y. Shah, K. Rew, and D. Cumming, "Video-rate terahertz digital holographic imaging system," Opt. Express 26, 25805-25813 (2018).

• Item Type: Thesis (PhD)
• Qualification Level: Doctoral
• Keywords: THz, terahertz, holography.
• Subjects: Q Science > QC Physics; T Technology > TK Electrical engineering. Electronics Nuclear engineering
• Colleges/Schools: College of Science and Engineering > School of Engineering
• Funder's Name: Engineering and Physical Sciences Research Council (EPSRC)
• Supervisor's Name: Cumming, Prof. David
• Date of Award: 2019
• Depositing User: Mark Humphreys
• Unique ID: glathesis:2019-75048
• Copyright: Copyright of this thesis is held by the author.
• Date Deposited: 11 Oct 2019 10:14
• Last Modified: 27 Jul 2022 09:01
• Thesis DOI: 10.5525/gla.thesis.75048
• URI: https://theses.gla.ac.uk/id/eprint/75048

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