Led light collection and uniform transmission system using a...

Details Led light collection and uniform transmission system using a... Led light collection and uniform transmission system using a...

2006-10-24

2006-10-24

O'Shea, Sandra (Department: 2875)

Illumination

Light emitting diode

C362S545000, C362S555000, C362S328000, C362S309000

Reexamination Certificate

active

07125160

ABSTRACT:
Apparatus for collecting light from an LED and transmitting it in a near-uniform column incudes a conical reflector having a roughed up inner surface about the base of the LED for collecting light emitted to the sides of the LED, and a lens specially designed to focus the collected light into a near-collimated beam. The lens has opposite, substantially elliptical surfaces to collect and collimate the rapidly diverging light from the LED and the reflector, and each lens surface includes a flat spot to prevent shadows from forming, thereby producing a more uniform beam.

REFERENCES:
patent: 4327972 (1982-05-01), Brunsting
patent: 5174649 (1992-12-01), Alston
patent: 6019493 (2000-02-01), Kuo et al.

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