The systems and methods disclosed herein relate to sources of diffuse illumination for providing substantially uniform illumination to a surface. The diffuse illumination arises from varying the diffusion angle of light generated by an LED system. To vary the diffusion angle, a translucent member is...http://www.google.es/patents/US7352339?utm_source=gb-gplus-sharePatente US7352339 - Diffuse illumination systems and methods
