Patent ID: 11896461
Assignee: ALIGN TECHNOLOGY, INC.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC A  G  H | IPC A  G  H

Claim 5:
6. The apparatus of claim 1, further comprising:
a target having a plurality of regions;
wherein:
each structured light projector of the plurality of structured light projectors has at least one region of the target in its field of illumination;
each camera of the two or more cameras has at least one region of the target in its field of view;
a plurality of the regions of the target are in the field of view of one of the cameras and in the field of illumination of one of the structured light projectors; and
the one or more processors are further configured to:
receive data from the two or more cameras indicative of a position of the target with respect to the pattern of light;
compare the received data to a stored calibration position of the target, wherein a discrepancy between (i) the received data indicative of the position of the target and (ii) the stored calibration position of the target indicates a shift of the projector rays and the camera rays from their respective calibration values; and
account for the shift of the projector rays and the camera rays in identification of the three-dimensional locations.