US 11,950,981 B2
Scanning system and calibration thereof
Tal Verker, Ofra (IL); Adi Levin, Nes Tziona (IL); Ofer Saphier, Rechovot (IL); and Maayan Moshe, Ramat HaSharon (IL)
Assigned to Align Technology, Inc., San Jose, CA (US)
Filed by Align Technology, Inc., San Jose, CA (US)
Filed on Apr. 19, 2023, as Appl. No. 18/136,831.
Application 15/610,515 is a division of application No. 14/825,173, filed on Aug. 13, 2015, granted, now 9,675,430, issued on Jun. 13, 2017.
Application 18/136,831 is a continuation of application No. 17/740,113, filed on May 9, 2022, granted, now 11,672,631.
Application 17/740,113 is a continuation of application No. 17/492,453, filed on Oct. 1, 2021, granted, now 11,439,483, issued on Sep. 13, 2022.
Application 17/492,453 is a continuation of application No. 17/161,503, filed on Jan. 28, 2021, granted, now 11,135,039, issued on Oct. 5, 2021.
Application 17/161,503 is a continuation of application No. 16/823,156, filed on Mar. 18, 2020, granted, now 10,952,827, issued on Mar. 23, 2021.
Application 16/823,156 is a continuation of application No. 16/708,293, filed on Dec. 9, 2019, granted, now 10,624,720, issued on Apr. 21, 2020.
Application 16/708,293 is a continuation of application No. 16/396,484, filed on Apr. 26, 2019, granted, now 10,507,089, issued on Dec. 17, 2019.
Application 16/396,484 is a continuation of application No. 16/286,437, filed on Feb. 26, 2019, granted, now 10,507,088, issued on Dec. 17, 2019.
Application 16/286,437 is a continuation of application No. 15/610,515, filed on May 31, 2017, granted, now 10,327,872, issued on Jun. 25, 2019.
Claims priority of provisional application 62/037,778, filed on Aug. 15, 2014.
Prior Publication US 2023/0293272 A1, Sep. 21, 2023
Int. Cl. G01B 11/24 (2006.01); A61C 9/00 (2006.01); G02B 21/00 (2006.01); G02B 23/24 (2006.01); G02B 23/26 (2006.01); G02B 27/00 (2006.01)
CPC A61C 9/0066 (2013.01) [G01B 11/24 (2013.01); G02B 21/006 (2013.01); G02B 23/2446 (2013.01); G02B 23/2461 (2013.01); G02B 23/26 (2013.01); G02B 27/0025 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A non-calibrated intraoral scanning system to be modified to a calibrated intraoral scanning system based on generating a three-dimensional (3D) representation of a calibration object, comprising:
an intraoral imaging apparatus, comprising:
a light source configured to emit light, wherein the intraoral imaging apparatus is to transmit the light onto the calibration object; and
an image sensor comprising a plurality of sensor elements, wherein the image sensor is to form a sequence of images of the calibration object, each image comprising a plurality of pixels; and
a processor to perform a calibration of the non-calibrated intraoral scanning system, wherein the processor is to:
import a reference 3D representation of the calibration object in a real-world coordinate system;
transform, using one or more transformations, at least a set of the pixels from each image of the sequence of images to a dataset of coordinates of the calibration object in a real-world coordinate system;
align the dataset of coordinates of the calibration object in the real-world coordinate system to the reference 3D representation of the calibration object in the real-world coordinate system;
derive a difference between the dataset of coordinates of the calibration object and the reference 3D representation of the calibration object in the real-world coordinate system; and
modify, based on the difference, at least one of the one or more transformations such that a location of one or more points in the dataset of coordinates of the calibration object in the real-world coordinate system is adjusted in three dimensions, wherein the non-calibrated intraoral scanning system is modified to a calibrated intraoral scanning system.