Quiroga Mellado, Juan AntonioServín Guirado, ManuelMarroquín Zaleta, José Luis2023-06-202023-06-202002-010957-023310.1088/0957-0233/13/1/317https://hdl.handle.net/20.500.14352/58781© 2002 IOP Publishing Ltd. We wish to thank the European Union, project INDUCE, BRPR-CT97-0805, for financial support of this work. MS and JLM were supported in part by grants from Conacyt, México.In this work we propose a robust fringe demodulation technique applied to the analysis of tricolour isochromatic fringe patterns produced in photoelasticity. The method used is a regularized phase tracking (RPT) algorithm, which takes into account the different information contained in the three bands of the colour image obtained with an RGB-CCD camera. Automatic determination of the zero-order isochromatic and the area of interest, the use of a discrete fluorescent illumination and the use of the RPT configures a robust method for automatic demodulation of isochromatic fringe patterns. The performance of the method is discussed and experimental results are presented.engjournal articlehttp://dx.doi.org/10.1088/0957-0233/13/1/317http://iopscience.iop.orgopen access535PhotoelasticityÓptica (Física)2209.19 Óptica Física