Diffractive elements for correction of chromatic aberrations of illumination systems Marek Škereň, Jakub Svoboda, Milan Květoň, Jaroslav Hopp, Martin Possolt and Pavel Fiala EPJ Web of Conferences, 48 (2013) 00025 Published online: 03 May 2013 DOI: 10.1051/epjconf/20134800025