Surveillance apparatus having an optical camera and a radar sensor

1. A surveillance apparatus comprising:

an optical camera configured to capture images based on received light, said optical camera having a camera aperture; and

a radar sensor having one or more transmitting antennas configured to emit electromagnetic radiation and one or more receiving antennas configured to receive electromagnetic radiation, said one or more transmitting antennas and said one or more receiving antennas forming a virtual antenna array,

wherein said one or more transmitting antennas and said one or more receiving antennas are arranged with respect to the optical camera such that the center area of the virtual antenna array and the center area of the camera aperture coincide, and

at least one of said one or more transmitting antennas and/or at least one of said one or more receiving antennas is arranged to at least partially cover the camera aperture which is a physical feature of the optical camera.

2. The surveillance apparatus according to claim 1 ,

wherein said one or more transmitting antennas and said one or more receiving antennas are arranged on the periphery of the surveillance apparatus.

3. The surveillance apparatus according to claim 2 ,

wherein said one or more transmitting antennas and said one or more receiving antennas are arranged around the camera aperture.

4. The surveillance apparatus according to claim 2 ,

wherein said one or more transmitting antennas and said one or more receiving antennas are symmetrically arranged around the camera aperture.

5. The surveillance apparatus according to claim 1 ,

wherein at least one of said one or more transmitting antennas and/or at least one of said one or more receiving antennas are substantially translucent and are arranged on top of said camera aperture.

6. The surveillance apparatus according to claim 5 ,

wherein a translucent antenna comprises an electrically conductive layer comprising at least one of a translucent electrically conductive material and an electrically conductive mesh structure.

7. The surveillance apparatus according to claim 6 ,

wherein a first electrically conductive layer comprises a ground plane and a second electrically conductive layer comprises a transmitting antenna or a receiving antenna.

8. The surveillance apparatus according to claim 7 ,

wherein the ground plane comprises a slot for feeding the transmitting antenna or a receiving antenna.

9. The surveillance apparatus according to claim 8 ,

wherein the camera cover comprises at least one dielectric layer, in particular made from at least one of glass or a translucent polymer, and two electrically conductive layers.

10. The surveillance apparatus according to claim 1 ,

wherein the optical camera further comprises a camera frame and wherein said one or more transmitting antennas and said one or more receiving antennas are arranged at said frame.

11. The surveillance apparatus according to claim 1 ,

wherein the optical camera further comprises a translucent camera cover.

12. The surveillance apparatus according to claim 11 ,

wherein the camera cover comprises a substantially hemispheric camera dome, in particular having a polygonal, cylindrical or circular outline.

13. The surveillance apparatus according to claim 1 ,

wherein the radar sensor is adapted to provide at least one of a direction, range and speed of an object relative to the surveillance apparatus.

14. The surveillance apparatus according to claim 1 ,

further comprising processing circuitry that processes the captured images of the optical camera and the received electromagnetic radiation of the radar sensor and providing an indication of the detection of the presence of one or more objects.

15. The surveillance apparatus according to claim 1 ,

further comprising a movement unit for movement of the camera and/or the camera aperture, wherein said one or more transmitting antennas and said one or more receiving antennas are arranged to be moved together with the camera and/or the camera aperture.

16. The surveillance apparatus according to claim 1 ,

comprising a single optical camera having a single camera aperture, wherein the center area of the camera aperture corresponds to the central point of the camera aperture.

17. The surveillance apparatus according to claim 1 ,

comprising two or more optical cameras each having an individual camera aperture, wherein the individual camera apertures form a single common camera aperture and wherein the center area of the common camera aperture corresponds to the central area of the individual camera apertures.

18. A surveillance method comprising:

capturing images based on received light with an optical camera, said optical camera having a camera aperture; and

emitting and receiving electromagnetic radiation with a radar sensor, having one or more transmitting antennas configured to emit electromagnetic radiation and one or more receiving antennas configured to receive electromagnetic radiation, said one or more transmitting antennas and said one or more receiving antennas forming a virtual antenna array,

wherein said one or more transmitting antennas and said one or more receiving antennas are arranged such with respect to the optical camera that the center area of the virtual antenna array and the center area of the camera aperture coincide, and

at least one of said one or more transmitting antennas and/or at least one of said one or more receiving antennas is arranged to at least partially cover the camera aperture which is a physical feature of the optical camera.

19. A non-transitory computer-readable recording medium that stores therein a computer program product, which, when executed by a processor, causes the method according to claim 18 be performed.