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US 8,506,132 B2Granted
Method and apparatus for creating high efficiency radial circular lighting distributions from a hemispherical lambertian source
AssigneeDragonfish Technologies, LLC
InventorMark Bryan Pruss
Life of this patent
Estimating the term…
Abstract
A ring generating LED lamp includes a lens section which employs internal reflection to direct the light energy from a hemispherical emitter into a ring shaped output distribution. The ring shaped distribution projects above and below the plane of the LED source. The lens has multiple internal surfaces that direct light from the LED source to provide a ring shaped output distribution.
Claims17
A lamp comprising:
- a central axis;
- a hemispherical light emitter;
- and
- a lens associated with the hemispherical light emitter and shaped to direct light emitted by the hemispherical light emitter into a ring shaped output distribution, wherein the lens has a first surface to direct light from the light emitter toward a second internally reflective surface configured to reflect and redirect substantially all of the light emitted by the hemispherical light emitter onto a third refractive surface comprising a plurality of facets having progressively smaller radii as the facets approach the plane of the hemispherical light emitter, wherein the third refractive surface refracts light out of the lens in the ring shaped output distribution projecting both above and below a plane orthogonal to the central axis.
1 more element
A lens comprising:
- a central axis;
- a first flat surface that refracts light incident thereon along a first non-collimated light path;
- a second curved surface positioned relative to the first flat surface to receive light along the first light path and internally reflect substantially all of the light along a second light path;
- and
- a third outer surface positioned relative to the second flat surface to receive light along the second light path and redirect the light along a third light path that is generally perpendicular to the central axis and projects outwardly in a ring shaped distribution above and below a plane perpendicular to the central axis.
2 more elements
A marine lamp comprising:
- a central axis;
- a hemispherical light emitter;
- and
- a lens associated with the hemispherical light emitter having a first surface to direct light from the hemispherical light emitter toward a second internally reflective surface configured to reflect and redirect substantially all of the light emitted by the hemispherical light emitter toward a third refractive surface comprising a plurality of facets having progressively smaller radii as the facets approach the plane of the hemispherical light emitter, and wherein the third refractive surface refracts light out of the lens into a ring shaped output distribution projecting within about +/−10 degrees above and below a plane orthogonal to the central axis.
1 more element
Dependencies are inferred from the claim text.