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`ATTORNEY DOCKET NO: 229501
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`ABSTRACT
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`A polarization conversion system (PCS) is located in the output light path of a projector.
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`The PCS may include a polarizing beam splitter, a polarization rotating element, a
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`reflecting element, and a polarization switch. Typically, a projector outputs randomly-
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`polarized light. This light is input to the PCS, in which the PCS separates p-polarized
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`light and s-polarized light at the polarizing beam splitter. P-polarized light is directed
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`toward the polarization switch on a first path. The s-polarized light is passed on a second
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`path through the polarization rotating element
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`(e. g., a half-wave plate),
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`thereby
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`transforming it
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`to p-polarized light. A reflecting element directs the transformed
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`polarized light (now p-polarized) along the second path toward the polarization switch.
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`The first and second light paths are ultimately directed toward a projection screen to
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`collectively form a brighter screen image in cinematic applications utilizing polarized
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`light for three-dimensional Viewing.
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`16
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