Patent ID: 11940262
Assignee: FNV IP B.V.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 24:
25. An apparatus for communicating with at least one external beacon, the apparatus comprising:
at least one non-refractive optical element connected to a processing unit and configured as an objective to receive at least one light beam transmitted from the at least one external beacon and project the at least one light beam on an image sensor, wherein the at least one non-refractive optical element comprises a diffractive element configured to diffract the at least one light beam to form a diffracted light pattern on the image sensor;
the image sensor connected to the processing unit and to the at least one non-refractive optical element and being configured to form image data based on the at least one light beam; and
the processing unit configured to communicate with a memory storing a computer program comprising instructions and data, which when executed by the processing unit, causes the processing unit to:
determine light intensity or wavelength of the at least one light beam based on the image data, and derive additional data as transmitted by the at least one beacon which modulated the light intensity or wavelength;
identify the at least one beacon within the image data based on the at least one light beam;
determine current location data of the at least one beacon based on the image data:
compare the current location data with former location data of the at least one beacon as stored in the memory; and
determine whether the object has moved relative to a fixed reference frame based on the comparison.