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Wide-field Intensity Fluctuation Imaging
The temporal intensity fluctuations contain important information about the light source and light-medium interaction and are typically characterized by the intensity autocorrelation function, [Formula: see text]. The measurement of [Formula: see text] is a central topic in many optical sensing appl...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Cold Spring Harbor Laboratory
2023
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10402166/ https://www.ncbi.nlm.nih.gov/pubmed/37546910 http://dx.doi.org/10.1101/2023.07.29.551117 |
Sumario: | The temporal intensity fluctuations contain important information about the light source and light-medium interaction and are typically characterized by the intensity autocorrelation function, [Formula: see text]. The measurement of [Formula: see text] is a central topic in many optical sensing applications, ranging from stellar intensity interferometer in astrophysics, to fluorescence correlation spectroscopy in biomedical sciences and blood flow measurement with dynamic light scattering. Currently, [Formula: see text] at a single point is readily accessible through high-frequency sampling of the intensity signal. However, two-dimensional wide-field measurement of [Formula: see text] is still limited by camera frame rates. We propose and demonstrate a 2-pulse within-exposure modulation approach to break through the camera frame rate limit and obtain the quasi [Formula: see text] map in wide field with cameras of only ordinary frame rates. |
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