In this final design report the general layout and the optics of the beamline ROBL is described. The beamline is build by the research center Rossendorf at the bending magnet source BM20 of the European synchrotron radiation facility (ESRF), Grenoble. The design criteria for the beamline optics and the adopted solutions are reported in detail. Some performance data of the beamline as resolution, focussing and intensity are modelled by the ray-tracing code SHADOW. Furthermore the layout of the vacuum system is described. (orig.)Available from FIZ Karlsruhe / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEDEGerman