Holographic particle-streak velocimetry

Lisa Dixon, Fook Chiong Cheong, David G. Grier

    Research output: Contribution to journalArticle

    Abstract

    We present a way to measure the positions and instantaneous velocities of micrometer-scale colloidal spheres using a single holographic snapshot obtained through in-line holographic video microscopy. This method builds on previous quantitative analyses of colloidal holograms by accounting for blurring that occurs as a sphere moves during the camera's exposure time. The angular variance of a blurred hologram's radial intensity profile yields both the magnitude and direction of a sphere's in-plane velocity. At sufficiently low speeds, the same hologram also can be used to characterize other properties, such as the sphere's radius and refractive index.

    Original languageEnglish (US)
    Pages (from-to)4393-4398
    Number of pages6
    JournalOptics Express
    Volume19
    Issue number5
    DOIs
    StatePublished - Feb 28 2011

    Fingerprint

    blurring
    low speed
    micrometers
    cameras
    refractivity
    microscopy
    radii
    profiles

    ASJC Scopus subject areas

    • Atomic and Molecular Physics, and Optics

    Cite this

    Dixon, L., Cheong, F. C., & Grier, D. G. (2011). Holographic particle-streak velocimetry. Optics Express, 19(5), 4393-4398. https://doi.org/10.1364/OE.19.004393

    Holographic particle-streak velocimetry. / Dixon, Lisa; Cheong, Fook Chiong; Grier, David G.

    In: Optics Express, Vol. 19, No. 5, 28.02.2011, p. 4393-4398.

    Research output: Contribution to journalArticle

    Dixon, L, Cheong, FC & Grier, DG 2011, 'Holographic particle-streak velocimetry', Optics Express, vol. 19, no. 5, pp. 4393-4398. https://doi.org/10.1364/OE.19.004393
    Dixon L, Cheong FC, Grier DG. Holographic particle-streak velocimetry. Optics Express. 2011 Feb 28;19(5):4393-4398. https://doi.org/10.1364/OE.19.004393
    Dixon, Lisa ; Cheong, Fook Chiong ; Grier, David G. / Holographic particle-streak velocimetry. In: Optics Express. 2011 ; Vol. 19, No. 5. pp. 4393-4398.
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