Optics: image projectors – Polarizer or interference filter
Reexamination Certificate
2005-06-14
2005-06-14
Nguyen, Judy (Department: 2851)
Optics: image projectors
Polarizer or interference filter
C353S081000, C353S033000, C359S490020, C359S490020, C359S490020
Reexamination Certificate
active
06905211
ABSTRACT:
A color separation device according to the present invention comprises a first color separation member having a first polarization direction changing element and a second polarization direction changing element, and a first polarization separation element, and a second color separation member having a second polarization separation element. The first color separation member may be configured from a color separation function element and a polarization direction changing element. Linearly polarized light being made incident on the first color separation member at an angle of approximately 45 degrees so as to separate the light into reflected light and transmitted light, both lights having different colors and one of the different colors corresponding to one of three colors, and one of the lights being made incident on the second color separation member so as to separate the one of the lights into further reflected light and further transmitted light, both further reflected light and further transmitted light corresponding to the other two of the three colors, respectively.
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Fujita Kazuhiro
Yamauchi Satoshi
Nguyen Judy
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
Ricoh & Company, Ltd.
Sever Andrew
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