Patent ID: 9470406
Filing Date: 2016-10-18
CPC Classification: F21S,F21V,F21Y,H01L,H05B

Claim Text:
1. A light source producing a beam of variable divergence, comprising: a plurality of light-emitting devices arranged on a plane; a concave reflecting optic having an axis of symmetry and comprising a plurality of segments, each having an aiming angle with respect to the axis of symmetry, for redirecting light emitted thereon, light emitted by the light-emitting devices and reflected by the optic forming a light beam; and driver circuitry for controlling drive currents to the light-emitting devices individually or in groups thereof to thereby variably control a divergence of the light beam; wherein at least some of the segments have different aiming angles depending on their distances from the plane of the light-emitting devices; wherein the aiming angle of each segment with respect to the axis of symmetry increases gradually as the distance between the segment and the plane of the light-emitting devices decrease; and wherein the reflecting optic comprises first and second edge segments having a shortest distance and a longest distance, respectively, from the plane of the light-emitting devices, the first edge segment having a first aiming angle approximately equal to a desired divergence angle of the light beam and the second edge segment having a second aiming angle approximately parallel to the axis of symmetry for collimating the light beam.