Cooling system for xenon arc lamps

Claim 1

In a lamp cooling system, the combination of: a cabinet; a generally ellipsoidal mirror having an axis and mounted within said cabinet; an elongate lamp having a lamp housing with first and second seals, said lamp having first and second in-line terminals entering the lamp housing at the first and second seals, respectively, with the lamp positioned within said mirror along said axis with said first seal and terminal in front of said mirror; a sleeve positioned about said lamp at said first seal substantially concentric with said axis and defining an annular air flow passage between said seal and sleeve, with said sleeve substantially closed at one end; a radially positioned supply duct coupled to said sleeve between said first seal and one end; means for supplying air under pressure to said supply duct for flow into said sleeve and through said annular passage about said first seal; a second sleeve positioned about said one sleeve and extending along said lamp beyond said first seal and terminating short of the source of light within said lamp housing; and baffle means engaging said sleeves defining a manifold therebetween; said supply duct being connected to said second sleeve at said manifold, and said one sleeve having passage means for air flow from said manifold into said one sleeve.