Light source in the form of an arc lamp, a sealed beam light source, a light source including a reflector and a mounting means
AssigneeDigital Projection Limited
InventorMartin Kavanagh
Life of this patent
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Abstract
An arc lamp suitable for use as a high intensity light source in a projection system is described. A reflector is arranged to reflect the light produced by the arc into a directional light beam, secondary reflection means being arranged to direct part of the reflected beam so as to compensate for regions which are obscured by the electrodes. Means are provided within the light source to dissipate heat generated by the electrodes.
Claims11
A light source in the form of a sealed beam arc lamp comprising a cathode and an anode defining between them an arc gap, and a reflector, said anode and cathode being arranged within the reflector, said reflector being formed on the surface of a metallic heat conductive mounting, and one of the cathode and the anode being thermally connected to the heat conductive mounting.
A light source in the form of a sealed beam arc lamp comprising an anode and a cathode, and a reflector forming at least part of the enclosure for the arc lamp wherein at least one of said cathode and said anode is fabricated from tungsten at its active surface in thermal contact with a heat conductive material comprising at least one of copper and silver forming a heat conductive path from the active surface and extending substantially along the length of said one cathode or anode.
Dependencies are inferred from the claim text.