Patent ID: 7775690

Claim:
A reflector structure for directing radiation from an axial beam tube toward a work surface comprising: a channel housing with outer and inner walls and with a length having a cross-sectional open face towards a work surface and having a plurality of spaced apart ribs supported within the inner wall of the channel housing with a cross-sectional open face of each of the ribs aligned with the open face of the channel housing along its length; a plurality of shiny spars disposed along the length of the inner walls of the channel housing supported by the ribs forming a plenum wherein a high power lamp tube is mounted, the spars forming an optical reflector for the lamp tube with a gap between two adjacent spars, with the spars and inner channel wall defining a gas flow tunnel outside of the plenum; an auxiliary deflector spar located behind the plurality of shiny spars between the gap and the inner wall of the channel housing within the gas flow tunnel partially obstructing the gap between the shiny spars; and means for pressurizing the tunnel with a coolant gas in a manner causing gas flow against the auxiliary spar and through the partially obstructed gap creating a tortuous flow path into the plenum between the high power lamp tube and the shiny spars thereby cooling the lamp tube and the shiny spars.