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Proceedings Paper

Visualizing cross sections of 3D turbulent flows using a modified white light Lau interferometer
Author(s): Leslie S. Mair; Peter Waddell; Mathew Stickland; Steven Mason; Stuart McKay
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Paper Abstract

A simple white light fringe interferometer is described, which is capable of displaying the phase information from one plane selected in a fluid. By using the correct optics the plane thickness and its position in the fluid can be chosen. An examination of the optical principles of the Lau type interferometer produced conclusions as to how the unit will be developed in the future. Previously published Lau type interferometers have used small diameter, well corrected, relatively expensive lenses (usually with large f-number) to examine small cross sectional flows. The authors intend to use optically accurate, very large diameter, variable focus, mirror finish plastic membrane concave mirrors of any desired f-number. Such mirrors result in any desired plane thickness in any desired position, for fluid flows of very large cross section. Such an important engineering development is already underway and will be reported in future papers.

Paper Details

Date Published: 15 November 1994
PDF: 12 pages
Proc. SPIE 2248, Optical Measurements and Sensors for the Process Industries, (15 November 1994); doi: 10.1117/12.194327
Show Author Affiliations
Leslie S. Mair, Glasgow Caledonian Univ. (United Kingdom)
Peter Waddell, Univ. of Strathclyde (United Kingdom)
Mathew Stickland, Univ. of Strathclyde (United Kingdom)
Steven Mason, Univ. of Strathclyde (United Kingdom)
Stuart McKay, Univ. of Strathclyde (United Kingdom)

Published in SPIE Proceedings Vol. 2248:
Optical Measurements and Sensors for the Process Industries
Christophe Gorecki; Richard W. T. Preater, Editor(s)

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