Patent ID: 7172319
Filing Date: 2007-02-06
Classification: F21K,F21V,F21Y,G02B,H01L

Abstract:
1. An apparatus for illuminating a surface comprising: a light source whose intensity varies as a function of the angles of the light rays radiated form the light source in a three dimensional radiation pattern, and a reflector having an optical aperture, the reflector being proximate to the light source, defining a system angle by the optical aperture of the reflector and allowing directly radiated energy to propagate from the light source through the optical aperture of the reflector to the surface to provide a directly radiated energy distribution pattern on the surface, where the reflector has a defined shape derived from a transfer function, which has as inputs: the three dimensional radiation pattern of the light source; beam parameters, including light source-to-surface distance and beam diameter; system parameters of the reflector including reflector size and optical aperture size of the reflector; and a desired composite energy distribution on the surface; and which has as outputs; an amount of directly radiated energy propagating through the optical aperture of the reflector; a remainder of the total available radiated energy from the light source less the energy of the light directly radiating to the surface through the reflector optical aperture; and a calculated position and orientation of each point on the reflector as a function of angle needed to provided the desired composite energy distribution on the 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 designer controlled composite energy distribution on the surface.