Patent ID: 8714782

Claim:
A nonimaging light assembly, comprising: a light source; and a lens symmetrical about an optical axis, including a first rear surface intersecting said optical axis for receiving a first portion of light emanating from said light source positioned along said optical axis, a second rear surface extending about said first rear surface for receiving a second portion of light emanating from said light source, a side surface for total-internally reflecting and substantially collimating light received by said second rear surface, and a front surface for exiting light reflected from said side surface and light received by said first rear surface; said lens having an axisymmetric profile substantially described by sample points thereon defined by x,y-coordinate pairs set forth in FIGS. 27 a , 27 b , 27 c and 27 d , incorporated herein by reference, where x represents position along an x-coordinate along said optical axis and y represents position along a y-coordinate radially from said optical axis, the x and y positions of said sample points subject however to reasonable tolerances, for exiting at said front surface a composite light beam comprising a first light component diverging from said optical axis produced from light received by said first rear surface combined with a concentrated substantially collimated second light component resulting in a core beam surrounded by a smoothly transitioning lower intensity surround beam.