Lens for light emitting diodes mounted on a heat sink

Details Lens for light emitting diodes mounted on a heat sink Lens for light emitting diodes mounted on a heat sink

2009-04-08

2009-12-15

Lester, Evelyn A. (Department: 2873)

Optical: systems and elements

Lens

With field curvature shaping

C359S662000, C359S708000, C359S718000, C359S720000, C359S724000, C359S737000, C359S743000

Reexamination Certificate

active

07633684

ABSTRACT:
A lens particularly suited to elongated grooved lens holders such as heat sinks for light emitting diodes. The lens may have a curved surface which projects light in rectangular beams and a radial flange for engaging grooves of a grooved lens holder. Curvature is that of a flattened or compressed sine wave, with less than one full wave being formed along the lens. In one aspect of the invention, the crest of the wave, which would ordinarily be domed, may be flat. The radial flange has straight sides to enable contiguity when arrayed in abutment as well as for cooperating with the grooves of the lens holder.

REFERENCES:
patent: 4099848 (1978-07-01), Osakabe
patent: 4963008 (1990-10-01), Fujimura
patent: 5966250 (1999-10-01), Shimizu
patent: 5995303 (1999-11-01), Honguh et al.
patent: 6970291 (2005-11-01), Kamon
patent: 2007/0273983 (2007-11-01), Hebert
patent: 2009/0032595 (2009-02-01), Oliva et al.

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