Patent ID: 7828461
Filing Date: 2010-11-09
Classification: F21S,F21V,F21W,F21Y

Abstract:
1. A luminaire comprising: a first plurality of LEDs mounted on a support facing a target plane; a second plurality of LEDs mounted on the support facing the target plane; and at least one reflector fixed with respect to the support, the at least one reflector including a first reflective surface of revolution with respect to a line intersecting a fixed point cooperating with each of the first LEDs and a second reflective surface of revolution with respect to the line intersecting the fixed point cooperating with each of the second LEDs, the reflective surfaces being configured to direct light emitted from the respective LEDs toward the target plane forming a first and second generallv annular beam pattern, wherein a peak of luminous intensity of light from the first plurality of LEDs is at a first angle of incidence and a peak of luminous intensity of light from the second plurality of LEDs is at a second angle of incidence, which is less than said first angle, and wherein said second anle of incidence is a function of overlap of the first generally annular beam pattern on the second annular beam pattern and a height at which the LEDs reside over the plane to a combined beam pattern including the first generally annular beam pattern and the second generally annular beam pattern having a generally uniform illumination cross at least a majority of the combined beam pattern on the tagret plane.