High Resolution Lensless Terahertz Imaging and Ranging
In this paper, we propose a fast terahertz time-domain imaging method using a radar migration algorithm. We demonstrate high-resolution imaging in reflection without any collimating or focusing optics in the terahertz beam. In the proposed method, the sample is illuminated with a divergent terahertz...
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| Format: | Article |
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IEEE
2019-01-01
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| Series: | IEEE Access |
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| Online Access: | https://ieeexplore.ieee.org/document/8794515/ |
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| _version_ | 1850146560162136064 |
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| author | Dilyan Damyanov Benedikt Friederich Milad Yahyapour Nico Vieweg Anselm Deninger Kevin Kolpatzeck Xuan Liu Andreas Czylwik Thorsten Schultze Ingolf Willms Jan C. Balzer |
| author_facet | Dilyan Damyanov Benedikt Friederich Milad Yahyapour Nico Vieweg Anselm Deninger Kevin Kolpatzeck Xuan Liu Andreas Czylwik Thorsten Schultze Ingolf Willms Jan C. Balzer |
| author_sort | Dilyan Damyanov |
| collection | DOAJ |
| description | In this paper, we propose a fast terahertz time-domain imaging method using a radar migration algorithm. We demonstrate high-resolution imaging in reflection without any collimating or focusing optics in the terahertz beam. In the proposed method, the sample is illuminated with a divergent terahertz beam, and the receiver collects both specular and diffuse reflections. We further present calibration and post-processing methods that allow us to compensate for the inherently low signal-to-noise ratio of an unfocused terahertz beam. The feasibility of the novel imaging method is demonstrated with geometrically complex samples and a fast terahertz time-domain spectroscopy system based on electronically controlled optical sampling. We show that our concept is capable of generating images of the objects regardless of their size, shape, orientation and position relative to the transmitter and receiver antennas. Objects with edge lengths well below <inline-formula> <tex-math notation="LaTeX">$400\,\mu \text {m}$ </tex-math></inline-formula> can be clearly detected. The method presented here thus lends itself to arbitrary scenarios and antenna configurations. |
| format | Article |
| id | doaj-art-c6cd1cd916ad4f47adf3f634a2397bbc |
| institution | OA Journals |
| issn | 2169-3536 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Access |
| spelling | doaj-art-c6cd1cd916ad4f47adf3f634a2397bbc2025-08-20T02:27:49ZengIEEEIEEE Access2169-35362019-01-01714770414771210.1109/ACCESS.2019.29345828794515High Resolution Lensless Terahertz Imaging and RangingDilyan Damyanov0https://orcid.org/0000-0002-9100-9451Benedikt Friederich1Milad Yahyapour2Nico Vieweg3Anselm Deninger4Kevin Kolpatzeck5Xuan Liu6Andreas Czylwik7Thorsten Schultze8Ingolf Willms9Jan C. Balzer10Chair of Communication Systems, University of Duisburg-Essen, Duisburg, GermanyChair of Communication Systems, University of Duisburg-Essen, Duisburg, GermanyTOPTICA Photonics AG, Gräfelfing, GermanyTOPTICA Photonics AG, Gräfelfing, GermanyTOPTICA Photonics AG, Gräfelfing, GermanyChair of Communication Systems, University of Duisburg-Essen, Duisburg, GermanyChair of Communication Systems, University of Duisburg-Essen, Duisburg, GermanyChair of Communication Systems, University of Duisburg-Essen, Duisburg, GermanyChair of Communication Systems, University of Duisburg-Essen, Duisburg, GermanyChair of Communication Systems, University of Duisburg-Essen, Duisburg, GermanyChair of Communication Systems, University of Duisburg-Essen, Duisburg, GermanyIn this paper, we propose a fast terahertz time-domain imaging method using a radar migration algorithm. We demonstrate high-resolution imaging in reflection without any collimating or focusing optics in the terahertz beam. In the proposed method, the sample is illuminated with a divergent terahertz beam, and the receiver collects both specular and diffuse reflections. We further present calibration and post-processing methods that allow us to compensate for the inherently low signal-to-noise ratio of an unfocused terahertz beam. The feasibility of the novel imaging method is demonstrated with geometrically complex samples and a fast terahertz time-domain spectroscopy system based on electronically controlled optical sampling. We show that our concept is capable of generating images of the objects regardless of their size, shape, orientation and position relative to the transmitter and receiver antennas. Objects with edge lengths well below <inline-formula> <tex-math notation="LaTeX">$400\,\mu \text {m}$ </tex-math></inline-formula> can be clearly detected. The method presented here thus lends itself to arbitrary scenarios and antenna configurations.https://ieeexplore.ieee.org/document/8794515/Terahertz time-domain spectroscopylensless terahertz imagingECOPSradar migration algorithms |
| spellingShingle | Dilyan Damyanov Benedikt Friederich Milad Yahyapour Nico Vieweg Anselm Deninger Kevin Kolpatzeck Xuan Liu Andreas Czylwik Thorsten Schultze Ingolf Willms Jan C. Balzer High Resolution Lensless Terahertz Imaging and Ranging IEEE Access Terahertz time-domain spectroscopy lensless terahertz imaging ECOPS radar migration algorithms |
| title | High Resolution Lensless Terahertz Imaging and Ranging |
| title_full | High Resolution Lensless Terahertz Imaging and Ranging |
| title_fullStr | High Resolution Lensless Terahertz Imaging and Ranging |
| title_full_unstemmed | High Resolution Lensless Terahertz Imaging and Ranging |
| title_short | High Resolution Lensless Terahertz Imaging and Ranging |
| title_sort | high resolution lensless terahertz imaging and ranging |
| topic | Terahertz time-domain spectroscopy lensless terahertz imaging ECOPS radar migration algorithms |
| url | https://ieeexplore.ieee.org/document/8794515/ |
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