Method of emitting an anti-collision light output from an unmanned aerial vehicle, anti-collision light for an unmanned aerial vehicle, and unmanned aerial vehicle comprising the same

1. A method of emitting an anti-collision light output from an unmanned aerial vehicle, comprising:

emitting a plurality of light flashes of different colors within a flash duration interval, with the flash duration interval being at most 0.2 s;

wherein the plurality of light flashes within the flash duration interval comprise at least one blue light flash and at least one yellow light flash.

2. The method according to claim 1 , wherein the plurality of light flashes within the flash duration interval comprise exactly one blue light flash and exactly one yellow light flash.

3. The method according claim 1 , wherein each of the plurality of light flashes within the flash duration interval is at least 20 ms.

4. The method according claim 1 , wherein the plurality of light flashes within the flash duration interval are of substantially equal length.

5. The method according to claim 1 , further comprising:

repeating the step of emitting a plurality of light flashes of different colors within a flash duration interval.

6. The method according claim 5 , wherein the step of emitting a plurality of light flashes of different colors within a flash duration interval is repeated between 40 times and 100 times per minute.

7. The method according claim 1 , further comprising:

emitting white light flashes, in case one or more human passengers are aboard the unmanned aerial vehicle.

8. A method of emitting an anti-collision light output from an unmanned aerial vehicle, comprising:

emitting a plurality of light flashes of different colors within a flash duration interval, with the flash duration interval being at most 0.2 s;

wherein the plurality of light flashes within the flash duration interval comprise at least one cyan light flash, at least one magenta light flash, and at least one yellow light flash.

9. The method according to claim 8 , wherein the plurality of light flashes within the flash duration interval comprise exactly one cyan light flash, exactly one magenta light flash, and exactly one yellow light flash.

10. The method according to claim 8 , wherein each of the plurality of light flashes within the flash duration interval is at least 20 ms.

11. The method according to claim 8 , wherein the plurality of light flashes within the flash duration interval are of substantially equal length.

12. The method according to claim 8 , further comprising:

repeating the step of emitting a plurality of light flashes of different colors within a flash duration interval.

13. Method according to claim 12 , wherein the step of emitting a plurality of light flashes of different colors within a flash duration interval is repeated between 40 times and 100 times per minute.

14. The method according to claim 8 , further comprising:

emitting white light flashes, in case one or more human passengers are aboard the unmanned aerial vehicle.

15. An anti-collision light for an unmanned aerial vehicle, comprising:

a plurality of light sources of different colors; and

a control unit coupled to the plurality of light sources,

wherein the control unit is configured to control the plurality of light sources to emit a plurality of light flashes of different colors within a flash duration interval of at most 0.2 s, and

wherein the control unit is configured to control the plurality of light sources to emit at least one blue light flash and at least one yellow light flash within a flash duration interval or wherein the control unit is configured to control the plurality of light sources to emit at least one cyan light flash, at least one magenta light flash, and at least one yellow light flash within a flash duration interval.

16. The Anti-collision light according to claim 15 ,

wherein the plurality of light sources comprise a blue light source and a yellow light source, or

wherein the plurality of light sources comprise a cyan light source, a blue light source, a red light source, and a yellow light source.

17. An anti-collision light according to claim 15 , wherein the plurality of light sources are a plurality of LEDs.

18. An unmanned aerial vehicle comprising at least one anti-collision light in accordance with claim 15 , the at least one anti-collision light anti-collision light being mounted to a vehicle body of the unmanned aerial vehicle.

19. The unmanned aerial vehicle according to claim 18 , wherein the at least one anti collision light includes an upper anti-collision light arranged on an upper portion of the unmanned aerial vehicle and a lower anti-collision light arranged on a lower portion of the unmanned aerial vehicle.

20. The unmanned aerial vehicle according to claim 18 , wherein the at least one of the at least one anti-collision lights has at least the following intensities:

400 cd in a first angular range between 0° and 5° with respect to a horizontal plane through the unmanned aerial vehicle,

240 cd in a second angular range between 5° and 10° with respect to the horizontal plane,

80 cd in a third angular range between 10° and 20° with respect to the horizontal plane,

40 cd in a fourth angular range between 20° and 30° with respect to the horizontal plane, and

20 cd in a fifth angular range between 30° and 75° with respect to the horizontal plane.