EPJ Web of Conferences (Jan 2022)

Quantitative Schlieren imaging based on fringe projection

  • Psota Pavel,
  • Stašík Marek,
  • Kredba Jan,
  • Lédl Vít,
  • Jašíková Darina,
  • Kotek Michal,
  • Kopecký Václav

DOI
https://doi.org/10.1051/epjconf/202226401034
Journal volume & issue
Vol. 264
p. 01034

Abstract

Read online

An effective yet simple quantitative synthetic Schlieren imaging technique is presented in this paper. A multiplexed fringe pattern displayed on a common laptop screen is observed through a disturbed medium resulting in a change of the fringe pattern. Fourier analysis of such pattern provides high-resolution and almost real time measurement of rays’ deflection due to the medium refractive index variation. The developed technique was applied for measurement of a compressible fluid discharge from a narrow channel in a wind tunnel.