Universal traffic light luminaire
First Claim
1. A traffic light luminaire, comprising:
- at least two light sources;
an elongated light homogenizing device configured to spatially superimpose light emitted by the at least two light sources into a combined beam of superimposed light;
wherein the light homogenizing device comprises an optical waveguide including an input area feeding the light emitted by the at least two light sources into the optical waveguide and an output area emitting the beam of superimposed light;
a collimating device configured to collimate the beam of superimposed light emitting from the output area of the optical waveguide; and
a light distribution device for spreading the collimated light within a specific solid angle with a specific luminous intensity distribution;
wherein at least one of the at least two light sources is a high brightness light source;
wherein the light distribution device is a microstructured distributor having a microstructured surface, wherein each equal-sized macroscopic section of the microstructured distributor contributes to the luminous intensity distribution in the same way within said whole specified solid angle.
1 Assignment
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Accused Products
Abstract
A traffic light luminaire includes at least one light source, a collimating device for collimating light emitted by the at least one light source, and a light distribution device for spreading the collimated light within a specific solid angle with a specific luminous intensity distribution. The light source is a high brightness light source, and the light distribution device is a microstructured distributor having a micro-structured surface, wherein each equal-sized macroscopic section of the microstructured distributor contributes to the luminous intensity distribution in the same way within said whole specified solid angle. Thereby a low maintenance traffic light luminaire is provided which generates a homogeneous light distribution for a variety of trail arrangements (right curve, left curve, straight line) independent of the distance of the viewer.
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Citations
19 Claims
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1. A traffic light luminaire, comprising:
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at least two light sources; an elongated light homogenizing device configured to spatially superimpose light emitted by the at least two light sources into a combined beam of superimposed light; wherein the light homogenizing device comprises an optical waveguide including an input area feeding the light emitted by the at least two light sources into the optical waveguide and an output area emitting the beam of superimposed light; a collimating device configured to collimate the beam of superimposed light emitting from the output area of the optical waveguide; and a light distribution device for spreading the collimated light within a specific solid angle with a specific luminous intensity distribution; wherein at least one of the at least two light sources is a high brightness light source; wherein the light distribution device is a microstructured distributor having a microstructured surface, wherein each equal-sized macroscopic section of the microstructured distributor contributes to the luminous intensity distribution in the same way within said whole specified solid angle. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A traffic light luminaire, comprising:
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at least two light sources each emitting a different wavelength of light at least 50 nm apart, where the 50 nm is plus or minus 5 nm; a light homogenizing device configured to spatially superimpose the light emitted by the at least two light sources into a combined beam of superimposed light; the light homogenizing device comprising an optical fiber including an input area coupling the beam of superimposed light and an output area emitting the beam of superimposed light; a collimating device configured to collimate the beam of superimposed light emitting from the output area of the optical fiber; a light distribution device for spreading the collimated light within a specific solid angle with a specific luminous intensity distribution, wherein the light distribution device is a microstructured distributor having a microstructured surface, wherein each equal-sized macroscopic section of the microstructured distributor contributes to the luminous intensity distribution in the same way within the entirety of the specified solid angle; and wherein the at least two light sources with the light homogenizing device are placed within a source housing, and the collimating device with the microstructured distributor are placed in an optical head housing, wherein the source housing and the optical head housing are physically separated from each other while optically connected via the optical fiber. - View Dependent Claims (17)
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18. A traffic light luminaire, comprising:
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at least two light sources each emitting a different wavelength of light at least 50 nm apart, where the 50 nm is plus or minus 5 nm, and where each of the different wavelengths of light are within the visible spectrum; an infrared light source emitting an infrared wavelength of light; a light homogenizing device configured to spatially superimpose the light emitted by the at least two light sources and the infrared wavelength of light into a combined beam of superimposed light; the light homogenizing device comprising an optical fiber including an input area coupling the beam of superimposed light and an output area emitting the beam of superimposed light; a collimating device configured to collimate the beam of superimposed light emitting from the output area of the optical fiber; and a light distribution device for spreading the collimated light within a specific solid angle with a specific luminous intensity distribution, wherein the light distribution device is a microstructured distributor having a microstructured surface, wherein each equal-sized macroscopic section of the microstructured distributor contributes to the luminous intensity distribution in the same way within the entirety of the specified solid angle. - View Dependent Claims (19)
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Specification