Provided is a projector light source which can effectively project a light
beam having a sufficient volume from a lamp as a light source, and which
is highly accurate and is excellent in workability. The projector light
source comprising an arc tube for emitting a light beam; and a concave
reflector including a hold part for holding the arc tube, and having a
concave reflection surface for reflecting the light beam from the arc tube
so that the light beam outgoes through an opening of the reflector, the
concave reflector comprising a first reflector located in the vicinity of
the hold part for holding the light emitting tube, and second reflector
located in a part other than the hold part, and made of a material
different from that of the first reflector. Further, the first reflector
is made of heat-resistant glass, and the second reflector is made a
material containing a heat-resistant organic material having a thermal
deformation temperature which is lower than that of the heat-resistant
glass.
