Patent ID: 7545087

Claim:
Light source device, comprising: a housing in which a light exit opening is formed; a light source lamp which is located in said housing; reflectors which are located in said housing and which are positioned to project light emitted from the light source lamp out of the housing via the light exit opening; and a transparent window component which is arranged to close the light exit opening relative to the exterior of the housing; and means for directing a flow of cooling air for cooling the light source lamp and the reflectors through the housing; wherein the light source lamp has a bulb with an arc tube in which there is a pair of opposed electrodes, and which has hermetically sealed tubes extending from opposite ends of the arc tube, lead pins being electrically connected to the electrodes and projecting from outer ends of the hermetically sealed tubes, wherein only a one of the hermetically sealed tubes located away from the light exit direction is supported by the housing with a tube axis of the bulb extending in the light exit direction, wherein a cooling rib is provided on a one of the lead pins which is directed toward the light exit opening, the cooling rib having a larger dimension in a radial direction than a maximum diameter of an outer edge of the light exit opening in the housing, and wherein the minimum distance between an outer edge area of the cooling rib in a region thereof which is faces the light exit opening and the inside of the window component is greater than the minimum distance between the outer edge area of the cooling rib and the inside surface of the housing such that, in the case of contact with an inside wall of the housing by an outer edge area of the cooling rib which faces a peripheral edge area of the light exit opening, neither the cooling rib nor the lead pin on which it is mounted will contact with the window component.