2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/85890We developed a specific numerical fitting procedure, based on the least squares method, to calculate the parameters of the polarization ellipse by only using a single polarizer and a detection device for measuring the outgoing intensities.8 pages, 4 figures, PDF from MsWord. Corrected version. Previous version published in Physica MacedonicaOpticsComputational PhysicsPhysics Educationtext