Adjustable-beam luminaire
A luminaire for providing configurable static lighting or dynamically-adjustable lighting. The luminaire uses an array of focusing elements that act on light provided via a corresponding array of sources or via an edge-lit lightguide. Designs are provided for adjusting the number of distinct beams produced by the luminaire, as well as the angular width, angular profile, and pointing angle of the beams. Designs are also provided for systems utilizing the adjustable luminaires in various applications.
1. An apparatus for emitting light comprising:
one or more light sources;
an electrical connection and heat-spreading element connected to the light sources;
a focusing element configured to focus light emitted from the light sources to produce a beam of light that is at least partially collimated; and
an adjuster configured to alter, over a range of positions, an in-plane position of the focusing element with respect to the light sources, where the adjuster is further configured to at least laterally translate an in-plane position of the focusing element with respect to one or more of the light sources, thereby enabling control of an overall light beam emitted by the apparatus.
2. The apparatus of claim 1 wherein the focusing element comprises a refractive lens.
3. The apparatus of claim 2 further comprising a reflective lens disposed with respect to the light sources and the refractive lens such that light emitted by the light sources first strikes the reflective lens and then transits the refractive lens.
4. The apparatus of claim 1 wherein the focusing element comprises a reflective lens having a receiving face that is illuminated by the light sources to reflect light from the light sources.
5. The apparatus of claim 4 wherein the reflective lens comprises a dielectric-filled reflective lens.
6. The apparatus of claim 4 wherein the electrical connection and heat-spreading element is configured to only partially block light reflected by the reflective lens.
7. The apparatus of claim 6 wherein the electrical connection and heat-spreading element comprises a narrow strip.
8. The apparatus of claim 1 wherein the electrical connection and heat-spreading element comprises one or more metal-core printed circuit boards.
9. The apparatus of claim 1 wherein the light sources are one or more vertical-cavity surface emitting lasers.
10. The apparatus of claim 1 wherein the light sources are one or more light emitting diodes.
11. The apparatus of claim 10 wherein the light emitting diodes have substantially flat emission faces.
12. The apparatus of claim 1 wherein the one or more light sources comprise only a single light source.
13. The apparatus of claim 1 wherein the adjuster is further configured to at least adjust a distance between the focusing element and at least one of the light sources, thereby enabling control of divergence of the overall light beam emitted by the apparatus.
14. The apparatus of claim 1 , wherein the adjuster is manually- operated.
15. The apparatus of claim 1 , wherein the adjuster is operated by actuators connected to a control system.
16. The apparatus of claim 1 wherein the one or more light sources comprise multiple light sources.
17. An apparatus for emitting light comprising:
one or more light sources;
an electrical connection and heat-spreading element connected to the light sources;
a focusing element configured to focus light emitted from the light sources to produce a beam of light that is at least partially collimated; and
an adjuster configured to alter, over a range of positions, an in-plane position of the focusing element with respect to the light sources, thereby enabling control of an overall light beam emitted by the apparatus;
wherein the focusing element comprises a reflective lens having a light receiving face that is illuminated by the light sources to reflect light from the light sources,
and further wherein:
the electrical connection and heat-spreading element is configured to only partially block light reflected by the face of the reflective lens,
the light sources are light emitting diodes, and
the adjuster is further configured to at least laterally translate the focusing element with respect to the light sources, thereby enabling control of a direction of an overall light emitted by the apparatus.