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Fast THz-TDS Reflection Imaging with ECOPS—Point-by-Point versus Line-by-Line Scanning

We built a high-speed TDS setup with the use of electronically controlled optical sampling (ECOPS), which can measure up to 1600 terahertz pulses per second. The movement of the sample was provided by two fast-speed motorized linear stages constituting the gantry. We developed a flat-bar-based metal...

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Autores principales: Pałka, Norbert, Maciejewski, Marcin, Kamiński, Kamil, Piszczek, Marek, Zagrajek, Przemysław, Czerwińska, Elżbieta, Walczakowski, Michał, Dragan, Krzysztof, Synaszko, Piotr, Świderski, Waldemar
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9695950/
https://www.ncbi.nlm.nih.gov/pubmed/36433410
http://dx.doi.org/10.3390/s22228813
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author Pałka, Norbert
Maciejewski, Marcin
Kamiński, Kamil
Piszczek, Marek
Zagrajek, Przemysław
Czerwińska, Elżbieta
Walczakowski, Michał
Dragan, Krzysztof
Synaszko, Piotr
Świderski, Waldemar
author_facet Pałka, Norbert
Maciejewski, Marcin
Kamiński, Kamil
Piszczek, Marek
Zagrajek, Przemysław
Czerwińska, Elżbieta
Walczakowski, Michał
Dragan, Krzysztof
Synaszko, Piotr
Świderski, Waldemar
author_sort Pałka, Norbert
collection PubMed
description We built a high-speed TDS setup with the use of electronically controlled optical sampling (ECOPS), which can measure up to 1600 terahertz pulses per second. The movement of the sample was provided by two fast-speed motorized linear stages constituting the gantry. We developed a flat-bar-based metal marker approach for the synchronization of continuous line-by-line scans. We carefully compared the performance of the terahertz reflection time-domain spectroscopy (TDS) scanner operating in a slow point-by-point and a one-hundred-times faster line-by-line imaging scheme. We analyzed images obtained for both schemes for a uniform metallic breadboard with holes, as well as a glass composite sample with defects. Although the measurement time was reduced by 100 times in terms of the line-by-line scheme, the overall performance in both schemes was almost identical in terms of the defects’ sizes, shapes and locations. The results proved that the proposed ECOPS TDS system can provide uniform and extremely fast scanning without any deterioration in image quality.
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spelling pubmed-96959502022-11-26 Fast THz-TDS Reflection Imaging with ECOPS—Point-by-Point versus Line-by-Line Scanning Pałka, Norbert Maciejewski, Marcin Kamiński, Kamil Piszczek, Marek Zagrajek, Przemysław Czerwińska, Elżbieta Walczakowski, Michał Dragan, Krzysztof Synaszko, Piotr Świderski, Waldemar Sensors (Basel) Article We built a high-speed TDS setup with the use of electronically controlled optical sampling (ECOPS), which can measure up to 1600 terahertz pulses per second. The movement of the sample was provided by two fast-speed motorized linear stages constituting the gantry. We developed a flat-bar-based metal marker approach for the synchronization of continuous line-by-line scans. We carefully compared the performance of the terahertz reflection time-domain spectroscopy (TDS) scanner operating in a slow point-by-point and a one-hundred-times faster line-by-line imaging scheme. We analyzed images obtained for both schemes for a uniform metallic breadboard with holes, as well as a glass composite sample with defects. Although the measurement time was reduced by 100 times in terms of the line-by-line scheme, the overall performance in both schemes was almost identical in terms of the defects’ sizes, shapes and locations. The results proved that the proposed ECOPS TDS system can provide uniform and extremely fast scanning without any deterioration in image quality. MDPI 2022-11-15 /pmc/articles/PMC9695950/ /pubmed/36433410 http://dx.doi.org/10.3390/s22228813 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Pałka, Norbert
Maciejewski, Marcin
Kamiński, Kamil
Piszczek, Marek
Zagrajek, Przemysław
Czerwińska, Elżbieta
Walczakowski, Michał
Dragan, Krzysztof
Synaszko, Piotr
Świderski, Waldemar
Fast THz-TDS Reflection Imaging with ECOPS—Point-by-Point versus Line-by-Line Scanning
title Fast THz-TDS Reflection Imaging with ECOPS—Point-by-Point versus Line-by-Line Scanning
title_full Fast THz-TDS Reflection Imaging with ECOPS—Point-by-Point versus Line-by-Line Scanning
title_fullStr Fast THz-TDS Reflection Imaging with ECOPS—Point-by-Point versus Line-by-Line Scanning
title_full_unstemmed Fast THz-TDS Reflection Imaging with ECOPS—Point-by-Point versus Line-by-Line Scanning
title_short Fast THz-TDS Reflection Imaging with ECOPS—Point-by-Point versus Line-by-Line Scanning
title_sort fast thz-tds reflection imaging with ecops—point-by-point versus line-by-line scanning
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9695950/
https://www.ncbi.nlm.nih.gov/pubmed/36433410
http://dx.doi.org/10.3390/s22228813
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