Sánchez Brea, Luis MiguelTorcal Milla, Francisco JoséMorlanes Calvo, Tomás2023-06-172023-06-172016-09-090146-959210.1364/OL.41.004091https://hdl.handle.net/20.500.14352/18973© 2016 Optical Society of America. Universidad Complutense de Madrid (UCM) (art. 83 LOU num. 52-2016).In this Letter, we analyze the near-field diffraction pattern produced by chirped gratings. An intuitive analytical interpretation of the generated diffraction orders is proposed. Several interesting properties of the near-field diffraction pattern can be determined, such as the period of the fringes and its visibility. Diffraction orders present different widths and also, some of them present focusing properties. The width, location, and depth of focus of the converging diffraction orders are also determined. The analytical expressions are compared to numerical simulation and experimental results, showing a high agreement.engjournal articlehttps://doi.org/10.1364/OL.41.004091https://www.osapublishing.org/open access535DiffractionDiffraction gratingsTalbot and self-imaging effectsGratingsChirpingÓptica (Física)2209.19 Óptica Física