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Digital interferometry for flow visualization

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Abstract

Digital holographic interferometry is a hybrid optical-digital technique for determining the phase of an interferogram. This technique improves the accuracy of interferometric measurement of fluid properties and enhances the utility of interferometric flow visualization. Displays of the interferometric phase produce excellent images of weakly refracting two-dimensional flows and can be used to produce integral projection images of three dimensional flows which differ from and complement schlieren and shadowgraph images. The technique is explained herein and examples of its use in both continuous wave and pulsed interferometry are presented.

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Authors and Affiliations

  1. Department of Mechanical Engineering, University of Michigan, 48109, Ann Arbor, MI, USA

    D. W. Watt & C. M. Vest

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  1. D. W. Watt
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  2. C. M. Vest
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Watt, D.W., Vest, C.M. Digital interferometry for flow visualization. Experiments in Fluids 5, 401–406 (1987). https://doi.org/10.1007/BF00264404

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  • DOI: https://doi.org/10.1007/BF00264404

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