Berens, M.M.BerensBruneton, A.A.BrunetonBäuerle, A.A.BäuerleTraub, M.M.TraubWester, R.R.WesterStollenwerk, J.J.StollenwerkLoosen, P.P.Loosen2022-03-122022-03-122013https://publica.fraunhofer.de/handle/publica/38119410.1117/12.2026516We report on an extension of the previously published two-step freeform optics tailoring algorithm using a Monge-Kantorovich mass transportation framework. The algorithm's ability to design multiple freeform surfaces allows for the inclusion of multiple distinct light paths and hence the implementation of multiple lighting functions in a single optical element. We demonstrate the procedure in the context of automotive lighting, in which a fog lamp and a daytime running lamp are integrated in a single optical element illuminated by two distinct groups of LEDs.en621conference paper