Patent ID: 7866855

Claim:
A reflector for a luminaire comprising a shaped wall having a plurality of longitudinal main reflecting prisms circumferentially arranged on said shaped wall in a dome-like configuration and extending substantially the height of said shaped wall, each of said main reflecting prisms having a peak with a predetermined curvature in a cross section passing through a longitudinal axis of said shaped wall and positioned between two valleys to provide a light reflection pattern, and a plurality of transition reflecting prisms interleaved with said main reflecting prisms, each of said transition reflecting prisms having a peak between two valleys with substantially said predetermined curvature in a first region of said reflector comprising a major part of said shaped wall to provide said light reflection pattern, the peak of each transition prism transitioning into the valley of a respective main prism in a second region of said reflector forming a transition zone that is shorter than said first region, and said main reflecting prisms also forming a third region of said reflector without interleaved transition prisms.