Configurable luminaires and components
A steerable illumination fixtures include an emitting source and a refractive optical system that steers an emitted beam by relative translation of the emitting source against the optical system. The light emitting source may be placed along an optical axis of one or more lenses to produce an output beam along that axis, or translated in-plane (orthogonal to the optical axis) relative to the lenses to produce a steered beam. The optical system may include refractive lenses and in some embodiments mixing channels and/or one or more baffles with apertures. The design is typically optimized to produce a round, uniform beam that retains approximately the same power level and beam width as it is steered. It is beneficial, but not required, that a second lens have a diameter equal to or larger than a first lens. The lenses may be configured so that the effective focal plane of the two lenses together is located approximately at the plane of the light emitting source.
1. An adjustable luminaire comprising:
a light-emitting source having a light-emitting major surface and an optical center,
a first lens having a first optical axis,
a second lens having a second optical axis,
the two lenses disposed with their respective optical axes being parallel, the first lens disposed adjacent the light-emitting major surface, and the second lens disposed adjacent the first lens, such that light passes from the light-emitting major surface, to the first lens and then to the second lens, and
a mechanism in contact with at least the light-emitting source, or at least a selected one of the lenses, that provides adjustment of a position of the respective optical axis of the selected of the lenses with respect to a position of the light emitting source in a direction orthogonal to the optical axis of the selected one of the lenses, to thereby control a direction of a resulting light beam emitted from the luminaire.
2. The adjustable luminaire of claim 1 , wherein:
the first optical axis of the first lens and the second optical axis of the second lens are fixed in position relative to each other, and
the mechanism provides for the adjustment of the position of the optical axis of the first lens and the optical axis of the second lens together, relative to the optical center of the light-emitting source.
3. The adjustable luminaire of claim 1 , wherein:
the mechanism provides for the adjustment of the position of the first optical axis and of the second optical axis relative to the optical center in a common direction of adjustment but at different rates of adjustment.
4. The adjustable luminaire of claim 1 , wherein the first lens is of greater optical power than the second lens.
5. The adjustable luminaire of claim 1 , wherein at least one of the lenses has at least one textured surface.
6. The adjustable luminaire of claim 1 , wherein at least one of the lenses has one of a concave surface, a convex surface, or a planar surface.
7. The adjustable luminaire of claim 1 , additionally comprising:
a beam conditioner disposed adjacent the light source.
8. The adjustable luminaire of claim 7 , wherein the beam conditioner is one of a lens, a collimating reflector, or a light mixing channel.
9. The adjustable luminaire of claim 7 , wherein the beam conditioner provides for the reduction of the light beam emitted by the light source to an angular width of less than 120 degrees.
10. The adjustable luminaire of claim 1 , wherein the light-emitting source comprises a light-emitting diode.
11. The adjustable luminaire of claim 10 , wherein the light-emitting source comprises a plurality of light-emitting diodes.
12. The adjustable luminaire of claim 11 , wherein the light-emitting source comprises a plurality of light-emitting diodes and a contiguous phosphor-bearing layer disposed over the light-emitting diodes.
13. The adjustable luminaire of claim 11 , where the mechanism also provides for adjustment of a distance between the selected one of the lenses and the light source in a direction parallel to the optical axis of the selected one of the lenses.
14. The adjustable luminaire of claim 1 , where the mechanism comprises a barrel to retain one or more of the first and second lenses.
15. The adjustable luminaire of claim 1 , where the mechanism comprises one or more magnets and one or more portions of ferromagnetic material and provides for adjusting the position of the one or more magnets over the one or more portions of ferromagnetic material.
16. The adjustable luminaire of claim 1 , wherein light from the light-emitting source enters the first lens primarily in an area that is smaller than the full entry face of the first lens, and where the location of this area depends upon a position of the first lens relative to the light-emitting source.