Patent ID: 7394200
Filing Date: 2008-07-01
Classification: H01J

Abstract:
1. A high intensity discharge lamp comprising: a) a light emitting vessel having a wall made of ceramic material that defines an inner space with a first end portion having a respective first opening formed therein and a second end portion having a respective second opening formed therein; b) two discharge electrodes, with a first electrode extending with clearance through the first opening of the first end portion of the vessel and a second electrode extending with clearance through the second opening of the second end portion of the vessel, together forming a gap between ends of the discharge electrodes positioned within the vessel; c) first and second tubular legs, each leg comprising a proximal end sealed around a respective one of the openings; d) wherein the light emitting vessel defines an inner space characterized by an inner diameter ranging from and including 1 millimeters to 3 millimeters and an inner length between and including 5 millimeters to 10 millimeters; e) wherein the wall of the vessel has a thickness ranging between and including 0.3 millimeters to 0.8 millimeters; f) wherein each tip of the electrodes within the vessel have a shank diameter ranging between and including 0.2 millimeters to 0.55 millimeters; g) wherein a distance of the gap between the ends of the electrodes positioned within the vessel is less than 4 millimeters; and h) wherein the wall thickness is determined by an inverse relationship with the inner diameter of the vessel.