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Simultaneous multiple time scale imaging for kHz-MHz high-speed accelerometry

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Název: Simultaneous multiple time scale imaging for kHz-MHz high-speed accelerometry
Autoři: Kornienko, Vassily, Andersson, David, Stiti, Mehdi, Ravelid, Jonas, Ek, Simon, Ehn, Andreas, Berrocal, Edouard, Kristensson, Elias
Přispěvatelé: Lund University, Faculty of Engineering, LTH, LTH Profile areas, LTH Profile Area: The Energy Transition, Lunds universitet, Lunds Tekniska Högskola, LTH profilområden, LTH profilområde: Energiomställningen, Originator, Lund University, Faculty of Science, Department of Physics, Combustion Physics, Lunds universitet, Naturvetenskapliga fakulteten, Fysiska institutionen, Förbränningsfysik, Originator, Lund University, Faculty of Engineering, LTH, LTH Profile areas, LTH Profile Area: Engineering Health, Lunds universitet, Lunds Tekniska Högskola, LTH profilområden, LTH profilområde: Teknik för hälsa, Originator, Lund University, Faculty of Engineering, LTH, LTH Profile areas, LTH Profile Area: Photon Science and Technology, Lunds universitet, Lunds Tekniska Högskola, LTH profilområden, LTH profilområde: Avancerade ljuskällor, Originator
Zdroj: Photonics Research Towards quantitative imaging using coded light Optical Multiplexing for Ultrafast Videography Strukturerad belysning för Ultrasnabb Videografi Structured Light for Ultrafast Videography. 10(7):1712-1722
Témata: Natural Sciences, Computer and Information Sciences, Computer graphics and computer vision, Naturvetenskap, Data- och informationsvetenskap (Datateknik), Datorgrafik och datorseende
Popis: Fast transient events, such as the disintegration of liquid bodies or chemical reactions between radical species, involve various processes that may occur at different time scales. Currently, there are two alternatives for monitoring such events: burst- or high-speed imaging. Burst imaging at ultrahigh speeds (∼100 MHz to THz) allows for the capture of nature's fastest processes but only for a narrowly confined period of time and at a repetition rate of ∼10 Hz. Monitoring long lasting, rapidly evolving transient events requires a significantly higher repetition rate, which is met by existing ∼kHz to 1 MHz high-speed imaging technology. However, the use of such systems eliminates the possibility to observe dynamics occurring on the sub-microsecond time scale. In this paper, we present a solution to this technological gap by combining multiplexed imaging with high-speed sensor technology, resulting in temporally resolved, high-spatial-resolution image series at two simultaneous time scales. We further demonstrate how the collection of such data opens up the tracking of rapidly evolving structures up to MHz burst rates over long durations, allowing, for the first time, to our knowledge, the extraction of acceleration fields acting upon the liquid bodies of an atomizing spray in two dimensions at kHz frame rates.
Přístupová URL adresa: https://doi.org/10.1364/PRJ.451108
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  Data: Simultaneous multiple time scale imaging for kHz-MHz high-speed accelerometry
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  Data: Lund University, Faculty of Engineering, LTH, LTH Profile areas, LTH Profile Area: The Energy Transition, Lunds universitet, Lunds Tekniska Högskola, LTH profilområden, LTH profilområde: Energiomställningen, Originator<br />Lund University, Faculty of Science, Department of Physics, Combustion Physics, Lunds universitet, Naturvetenskapliga fakulteten, Fysiska institutionen, Förbränningsfysik, Originator<br />Lund University, Faculty of Engineering, LTH, LTH Profile areas, LTH Profile Area: Engineering Health, Lunds universitet, Lunds Tekniska Högskola, LTH profilområden, LTH profilområde: Teknik för hälsa, Originator<br />Lund University, Faculty of Engineering, LTH, LTH Profile areas, LTH Profile Area: Photon Science and Technology, Lunds universitet, Lunds Tekniska Högskola, LTH profilområden, LTH profilområde: Avancerade ljuskällor, Originator
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  Data: <i>Photonics Research Towards quantitative imaging using coded light Optical Multiplexing for Ultrafast Videography Strukturerad belysning för Ultrasnabb Videografi Structured Light for Ultrafast Videography</i>. 10(7):1712-1722
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  Data: Fast transient events, such as the disintegration of liquid bodies or chemical reactions between radical species, involve various processes that may occur at different time scales. Currently, there are two alternatives for monitoring such events: burst- or high-speed imaging. Burst imaging at ultrahigh speeds (∼100 MHz to THz) allows for the capture of nature's fastest processes but only for a narrowly confined period of time and at a repetition rate of ∼10 Hz. Monitoring long lasting, rapidly evolving transient events requires a significantly higher repetition rate, which is met by existing ∼kHz to 1 MHz high-speed imaging technology. However, the use of such systems eliminates the possibility to observe dynamics occurring on the sub-microsecond time scale. In this paper, we present a solution to this technological gap by combining multiplexed imaging with high-speed sensor technology, resulting in temporally resolved, high-spatial-resolution image series at two simultaneous time scales. We further demonstrate how the collection of such data opens up the tracking of rapidly evolving structures up to MHz burst rates over long durations, allowing, for the first time, to our knowledge, the extraction of acceleration fields acting upon the liquid bodies of an atomizing spray in two dimensions at kHz frame rates.
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