This paper proposes the use of the Hilbert transform for analysis of fringe patterns, which are obtained in Michelson
Interferometer. The fringe patterns are evaluated by Continuous wavelet transform and Hilbert transform algorithms to
obtain phase map and refractive index. Continuous wavelet transform algorithm shows a better filtering effect. However
Hilbert transform algorithm gives a noisy result, since its frequency spectrum has harmonic noise. Results show that the
phase map is affected by Hilbert Filter.