AbstractApplication of a confocal scanning laser holography (CSLH) microscope to the study of fluid flow in a microgravity environment is described herein. This microscope offers a new, non-intrusive means to determine three-dimensional density gradients within solid objects, fluids, and plasmas, including flames. The index-of-refraction is determined from the phase measurements of the microscope, which is a function of the object temperature and composition. The object being studied is a fluid-cell chamber, which is heated and cooled on opposing walls to produce a steady-state fluid flow due to convection and heat transfer. The holograms are created from the interference of a “known” reference beam with an “unknown” object beam. A three-dimensional amplitude and phase image of the object is produced by the reconstruction of many holograms, where each hologram represents a scanned point inside the object.


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    Title :

    Non-intrusive, three-dimensional temperature and composition measurements inside fluid cells in microgravity using a confocal holography microscope


    Contributors:
    Jacquemin, P.B. (author) / Laurin, D. (author) / Atalick, S. (author) / McLeod, R. (author) / Lai, S. (author) / Herring, R.A. (author)

    Published in:

    Acta Astronautica ; 60 , 8-9 ; 723-727


    Publication date :

    2006-10-24


    Size :

    5 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English