Patent ID: 7488091

Claim:
A projector comprising: a lamp unit comprising a lamp body for emitting light and a lamp holder for holding the lamp body; and an image projection unit which comprises a color wheel for coloring light, emitted from the lamp unit, with a predetermined color, and which is provided for projecting images using the light emitted from the lamp unit and passing through the color wheel, wherein the lamp holder comprises: a resin cover member being made of resin and having an open space portion at a place where the light emitted from the lamp body is irradiated sufficiently strongly to produce out-gassing from the resin cover member of the lamp holder; a cover plate which is made of metal and has a projection window of the cover plate for the light emitted from the lamp body to pass through, and which is fixed to the resin cover member for covering the open space portion of the resin cover member irradiated sufficiently strongly by the lamp, thus preventing the out-gassing; a cover glass for the light emitted from the lamp body to pass through when the light enters the image projection unit; and a holding plate being fixed to the cover plate and having a projection window of the holding plate, wherein the cover glass is sandwiched between a part of the holding plate around the projection window of the holding plate and a part of the cover plate around the projection window of the cover plate so as to be held at a predetermined position, and wherein the cover plate is made of zinc-plated low carbon steel.