Patent ID: 7581855
Filing Date: 2009-09-01
Classification: F21K,F21V,F21Y,G02B,H01L

Abstract:
1. A method for illuminating a surface comprising: providing a reflector having an aperture and a shape defined by a three dimensional reflector surface; radiating light from a light source whose intensity varies as a function of the angles of the light rays radiated from the light source in a three dimensional radiation pattern, and reflecting light from the reflector, the reflector being proximate to the light source, defining a system angle by its aperture and allowing directly radiated energy to propagate from the light source through the aperture of the reflector to the surface to provide a directly radiated energy distribution pattern on the surface to be illuminated defined as the illuminated surface, where providing the reflector comprises defining the shape derived from a transfer function, which has as inputs: and which has as outputs: a calculated position and orientation of each point on the reflector as a function of angle needed to provide the user selected composite energy distribution on the illuminated surface, which calculation defines the shape of the reflector necessary to provide a reflected energy pattern to overlay the directly radiated energy pattern to form the user selected composite energy distribution on the illuminated surface.