Patent ID: 7195388

Claim:
A projector apparatus comprising: a light source device which includes: (i) a light source lamp, (ii) a reflector in which the light source lamp is at least partially arranged, which has an opening through which light from the light source lamp is emitted, and which reflects light radiated from the light source lamp through the opening, and (iii) a transparent explosion-proof glass having a predetermined thickness, which is arranged ahead of the opening of the reflector, and which is obliquely inclined by a predetermined angle with respect to a plane perpendicular to an optical axis of the light emitted from the reflector; a display element which displays an image by controlling emission of received light; an optical system which causes light emitted from the light source device to be incident to the display element, and which comprises a light guiding rod which has: (i) a light entering area, at a first end of the rod, at which light enters the rod, (ii) a light emitting area, at a second end of the rod, from which light that enters the rod at the light entering area is emitted, and (iii) a center axis which coincides with an optical axis of light emitted from the explosion-proof glass, wherein the optical axis of the light emitted from the explosion-proof glass does not coincide with the optical axis of the light emitted from the reflector; and a projection lens which projects light emitted from the display element to a projection surface.