Patent ID: 7492082

Claim:
A light source apparatus comprising: a discharge lamp including: a discharge container; sealing portions continuously formed from both ends of the discharge container respectively; and a concave reflection mirror disposed so as to surround the discharge container, wherein the concave reflection mirror has a spheroidal surface or paraboloid of revolution formed from a front opening edge thereof, a cylindrical head section is provided in the concave reflection mirror and extends in an tube axis direction of the discharge lamp, a sealing portion receiving section is formed in the head section of the concave reflection mirror, in which an end of one of the sealing portions is received, the one of the sealing portions is received in the sealing portion receiving section so as not to project from an end of the sealing portion receiving section, the sealing portion receiving section has an internal surface whose diameter is approximately the same as an outer diameter of the one of the sealing portions, and an inner bottom surface, which is continuously formed from the internal surface, an end surface of an end portion of the one of the sealing portions and the inner bottom surface of the sealing portion receiving section are brought into close contact with each other, and an outer surface of the one of the sealing portion and the internal surface of the sealing portion receiving section are brought into close contact with each other, so that an emission center and an optical axis of the discharge lamp conform with a focal point and the optical axis of the concave reflection mirror.