Image formation in the geometrical optics by means of the Pierre Lucie's graphical method

In this work we recover and update a graphical method introduced by Prof. Pierre Lucie (1917 – 1985) in the study of image formation by thin lens. The method is associated by us with the modern technologies of information and communication through a PheT simulation that allows the visualization of image formation and the acquisition of the conjugated points. We also make use of the dynamical geometry software GeoGebra to analyze the data and obtain Gauss’ equation for conjugated points. A class-oriented procedure for the teaching of image formation by thin lens was prepared and applied at the high-school level. Results indicate that this updated graphical method may be potentially significant.