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Numerical Analysis of Interference Patterns (view source)
Revision as of 18:29, 3 October 2007
, 18:29, 3 October 2007→Fourier Analysis Method
== Fourier Analysis Method ==
== Fourier Analysis Method ==
The Fourier Analysis method of interferograms was created in 1982 by M. Takeda, H. Ina and S. Kobayashi and originally intended as an alternative to Moire Topography and the phase-shifting technique [1,2]. However, this method was ineffective at analyzing closed fringe patterns. A revision to the method, solved this problem by utilizing a Cartesian to polar coordinate transform [3]. The result of which could then be analyzed using the original method proposed.
* requires carrier frequency, narrow frequency, low noise and open fringes
* requires carrier frequency, narrow frequency, low noise and open fringes
* estimates the phase wrapped (via arctan)
* estimates the phase wrapped (via arctan)