Sánchez Brea, Luis MiguelTorcal Milla, Francisco JoséHerrera Fernández, José MaríaMorlanes, TomásBernabeu Martínez, Eusebio2023-06-192023-06-1920140146-959210.1364/OL.39.005764https://hdl.handle.net/20.500.14352/35040© 2014 Optical Society of America. The authors thank to Jose Luis Vilas for his valuable comments. This work has been supported by the Ministry of Science and Innovation of Spain (project DPI2011-27851) and project Art. 83 LOU "Estudio de tecnologia para la realizacion de codificadores opticos de 2 mu m de periodo" with Fagor Automation S. Coop.A simple collimation technique based on measuring the period of one self-image produced by a diffraction grating is proposed. Transversal displacement of the grating is not required, and then automatic single-frame processing can be performed. The self-image is acquired with a CMOS camera, and the period is computed using the variogram function. Analytical and experimental results are obtained, which show the simplicity and accuracy of the proposed technique.engjournal articlehttp://dx.doi.org/10.1364/OL.39.005764https://www.osapublishing.orgopen access535Talbot interferometrySystemPlateÓptica (Física)2209.19 Óptica Física