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Proceedings Paper

Simultaneous measurements of density field and wavefront distortions in high speed flows
Author(s): Jacob George; Thomas Jenkins; James Trolinger; Cecil Hess; Benjamin Buckner
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Paper Abstract

This paper presents results from simultaneous measurements of fluid density and the resulting wavefront distortions in a sonic underexpanded jet. The density measurements were carried out using Rayleigh scattering, and the optical distortions were measured using a wavefront sensor based on phase shifting interferometry. The measurements represent a preliminary step toward relating wavefront distortions to a specific flow structure. The measured density field is used to compute the phase distortions using a wave propagation model based on a geometric-optics approximation, and the computed phase map shows moderate agreement with that obtained using the wavefront sensor.

Paper Details

Date Published: 6 September 2017
PDF: 8 pages
Proc. SPIE 10410, Unconventional and Indirect Imaging, Image Reconstruction, and Wavefront Sensing 2017, 1041006 (6 September 2017); doi: 10.1117/12.2275883
Show Author Affiliations
Jacob George, MetroLaser, Inc. (United States)
Thomas Jenkins, MetroLaser, Inc. (United States)
James Trolinger, MetroLaser, Inc. (United States)
Cecil Hess, MetroLaser, Inc. (United States)
Benjamin Buckner, Spectabit Optics, LLC (United States)

Published in SPIE Proceedings Vol. 10410:
Unconventional and Indirect Imaging, Image Reconstruction, and Wavefront Sensing 2017
Jean J. Dolne; Rick P. Millane, Editor(s)

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