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Polymer film-based optical access to enclosed gas: demonstration of H2O absorption tomography

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Abstract

We demonstrate the use of a film to enable optical access to enclosed gases. We use absorption tomography to image H2O in a 101.6-mm-diameter duct with 2-mm spatial resolution. Considering the central 94 mm, the standard deviation of the image is 1.6 %, and the average mole fraction error is −0.008 %. A polybenzimidazole film is identified to be a candidate for extending the technique to enable NH3 imaging in a diesel aftertreatment system.

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Acknowledgments

The authors thank Mike Robinson of Cummins, Inc. for providing measurement hardware such as the stainless duct and Michael Zupan of Mark Anderson’s lab for assistance in the FTIR work.

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Authors and Affiliations

  1. Mechanical Engineering Department, University of Wisconsin – Madison, 1500 Engineering Dr., Madison, WI, 53706, USA

    Ze Wang & Scott T. Sanders

  2. Engineering Physics Department, University of Wisconsin – Madison, 1500 Engineering Dr., Madison, WI, 53706, USA

    Mark H. Anderson

Authors
  1. Ze Wang
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  2. Mark H. Anderson
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  3. Scott T. Sanders
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Correspondence to Ze Wang.

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Wang, Z., Anderson, M.H. & Sanders, S.T. Polymer film-based optical access to enclosed gas: demonstration of H2O absorption tomography. Appl. Phys. B 122, 233 (2016). https://doi.org/10.1007/s00340-016-6516-7

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  • DOI: https://doi.org/10.1007/s00340-016-6516-7

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