Patent ID: 6336734
Filing Date: 2002-01-08
Classification: F21S,F21V,F21W

Abstract:
A luminaire lens assembly comprising:a top lens having an external reflecting area; and a bottom lens including an internal refracting area having plurality of concentric prismatic areas, and an external refracting area, said external refracting area comprising a plurality of concentric prisms, each prism including a first prism wall and a second prism wall, whereby said first prism wall defines an angle A to the central axis Xc of said luminaire lens assembly and said second prism wall defines an angle B to the central axis Xc of said luminaire lens assembly and the relationship between angle A to x is A=0.0114x2âˆ’0.1071x+3.5158 and the relationship between angle B to x is B=âˆ’0.0012x2âˆ’0.4468x+69.458 and x is the prism number from the perimeter of the bottom lens.