Probing canonical geometrical objects by digital spiral imagingGabriel Molina-Terriza, Liis Rebane, Juan P. Torres, Lluis Torner and Silvia CarrascoJ. Eur. Opt. Soc.-Rapid Publ., 2 (2007) 07014DOI: https://doi.org/10.2971/jeos.2007.07014