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Wide-field Intensity Fluctuation Imaging.

ABSTRACT: The temporal intensity fluctuations contain important information about the light source and light-medium interaction and are typically characterized by the intensity autocorrelation function, g2(τ). The measurement of g2(τ) 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, g2(τ) at a single point is readily accessible through high-frequency sampling of the intensity signal. However, two-dimensional wide-field measurement of g2(τ) 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 g2(τ) map in wide field with cameras of only ordinary frame rates.

SUBMITTER: Fang Q

PROVIDER: S-EPMC10402166 | biostudies-literature | 2023 Jul

REPOSITORIES: biostudies-literature

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Wide-field Intensity Fluctuation Imaging.

Fang Qingwei Q Tomar Alankrit A Dunn Andrew K AK

bioRxiv : the preprint server for biology 20230729

The temporal intensity fluctuations contain important information about the light source and light-medium interaction and are typically characterized by the intensity autocorrelation function, g2(τ). The measurement of g2(τ) 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, g2(τ) at a single poin ...[more]

PMID: 37546910

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