Illumination system

Details Illumination system Illumination system

2005-12-02

2010-02-09

Husar, Stephen F (Department: 2885)

Illumination

Light fiber, rod, or pipe

Light emitting diode

C362S558000, C362S318000, C359S665000

Reexamination Certificate

active

07658528

ABSTRACT:
An illumination system has a plurality of light emitters (R5G5B), a first light-collimator (1) for collimating light emitted by the light emitters, and at least a second light-collimator (2) for collimating light emitted by the light emitters. The first light-collimator is arranged around a longitudinal axis (25) of the illumination system, and second light-collimator is being arranged around the first light-collimator along the longitudinal axis. Light propagation in the first light-collimator on total internal reflection. Light propagation in the second light-collimator is based on total internal reflection or on reflection at an outer surface of the second light-collimator facing away from the longitudinal axis. The cavity (3) is provided between the first and the second light-collimator. The cavity is provided with a switchable element based on electrowetting, wherein the switchable optical element is switchable in a mode of operation reducing the effect of the second light-collimator.

REFERENCES:
patent: 5345337 (1994-09-01), Sigler
patent: 5348486 (1994-09-01), Tura et al.
patent: 6288846 (2001-09-01), Stoner, Jr.
patent: 6473543 (2002-10-01), Bartels
patent: 7230771 (2007-06-01), Kuiper et al.

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