Micropipe flow visualization using digital in-line holographic microscopy

Digital in-line holography is used to visualize particle motion within a cylindrical micropipe. Analytical expression of the intensity distribution recorded in the CCD sensor plane is derived using the generalized Huygens-Fresnel integral associated with the ABCD matrices formalism. Holograms obtain...

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Bibliographic Details
Published in:Optics express 2010-04, Vol.18 (8), p.7807-7819
Main Authors: Verrier, Nicolas, Remacha, Clément, Brunel, Marc, Lebrun, Denis, Coëtmellec, Sébastien
Format: Article
Language:English
Subjects:
Optics
Physics
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Summary:Digital in-line holography is used to visualize particle motion within a cylindrical micropipe. Analytical expression of the intensity distribution recorded in the CCD sensor plane is derived using the generalized Huygens-Fresnel integral associated with the ABCD matrices formalism. Holograms obtained in a 100microm in diameter micropipe are then reconstructed using fractional Fourier transformation. Astigmatism brought by the cylindrical micropipe is finally used to select a three dimensional region of interest in the microflow and thus to improve axial localization of objects located within a micropipe. Experimental results are presented and a short movie showing particle motion within a micropipe is given.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.18.007807