Optics: image projectors – Composite projected image – Multicolor picture
Reexamination Certificate
2005-05-31
2005-05-31
Dowling, William (Department: 2851)
Optics: image projectors
Composite projected image
Multicolor picture
C359S634000
Reexamination Certificate
active
06899430
ABSTRACT:
A system for separating light into different spectrums and for recombining the light includes at least one polarizing beamsplitter and at least one retarder stack configured to condition the polarization of input light differently for different spectrums. A device embodying the invention could utilize multiple polarizing beamsplitters and multiple retarder stacks. Alternatively, a system could utilize a single polarizing beamsplitter and a single retarder stack in combination with one or more dichroic beamsplitters. In preferred embodiments, one or more reflective modulator panels are included to separately modulate each separated spectrum of light. Such an embodiment can be used for a color projection system. In each of the embodiments that utilize modulators, distances between the modulators and the focusing optics is essentially the same.
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Bi
Johnson Kristina M.
Sharp Gary D.
Baker & McKenzie
ColorLink, Inc.
Dowling William
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