1. ABSTRACTA system has been developed that makes it possible to design headlamps having an ideal light distribution pattern. Using multi B-spline surfaces (MBSS) for the reflector and dual filament (c-8/c-8) for the light source, the shape and the light distribution pattern it generates are computer simulated. The characteristics of the light distribution are analyzed and, using a neural network, the reflector is partitioned. Each surface is continuously modified so as to obtain the optimum light distribution pattern.