Arrangement for polarization of light

Details Arrangement for polarization of light Arrangement for polarization of light

2006-05-23

2006-05-23

Quach-Lee, Y. My (Department: 2875)

Illumination

With polarizer

C353S020000, C349S009000

Reexamination Certificate

active

07048396

ABSTRACT:
The invention is directed to an arrangement for the polarization of light, preferably for use in projectors. It comprises at least one illumination source, an integrator with a structural component part which is arranged in the light entrance plane, has the entrance opening, and is constructed so as to be reflecting in the direction of the interior of the integrator, as well as components for the polarization and reflection of partial beams of the light bundle entering the integrator. According to the invention, at least two reflecting polarizers are arranged in the light exit plane of the integrator in the same angular position relative to the axis of the integrator. The polarizers have polarization directions that are rotated relative to one another. Phase plates which adapt the polarizers with non-transmitted polarization directions to the polarizers with transmitted polarization directions are provided outside of the integrator.

REFERENCES:
patent: 6243149 (2001-06-01), Swanson et al.
patent: 6373629 (2002-04-01), Yamagishi et al.
patent: 6739723 (2004-05-01), Haven et al.
patent: 6793341 (2004-09-01), Svardal et al.
patent: 2001/0033418 (2001-10-01), Hayashi

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