Microlenses with annular amplitude and phase masks V. Paeder, T. Scharf, P. Ruffieux, H.–P. Herzig, R. Voelkel and K. J. Weible J. Eur. Opt. Soc.-Rapid Publ., 2 (2007) 07005 Published online: 23 January 2007 DOI: 10.2971/jeos.2007.07005