Penketh, H., Ergoktas, M.S., Lawrence, C.R. et al. (4 more authors) (2024) Real-time millimeter wave holography with an arrayed detector. Optics Express, 32 (4). pp. 5783-5792. ISSN 1094-4087
Abstract
Millimeter and terahertz wave imaging has emerged as a powerful tool for applications such as security screening, biomedical imaging, and material analysis. However, intensity images alone are often insufficient for detecting variations in the dielectric constant of a sample, and extraction of material properties without additional phase information requires extensive prior knowledge of the sample. Digital holography provides a means for intensity-only detectors to reconstruct both amplitude and phase images. Here we utilize a commercially available source and detector array, both operating at room temperature, to perform digital holography in real-time for the first time in the mm-wave band (at 290 GHz). We compare the off-axis and phase-shifting approaches to digital holography and discuss their trade-offs and practical challenges in this regime. Owing to the low pixel count, we find phase-shifting holography to be the most practical and high fidelity approach for such commercial mm-wave cameras even under real-time operational requirements.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | Journal © 2024. Published by Optica Publishing Group under the terms of the Creative Commons Attribution 4.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Electronic & Electrical Engineering (Leeds) > Pollard Institute (Leeds) |
Funding Information: | Funder Grant number EPSRC (Engineering and Physical Sciences Research Council) EP/V004743/1 EPSRC (Engineering and Physical Sciences Research Council) EP/V047914/1 EPSRC (Engineering and Physical Sciences Research Council) EP/W028921/1 |
Depositing User: | Symplectic Publications |
Date Deposited: | 29 Jan 2024 12:07 |
Last Modified: | 09 Feb 2024 17:08 |
Status: | Published |
Publisher: | Optica Publishing Group |
Identification Number: | 10.1364/OE.513852 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:208364 |