Experiments in Fluids

, Volume 21, Issue 1, pp 11–16

High data density temperature measurement for quasi steady-state flows

  • C. R. Mercer
  • N. Rashidnia
  • K. Creath
Originals

Abstract

A new optical instrument, the liquid crystal point diffraction interferometer (LCPDI), is used to measure the temperature distribution across a heated chamber filled with silicone oil. Data taken using the LCPDI are compared to equivalent measurements made with a traversing thermocouple and the two data sets show excellent agreement. This instrument maintains the compact, robust design of Linnik's point diffraction interferometer and adds to it phase stepping capability for quantitative interferogram analysis. The result is a compact, simple to align, environmentally insensitive interferometer capable of accurately measuring optical wavefronts with very high data density and with automated data reduction.

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Copyright information

© Springer-Verlag 1996

Authors and Affiliations

  • C. R. Mercer
    • 1
  • N. Rashidnia
    • 2
  • K. Creath
    • 3
  1. 1.NASA Lewis Research CenterClevelandUSA
  2. 2.NYMA, Inc., NASA LeRCClevelandUSA
  3. 3.University of Arizona, Optical Science CenterTucsonUSA

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