An optical integrating cavity supplies light or other radiant energy through a port to a deflector. The deflector coupled to the port may form a "fan" extending along one side or around all or part of the circumference of the cavity. Preferred embodiments use principles of constructive occlusion (diffuse...http://www.google.de/patents/US6286979?utm_source=gb-gplus-sharePatent US6286979 - Constructive occlusion lighting system with ported cavity and fan structure
