Adjustable-beam luminaires
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:
an array of light sources arranged in a first plane;
a network of electrical connections and heat-spreading elements connected to the light sources;
an array of focusing elements in a second plane substantially parallel to the first plane, the array of focusing elements being aligned with and spaced from the array of light sources, wherein each focusing element of the array of focusing elements is associated with at least one of the light sources, and each focusing element emits a corresponding collimated beam of light; and
an adjuster configured to at least alter, over a range of positions, an in-plane position of the array of light sources with respect to the array of focusing elements, the alteration enabling control of an overall light beam emitted by the apparatus.
2. The apparatus of claim 1 wherein the focusing elements comprise refractive lenses.
3. The apparatus of claim 2 further comprising an array of reflective lenses wherein each reflective lens is associated with the at least one of the light sources and one of the refractive lenses, and wherein light emitted by a light source first strikes a reflective lens and then transits an associated refractive lens before being emitted from the apparatus.
4. The apparatus of claim 1 wherein the focusing elements comprise reflective lenses, each reflective lens having a light receiving face that is illuminated by the at least one of the light sources to reflect light from the at least one of the light sources.
5. The apparatus of claim 4 wherein the reflective lenses comprise dielectric-filled reflective lenses.
6. The apparatus of claim 4 wherein the network of electrical connections and heat-spreading elements is configured to only partially block light reflected by the faces of the reflective lenses.
7. The apparatus of claim 6 wherein the network of electrical connections and heat-spreading elements comprise narrow strips.
8. The apparatus of claim 1 wherein the network of electrical connections and heat-spreading elements comprise one or more metal-core printed circuit boards.
9. The apparatus of claim 1 wherein the light sources are vertical-cavity surface emitting lasers.
10. The apparatus of claim 1 wherein the light sources are 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 there is only a single light source associated with each focusing element.
13. The apparatus of claim 1 wherein the adjuster is configured to at least rotate the array of focusing elements with respect to the array of light sources, the rotation enabling control of divergence of the overall light emitted by the apparatus.
14. The apparatus of claim 1 wherein the adjuster mechanism is configured to at least laterally translate the array of focusing elements with respect to the array of light sources, the translation enabling control of a direction of an overall light emitted by the apparatus.
15. The apparatus of claim 1 wherein the adjuster is configured to at least adjust a distance between the array of focusing elements and the array of light sources, the adjustment enabling control of divergence of an overall light emitted by the apparatus.
16. The apparatus of claim 1 wherein the adjuster is manually-operated.
17. The apparatus of claim 1 wherein the adjuster is operated by actuators connected to a control system.
18. The apparatus of claim 1 wherein there are multiple light sources associated with each focusing element.
19. The apparatus of claim 1 wherein the focusing elements comprise reflective lenses, each reflective lens having a light receiving face that is illuminated by the at least one of the light sources to reflect light from the at least one of the light sources, wherein
the network of electrical connections and heat-spreading elements comprise one or more metal core printed circuit boards configured to only partially block light reflected by the faces of the reflective lenses,
wherein the light sources are light emitting diodes, and
wherein the adjuster is configured to at least laterally translate the array of focusing elements with respect to the array of light sources, the translation enabling control of a direction of an overall light emitted by the apparatus.