A direct method of continuous unwrapping the phase from an interferogram image

TL;DR

This paper introduces a novel direct method for unwrapping phase from interferogram images, which effectively avoids discontinuity issues by solving a differential equation based on fringe intensity profiles.

Contribution

The proposed approach provides a new continuous phase recovery technique that bypasses traditional unwrapping challenges by utilizing differential equations derived from fringe data.

Findings

Successfully recovers continuous phase from interferograms

Avoids phase discontinuity problems common in traditional methods

Demonstrates effectiveness through simulated or experimental data

Abstract

A new method recovers phase difference of interfering wavefronts from a pattern of interference fringes, avoiding discontinuity problem. The continuous phase is a solution of the first order differential equation of the interferogram function computed from the fringe intensity profile selected along the pathway over the interferogram.