A reflector of a lighting apparatus such as a flashlight has a cupped body with a first pair of opposing walls and a second pair of opposing walls extending from an aperture at the cupped body center to a rectangular opening. The internal surfaces of the walls are reflective. Each of the first pair of...http://www.google.de/patents/US6048084?utm_source=gb-gplus-sharePatent US6048084 - Illumination reflector for area projection
