Illumination systems

Details Illumination systems Illumination systems

2011-05-17

2011-05-17

Shafer, Ricky D (Department: 2872)

Optical: systems and elements

Polarization without modulation

Polarization by reflection or refraction

C359S487040, C359S487050, C359S489070, C359S489150, C359S900000, C362S019000, C362S800000

Reexamination Certificate

active

07944612

ABSTRACT:
Described are illumination systems whereby light spectra from multiple LEDs of various colors can be combined and polarized with minimal components, while substantially reducing the losses for the combining and polarizing. The described systems and methods use polarizing beam splitters (PBSs) with retarder stack filters to combine color and split polarization for mixed light beams in one step, and to ultimately align the polarizations of the several colored light beams.

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