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15 November 1994 Visualizing cross sections of 3D turbulent flows using a modified white light Lau interferometer
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Proceedings Volume 2248, Optical Measurements and Sensors for the Process Industries; (1994)
Event: Optics for Productivity in Manufacturing, 1994, Frankfurt, Germany
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.
© (1994) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Leslie S. Mair, Peter Waddell, Mathew Stickland, Steven Mason, and Stuart McKay "Visualizing cross sections of 3D turbulent flows using a modified white light Lau interferometer", Proc. SPIE 2248, Optical Measurements and Sensors for the Process Industries, (15 November 1994);


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