Illumination – Light modifier – Refractor
Reexamination Certificate
2007-04-03
2007-04-03
Tso, Laura K. (Department: 2875)
Illumination
Light modifier
Refractor
C362S327000, C362S310000, C362S296040, C428S426000, C501S011000, C501S064000
Reexamination Certificate
active
10920351
ABSTRACT:
It is an object of the present invention to provide a reflector made of heat-resistant glass. It is another object of the present invention to provide a projective display which uses the reflector.A projector device having: a light source emitting white light; a reflector reflecting a light emitted from the light source; a light valve modulating illumination beam of light; and a projective lens projecting image light from the light valve, wherein the reflector is made of a glass containing SiO2as a major ingredient and at least one rare-earth element selected from the group consisting of Sc, Y, La, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu, and the glass has a thermal expansion coefficient lower than 40×10−7/° C. and a transition temperature higher than 500° C.
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Akata Hiroyuki
Deguchi Masaharu
Hirata Koji
Miyata Motoyuki
Naitou Takashi
Antonelli, Terry Stout and Kraus, LLP.
Hitachi , Ltd.
Tso Laura K.
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