A reflector includes one closed end, one open end and highly reflecting curving walls. The walls are symmetrical about at least one axis of symmetry. The walls include a first segment and other segments. The first segment has a curved shape and is located at the closed end of the reflector. The first...http://www.google.fr/patents/US5934779?utm_source=gb-gplus-shareBrevet US5934779 - Reflector and a reflector/light source system
