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

Claim 27:
28. A method for monitoring positions on an external object having at least one beacon attached thereto, the method comprising:
transmitting light from the at least one beacon;
projecting the light transmitted from the at least one beacon on at least one image sensor using at least one non-refractive optical element configured as objective for projecting light on the at least one image sensor, wherein the at least one non-refractive optical element comprises a diffractive element and projecting light onto the at least one image sensor comprises forming a diffracted light pattern on the at least one image sensor by the diffractive element;
processing image data formed by the at least one image sensor to filter image data components relating to background light and render image data components relating to at least one light beam;
identifying the at least one beacon within the image data based on the at least one light beam;
determining current location data of the at least one beacon based on the image data;
comparing the current location data with former location data of the at least one beacon as stored in memory; and
determining whether the object has moved relative to a fixed reference frame based on the comparison.