Torcal Milla, Francisco JoséSánchez Brea, Luis MiguelBernabeu Martínez, Eusebio2023-06-202023-06-202007-06-201559-128X10.1364/AO.46.003668https://hdl.handle.net/20.500.14352/51189© 2007 Optical Society of America. This work has been supported by the DPI2005- 02860 project of the Ministerio de Educación y Ciencia of Spain and the “Tecnologías en ecología, alta precisión y productividad, multifuncionalidad, y tecnologías de la información y comunicaciones en Máquina Herramienta” CENIT project of the Ministerio de Industria, turismo y comercio. Sanchez-Brea is currently contracted by the Universidad Complutense de Madrid under the “Ramón y Cajal” research program of the Ministerio de Educación y Ciencia of Spain.The Talbot effect is analyzed when steel tape gratings are used. These gratings are made on a steel substrate, and, because of the manufacture process, both levels of the grating are rough with different roughness parameters. A theoretical analysis based on Fresnel regime, which considers the statistical properties of roughness, is developed. Analytical formulas that show a decreasing exponential dependence on the intensity in terms of the distance between the grating and the observation plane are obtained, and an experimental verification is also performed.engjournal articlehttp://dx.doi.org/10.1364/AO.46.003668http://www.opticsinfobase.orgopen access535OpticsÓptica (Física)2209.19 Óptica Física