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US 8,136,967 B2Granted
LED optical lens
AssigneeLumenetix, Inc.
InventorsMatthew Weaver, Yuzuru Takashima
Life of this patent
Estimating the term…
Abstract
An optical lens and method for designing the lens are disclosed. The lens includes a first surface and a second surface. Light emitted from multiple light emitting elements enters the lens through a central section of the first surface. The light can be reflected from a reflective central section of the second surface and/or undergo total internal reflection at an outer ring section of the second surface one or more times before exiting the lens through the outer ring section of the second surface. Upon exiting the lens, the light beam has a predetermined divergence angle and has a fairly uniform color in the far field even if the multiple light emitting elements have different peak wavelengths.
Claims32
An optical lens, comprising:
- a light transmissible body;
- a first surface of the light transmissible body having a first outer ring section and a first central section, wherein the first central section is curved inward, the first outer ring section is reflective, and the first outer ring section is curved towards a second surface;
- the second surface of the light transmissible body having a second outer ring section and a second central section, wherein the second central section has an inwardly tapered notch in the center, the second central section is reflective, the second outer ring section is curved towards the first surface, and an edge of the second surface is coupled to an edge of the first surface;
- wherein the first central section receives light emitted by a plurality of light emitting elements, the plurality of light emitting elements emit at least at different peak wavelengths, and the light exits the lens through the second outer ring section, and further wherein in the far field, the light has a substantially uniform color, and
- further wherein a second curvature of the second outer ring section causes light rays emitted directly from the plurality of light emitting elements that strike the second outer ring to be substantially totally internally reflected back into the optical lens and reflected from the first outer ring section, and a first curvature of the first outer ring section causes light exiting the optical lens to have a predetermined divergence angle with respect to an optical axis of the lens.
2 more elements
A lighting device comprising:
- a plurality of light emitting diodes that emit light having at least two different wavelength peaks;
- an electronics board to provide power to the plurality of light emitting diodes;
- a lens configured to capture the light emitted by the plurality of light emitting diodes, wherein the lens comprises:
- a light transmissible body;
- a first surface of the light transmissible body having a first outer ring section and a first central section, wherein the first central section is curved inward to accommodate the plurality of light emitting diodes, the first outer ring section is reflective, and the first outer ring section is curved towards a second surface;
- the second surface of the light transmissible body having a second outer ring section and a second central section, wherein the second central section has an inwardly tapered notch in the center, the second central section is reflective, the second outer ring section is curved towards the first surface, and an edge of the second surface is coupled to an edge of the first surface;
- wherein the first central section receives light emitted by the plurality of light emitting elements, the second central section and the first outer ring section are coated with a reflective coating at least at wavelengths of light emitted by the plurality of light emitting diodes, and the light exits the lens through the second outer ring section, and further wherein in the far field, the light has a substantially uniform color, and
- further wherein a curvature of the second out ring causes rays emitted directly from the plurality of light emitting elements that strike the second outer ring to be substantially totally internally reflected back into the optical lens and reflected from the first outer ring section, and a first curvature of the first outer ring section causes light exiting the optical lens to have a predetermined divergence angle with respect to an optical axis of the lens.
5 more elements
An optical lens, comprising:
- a first surface having a first outer ring section and a first central section, wherein the first central section is curved inward, the first outer ring section is reflective, and the first outer ring section is curved towards a second surface;
- the second surface having a second outer ring section and a second central section, wherein the second central section has an inwardly tapered notch in the center, the second central section is reflective, the second outer ring section is curved towards the first surface, and an edge of the second surface is coupled to an edge of the first surface,
- wherein the first central section receives light emitted by a plurality of light emitting elements, the plurality of light emitting elements emit at least at different peak wavelengths, and the light exits the lens through the second outer ring section, and further wherein in the far field, the light has a substantially uniform color;
- an antenna embedded into the lens for receiving signals to control the plurality of light emitting diodes.
1 more element
An optical lens, comprising:
- a light transmissible body;
- a first surface of the light transmissible body having a reflective first outer ring section and a first central section, wherein the first outer ring section is curved towards a second surface;
- the second surface of the light transmissible body having a second outer ring section, and a reflective second central section, wherein the second outer ring section is curved towards the first surface;
- wherein light entering the optical lens through the first central section exits the optical lens through the second outer ring section, and
- further wherein a second curvature of the second outer ring section causes light rays entering the optical lens that directly strike the second outer ring to be substantially totally internally reflected back into the optical lens and reflected from the first outer ring section, and a first curvature of the first outer ring section causes light exiting the optical lens to have a predetermined divergence angle with respect to an optical axis of the lens.
2 more elements
Dependencies are inferred from the claim text.