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AssigneeColorLink, Inc.
InventorsJianmin Chen, Michael G. Robinson, Gary D. Sharp, Jonathan R. Birge
Estimating the term…
Beamsplitters are used in projectors with retarder stack filters to orthogonally polarize primary colors, converting polarizing beamsplitters to color splitters and combiners. Geometric polarization rotations induced by beamsplitters at moderate f-numbers significantly degrading performance. Because retarder stacks may rely on a specific input polarization to perform properly, such skew rays result in color cross-talk. Retarder stacks according to the present invention are sensitive to the symmetries between input and output polarizer configurations. These stacks provide the polarization transformations that will compensate for skew rays, such that normal incidence performance is maintained for all incident light. Additionally, systems that utilize color selective polarization filters (CSP) and polarizing beam splitting elements such that an output analyzer is not required are disclosed. The CSP may be included in the above system. One exemplary CPS architecture includes two CSPs, a single polarizing beam splitting element combination for splitting and combining light between two of the three panels, and an output polarizing beam splitting element used as an analyzer such that a single CSP in the projection path. A second architecture uses an output combining chromatic polarizing beam splitting. A third architecture uses chromatic sheet polarizers to enhance CSP performance. In all of the architectures, an output CSP and clean up polarizer directly in front of the projection optics need not be included, thereby increasing transmission, improving imaging crispness by increasing the optical phase flatness of the projected light, and reducing cost.
An optical filter comprising:
An optical filter comprising:
An optical filtering method, the steps of the method comprising:
An optical filter method, the steps of the method comprising:
An optical arrangement comprising:
A method of filtering light, the steps of the method comprising:
An optical arrangement comprising:
A method of filtering light, the steps of the method comprising:
A color management architecture comprising:
A method of providing a color management system comprising:
A color management architecture comprising:
A display architecture comprising:
A display architecture comprising:
A display architecture comprising:
A method of projecting light comprising:
Dependencies are inferred from the claim text.