Luminaire with light guide
Disclosed is a luminaire ( 1 ) comprising a circular light guide ( 10 ), the light guide comprising an edge portion ( 11 ) in between a first major surface ( 15 ) and a second major surface ( 17 ), at least part ( 16 ) of the first major surface guide tapering in a direction away from said edge portion; a plurality of solid state lighting elements ( 40 ) arranged along said edge portion; and a plurality of outcoupling elements ( 30 ) arranged in a pattern on the second major surface of the circular light guide. The luminaire ( 1 ) may further include a controller ( 50 ) for individually controlling the solid state lighting elements ( 40 ) such as to configure the luminous output, e.g. the beam profile, of the luminaire.
1. A luminaire comprising:
an elliptical plate-shaped light guide comprising an edge portion in between a first major surface and a second major surface, at least portion of the first major surface guide tapering in a direction away from said edge portion;
a plurality of solid state lighting elements arranged along said edge portion;
a plurality of outcoupling elements arranged in a pattern on at least one of the major surfaces of the elliptical plate-shaped light guide,
the elliptical plate-shaped light guide is divided into a first radial segment and a second radial segment, the first radial segment having a constant thickness and comprising the edge portion; wherein the portion of the first major surface belongs to the second radial segment and tapers from a boundary region with the first radial segment to a further edge portion of the elliptic plate-shaped light guide; and
wherein the pattern includes a first pattern on the first radial segment and a second pattern on the second radial segment, the first pattern being different to the second pattern.
2. The luminaire of claim 1 , further comprising a controller arranged to individually control the solid state lighting elements.
3. The luminaire of claim 2 , further comprising a wireless communication module coupled to the controller for remotely controlling the controller.
4. The luminaire of claim 1 , wherein the elliptical plate-shaped light guide is a circular plate-shaped light guide.
5. The luminaire of claim 1 , wherein each radial segment is a semi-circular segment or a symmetrical, semi-elliptical segment.
6. The luminaire of claim 1 , wherein the first pattern is a first Gaussian spread and the second pattern is a second Gaussian spread having a spread angle twice as large as the first Gaussian spread.
7. The luminaire of claim 1 , wherein the plurality of outcoupling elements is provided on the second major surface.
8. The luminaire of claim 1 , wherein said second major surface is textured to form said outcoupling elements, or wherein the outcoupling elements comprise 3-D optical elements or printed white dots.
9. The luminaire of claim 1 , wherein the second major surface is planar.
10. The luminaire of claim 1 , wherein the elliptical plate-shaped light guide comprises a polymer material selected from polycarbonate, poly(methyl methacrylate) and polyethylene terephthalate.
11. The luminaire of claim 1 , wherein the plurality of solid state lighting elements contains solid state elements adapted to produce respective luminous outputs having different spectral compositions.
12. The luminaire of claim 1 , wherein the luminaire is a street lamp.
13. A luminaire comprising:
an elliptical plate-shaped light guide comprising an edge portion in between a first major surface and a second major surface, at least portion of the first major surface guide tapering in a direction away from said edge portion;
a plurality of solid state lighting elements arranged along said edge portion;
a plurality of outcoupling elements arranged in a pattern on at least one of the major surfaces of the elliptical plate-shaped light guide,
the elliptical plate-shaped light guide is divided into a first radial segment and a second radial segment, the first radial segment having a constant thickness and comprising the edge portion; wherein the portion of the first major surface belongs to the second radial segment and tapers from a boundary region with the first radial segment to a further edge portion of the elliptic plate-shaped light guide; and
a at least one optical element optically coupled to the second major surface, wherein the at least one optical element comprises a plurality of lenses.
14. The luminaire of claim 13 , wherein the at least one optical element comprises a plurality of toric lenses.