Analysis, optimization and implementation of a variable retardance based polarimeter A. Peinado, A. Lizana, J. Vidal, C. Iemmi, A. Márquez, I. Moreno and J. Campos EPJ Web of Conferences, 5 (2010) 06008 Published online: 02 June 2010 DOI: 10.1051/epjconf/20100506008