Light source for projector and projection type image display...

Details Light source for projector and projection type image display... Light source for projector and projection type image display...

2005-03-08

2005-03-08

Husar, Stephen F (Department: 2875)

Illumination

Light source and modifier

Ionized gas or vapor light source

C362S294000, C362S346000, C362S518000

Reexamination Certificate

active

06863418

ABSTRACT:
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.

REFERENCES:
patent: 4555748 (1985-11-01), Bradley
patent: 5947590 (1999-09-01), Meuse et al.
patent: 5985465 (1999-11-01), Daichou et al.
patent: 6509674 (2003-01-01), Nakagawa
patent: 2001-290218 (2001-10-01), None

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