Quiroga Mellado, Juan AntonioMarroquín Zaleta, José LuisServín Guirado, Manuel2023-06-202023-06-202004-031084-752910.1364/JOSAA.21.000411https://hdl.handle.net/20.500.14352/50817© 2004 Optical Society of America. M. Servín and J. L. Marroquín were partially supported by grants 33429-E and 42523, respectively, from Consejo Nacional de Ciencia y Tecnología (CONACYT), México.A new sequential phase demodulator based on a regularized quadrature and phase tracker system (RAPT) is applied to demodulate two-dimensional fringe patterns. This RQPT system tracks the fringe pattern's quadrature and phase in a sequential way by following the path of the fringes. To make the RAPT system more robust to noise, the modulating phase around a small neighborhood is modeled as a plane and the quadrature of the signal is estimated simultaneously with the fringe's modulating phase. By sequentially calculating the quadrature of the fringe pattern, one obtains a more robust sequential demodulator than was previously possible. This system may be applied to the demodulation of a single interferogram having closed fringes.engjournal articlehttp://dx.doi.org/10.1364/JOSAA.21.000411http://www.opticsinfobase.orgopen access535Pattern-AnalysisDemodulationTransformÓptica (Física)2209.19 Óptica Física