Light fixture with infrared light beam and with visible light beam

1. A light fixture comprising:

at least one visible light source emitting visible light;

at least one infrared (IR) light source emitting infrared light in an infrared spectrum;

an outer housing in which the at least one visible light source and the at least one IR light source are located;

a first projection system configured to collect at least some of the visible light emitted by the at least one visible light source and configured to generate at least one first light beam of the visible light along an optical axis having a first beam characteristic;

a second projection system configured to collect at least some of the infrared light emitted by the at least one IR light source and configured to generate at least one second light beam of the IR light along the optical axis, wherein the second projection system is configured such that, at least outside the outer housing, the second beam characteristic substantially corresponds to the first beam characteristic; and

a control unit configured to determine a control signal to be emitted by the at least one IR light source through the second light beam, the control signal including encoded control information used for controlling a light emission of a light source of a receiving unit receiving the control signal.

2. The light fixture according to claim 1 , wherein the control unit is configured to generate the control signal that includes at least one control command controlling the light emission of visible light of the light source of the receiving unit.

3. The light fixture according claim 1 , further comprising a dichroic filter configured to reflect one of the infrared light and the visible light and to be transparent with respect to the other of the infrared light and the visible light, wherein the second beam characteristic substantially corresponds to the first beam characteristic in parts of the first and second light beams downstream of the dichroic filter.

4. The light fixture according to claim 1 , further comprising an optical gate through which the first light beam and the second light beam pass, wherein the second beam characteristic substantially corresponds to the first beam characteristic in parts of the first and second light beams downstream of the optical gate.

5. The light fixture according to claim 4 , wherein the first projecting system is configured to image a beam shaping object arranged near said optical gate at a distance along said optical axis, and wherein the second projecting system is configured to image a beam shaping object arranged near said optical gate at said distance along said optical axis, wherein the images provided by said first and second light beams are substantially identical.

6. The light fixture according claim 1 , further comprising at least one light collecting element configured to collect and mix the light emitted by one or more of the at least one visible light source and by one or more of the at least one of the IR light sources, wherein the second beam characteristic substantially corresponds to the first beam characteristic in parts of the first and second light beams downstream of the at least one light collecting element.

7. The light fixture according to claim 1 , further comprising a common support plate on which the at least one visible light source and the at least one IR light source are installed.

8. The light fixture according claim 1 , wherein the first projection system comprises at least one of a colour mixing unit, a colour filter, a prism, and a gobo.

9. The light fixture according to claim 1 , further comprising a zoom group configured to change one or more beam characteristics of the first beam and of the second beam, wherein the zoom group is located in a portion of a path of the first and second light beams where the second beam characteristic substantially corresponds to the first beam characteristic.

10. The light fixture according to claim 1 , wherein the first light projection system comprises at least one first light collecting element configured to collect light from at least one visible light source and to generate at least one first light beam.

11. The light fixture according to claim 10 , wherein one first light collecting element is configured to collect light from a plurality of visible light sources and to generate a plurality of first light beams.

12. The light fixture according claim 1 , wherein the second light projection system comprises at least one second light collecting element configured to collect light from at least one IR light source and to generate at least one second light beam.

13. The light fixture according to claim 12 , wherein one second light collecting element is configured to collect light from a plurality of IR light sources and to generate a plurality of second light beams.

14. The light fixture according to claim 12 , wherein the number of second light collecting elements determines the number of second light beams.

15. A system, comprising:

a light fixture comprising:

at least one visible light source emitting visible light,

at least one infrared (IR) light source emitting infrared light in an infrared spectrum,

an outer housing in which the at least one visible light source and the at least one IR light source are located,

a first projection system configured to collect at least some of the visible light emitted by the at least one visible light source and configured to generate at least one first light beam of the visible light along an optical axis having a first beam characteristic, and

a second projection system configured to collect at least some of the infrared light emitted by the at least one IR light source and configured to generate at least one second light beam of the IR light along the optical axis, wherein the second projection system is configured such that, at least outside the outer housing, the second beam characteristic substantially corresponds to the first beam characteristic; and

a plurality of response units, wherein each response unit comprises:

at least one IR receiver configured to receive the second light beam, and

at least one light source emitting light in the visible range,

wherein light sources of the plurality of response units that are illuminated by the first and second light beams are controlled in accordance with a control signal encoded in the at least one second light beam.

16. A light fixture comprising:

at least one visible light source emitting visible light;

at least one infrared (IR) light source emitting infrared light in an infrared spectrum;

an outer housing in which the at least one visible light source and the at least one IR light source are located;

a first projection system configured to collect at least some of the visible light emitted by the at least one visible light source and configured to generate at least one first light beam of the visible light along an optical axis having a first beam characteristic;

a second projection system configured to collect at least some of the infrared light emitted by the at least one IR light source and configured to generate at least one second light beam of the IR light along the optical axis, wherein the second projection system is configured such that, at least outside the outer housing, the second beam characteristic substantially corresponds to the first beam characteristic; and

a zoom group configured to change one or more beam characteristics of the first beam and of the second beam, wherein the zoom group is located in a portion of a path of the first and second light beams where the second beam characteristic substantially corresponds to the first beam characteristic.

17. A light fixture comprising:

at least one visible light source emitting visible light;

at least one infrared (IR) light source emitting infrared light in an infrared spectrum;

an outer housing in which the at least one visible light source and the at least one IR light source are located;

a first projection system configured to collect at least some of the visible light emitted by the at least one visible light source and configured to generate at least one first light beam of the visible light along an optical axis having a first beam characteristic, wherein the first light projection system comprises at least one first light collecting element configured to collect light from a plurality of visible light sources and to generate a plurality of first light beams; and

a second projection system configured to collect at least some of the infrared light emitted by the at least one IR light source and configured to generate at least one second light beam of the IR light along the optical axis, wherein the second projection system is configured such that, at least outside the outer housing, the second beam characteristic substantially corresponds to the first beam characteristic.

18. A light fixture comprising:

at least one visible light source emitting visible light;

at least one infrared (IR) light source emitting infrared light in an infrared spectrum;

an outer housing in which the at least one visible light source and the at least one IR light source are located;

a first projection system configured to collect at least some of the visible light emitted by the at least one visible light source and configured to generate at least one first light beam of the visible light along an optical axis having a first beam characteristic; and

a second projection system configured to collect at least some of the infrared light emitted by the at least one IR light source and configured to generate at least one second light beam of the IR light along the optical axis, wherein the second projection system is configured such that, at least outside the outer housing, the second beam characteristic substantially corresponds to the first beam characteristic, wherein the second light projection system comprises at least one first light collecting element configured to collect light from a plurality of IR light sources and to generate a plurality of second light beams.