Sökning: "Structured Illumination"

Visar resultat 1 - 5 av 19 avhandlingar innehållade orden Structured Illumination.

  1. 1. Structured Laser Illumination Planar Imaging SLIPI Applications for Spray Diagnostics

    Författare :Elias Kristensson; Förbränningsfysik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; signal attenuation; Multiple light scattering suppression; laser extinction; extinction coefficient; structured illumination; Fysicumarkivet A:2012:Kristensson;

    Sammanfattning : Laser sheet imaging, also known as planar laser imaging, is one of the most versatile optical imaging techniques known and is frequently applied in several different domains. It furthermore constitutes the basis for a variety of other 2D methods, in turn allowing visualization of e.g. velocity, particle size, species concentration and temperature. LÄS MER

  2. 2. Structured Light for Ultrafast Videography

    Författare :Vassily Kornienko; Förbränningsfysik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Structured Light; FRAME; Coherence Lifetime Imaging; Optical Diagnostics; Ultrafast Videography; Strukturerad Belysning; FRAME; Koherent Livstidsavbildning; Optisk diagnostik; Ultrasnabb videografi;

    Sammanfattning : Monitoring natural events at ultrafast timescales is a prerequisite for our continued understanding of physical, chemical and biological processes. Due to exponential advancements in knowledge and optical technology, the field of ultrafast videography has seen a sudden uptick in activity beginning in the mid-2010s. LÄS MER

  3. 3. Frequency Recognition Algorithm for Multiple Exposures : Snapshot imaging using coded light

    Författare :Karolina Dorozynska; Förbränningsfysik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Snapshot imaging; structured illumination; structured light; multispectral; fluorescence; frequency encoding; image multiplexing; lock-in detection; Fysicumarkivet A:2020:Dorozynska;

    Sammanfattning : The central challenge tackled in this thesis is the development of an optical imaging approach capable of multidimensional image capture of dynamic samples. Many conventional optical imaging approaches, which can obtain dimensional information such as spectral, polarisation, or volumetric, to name a few, about samples either employ sequential image capture or parallelised detector arrangements. LÄS MER

  4. 4. High-speed 3D imaging of liquid jets, surfaces and respiratory droplets

    Författare :Adrian Roth; Förbränningsfysik; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; Laser Induced Fluorescence; Volumetric imaging; Structured Illumination; 3D Reconstruction; Stereoscopy; 3D Particle Tracking Velocimetry; COVID­19; sprays; respiratory droplets; Fysicumarkivet A:2023:Roth;

    Sammanfattning : Sprays are commonly found in, among other, combustion, agriculture and food processing. For each of these applications, the understanding of spray liquid dynamics is crucial for optimization of efficiency, accuracy, and robustness of the spray­-system in use. LÄS MER

  5. 5. Multi-Dimensional Quantitative Laser-based Diagnostics - Development and Practial Applications

    Författare :Rikard Wellander; Förbränningsfysik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Post injection; Structured illumination; Mie scattering; Dense sprays; Extinction coefficient; Signal attenuation; Laser extinction; Multiple scattering; Scattering measurements; Planar laser induced fluorescence; Time resolved; Imaging through turbulent media; Three-dimensional image acquisition; Diesel particulate filter regeneration; Wall impingent; Biodiesel; LII; Large-bore gas Engine; Pre-chamber ignition; Fysicumarkivet A:2014:Wellander;

    Sammanfattning : Laser based optical diagnostic methods are routinely used in combustion research. Many of the more common approaches are based on illuminating a cross-section of the sample with a thin laser sheet. For example, by targeting an electronic transition in a molecule, its concentration within the plane illuminated by the laser sheet can be deduced. LÄS MER