Apparatus and method for improved illumination area fill

Details Apparatus and method for improved illumination area fill Apparatus and method for improved illumination area fill

2007-02-06

2007-02-06

O'Shea, Sandra (Department: 2875)

Illumination

Light modifier

Reflector

C362S347000, C362S327000, C362S296040, C313S113000, C359S726000

Reexamination Certificate

active

11093988

ABSTRACT:
A reflector for a light source, such as an LED, is provided with a shape which efficiently collects and directs energy to an illumined surface whereby almost 100% of the light is collected and distributed into a designer composite beam. The shape in one embodiment is comprised of three zones beginning with a parabolic surface of revolution at the base of the reflector, followed by a transition or straight conic zone and ending with an elliptical zone. In another embodiment the reflector shape is determined according to a transfer function which allows for arbitrary designer control of the reflected rays at each point on the reflector, which when combined with direct radiation from the source, results in a designer controlled composite beam or illumination. The device is more than 90% energy efficient and allows replacement of higher power, less energy efficient light sources with no loss in illumination intensity.

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