Light source unit, illumination optical device, projector, and method of manufacturing light source unit

摘要

Exemplary embodiments of the present invention include a light source unit in which lowering of an illumination intensity of an emitted luminous flux is reduced or prevented. A light source lamp unit includes a light source lamp having a light emitting section in which discharging emission is performed between electrodes, an elliptic reflector to emit a luminous flux radiated from the light source lamp in a certain uniform direction, and a secondary reflecting mirror provided on the opposite side of the light source lamp opposite from the elliptic reflector. A center of light emission C 2 between the electrodes does not match a first focal point F 1 of the elliptic reflector, a center of the source of reflected light C 1 of the secondary reflecting mirror does not match the first focal point F 1 of the elliptic reflector. The center of light emission C 2 , the first focal point F 1 , and the center of the source of reflected light C 1 are disposed on a straight line perpendicular to a straight line connecting the first focal point F 1 and a second focal point F 2 of the elliptic reflector.