Quadrifocal diffractive lenses based on the aperiodic silver mean sequence Adrián Garmendía-Martínez, Walter D. Furlan, Juan C. Castro-Palacio, Juan A. Monsoriu and Vicente Ferrando Eur. Phys. J. D, 77 7 (2023) 132 Published online: 10 July 2023 DOI: 10.1140/epjd/s10053-023-00715-4