Patent ID: 7503662

Claim:
A light source device, comprising: a light-emitting tube including a light-emitting portion that emits a light beam through electrodes and a pair of sealing portions provided on both sides of the light-emitting portion and lead wires for making electrical continuity between the electrodes and an external power source, the lead wires extending from distal ends of the sealing portions, respectively; and a reflector having a concave reflecting surface that irradiates, from an opening thereof, the light beam emitted by the light-emitting tube after being aligned in a predetermined direction, wherein the light-emitting tube is provided such that one of the pair of sealing portions projects toward the light beam irradiation front side of the reflector, and a one of the lead wires extending from one of the sealing portions extends up to an edge portion of an opening of the reflector located on a side from which the light beam is irradiated, the lead wire having a fold-down portion in which the lead wire extending up to the edge portion of the reflector is bent in accordance with a shape of the edge portion so as to sandwich the edge portion in a thickness direction thereof and thereby fix the lead wire to the reflector.