Freeform design of a two-reflector system to collimate and shape a point source distribution A.H. van Roosmalen, M.J.H. Anthonissen, W.L. IJzerman and J.H.M. ten Thije Boonkkamp EPJ Web Conf., 255 (2021) 02002 Published online: 18 November 2021 DOI: 10.1051/epjconf/202125502002