NDLI: Rayleigh scattering measurements using a tunable liquid crystal fabry-perot interferometer

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Rayleigh scattering measurements using a tunable liquid crystal fabry-perot interferometer

Content Provider	NASA Technical Reports Server (NTRS)
Author	Elam, Kristie A. Mielke-Fagan, Amy F. Clem, Michelle M.
Copyright Year	2010
Description	Spectroscopic Rayleigh scattering is an established flow diagnostic that has the ability to provide simultaneous density, velocity, and temperature measurements. The Fabry-Perot interferometer or etalon is a commonly employed instrument for resolving the spectrum of molecular Rayleigh scattered light for the purpose of evaluating these flow properties. This paper investigates the use of a tunable liquid crystal (LC) Fabry-Perot etalon in Rayleigh scattering experiments at NASA Glenn Research Center. The LC etalon provides a robust interferometry system that can be tuned rapidly by adjusting the voltage applied to the liquid crystal interface. Tuning the interferometer is often necessary to control the physical locations of the concentric interference fringes when Rayleigh light is imaged through the LC etalon. The LC etalon diagnostic system was tested in a 1-cm diameter nozzle flow in two different scattering configurations to evaluate its usefulness for Rayleigh measurements compared to a traditional non-tunable fused silica Fabry-Perot etalon.
File Size	983759
Page Count	15
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_20110016048
Archival Resource Key	ark:/13960/t8ff8rp9z
Language	English
Publisher Date	2010-06-28
Access Restriction	Open
Subject Keyword	Solid-state Physics Spectroscopy Rayleigh Scattering Density Measurement Jet Flow Flow Characteristics Liquid Crystals Light Sources Silica Glass Temperature Measurement Free Jets Nozzle Flow Velocity Measurement Fabry-perot Interferometers Reflectance Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Article

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