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    Ray tracking for intraoral 3D scanner
    1.
    发明授权
    Ray tracking for intraoral 3D scanner 有权

    公开(公告)号：US11930154B2

    公开(公告)日：2024-03-12

    申请号：US18156349

    申请日：2023-01-18

    Applicant: Align Technology, Inc.

    Inventor： Ofer Saphier ,  Tal Levy ,  Gal Peleg ,  Eliran Dafna ,  Sergei Ozerov ,  Tal Verker ,  Nir Makmel ,  Yossef Atiya

    IPC: H04N13/204 ,  G01B11/25 ,  G06T7/521 ,  H04N1/00

    CPC classification number: H04N13/204 ,  G01B11/25 ,  G06T7/521 ,  H04N1/00018

    Abstract: An intraoral scanning system comprises and intraoral scanner and a processor. The intraoral scanner comprises one or more cameras and one or more structured light projectors, the intraoral scanner to generate a series of images using the one or more cameras, each image including at least a portion of a pattern projected by the one or more structured light projectors onto an intraoral three-dimensional surface. The processor runs a correspondence algorithm to compute respective three-dimensional positions of a plurality of features of the pattern on the intraoral three-dimensional surface, as captured in the series of images. The processor identifies the computed three-dimensional position of a detected feature of the pattern as corresponding to a particular projector ray r, in at least a subset of the series of images. The processor tracks the particular projector ray r across one or more additional images of the series of images.

    INTRAORAL 3D SCANNER CALIBRATION
    2.
    发明公开
    INTRAORAL 3D SCANNER CALIBRATION 审中-公开

    公开(公告)号：US20240197448A1

    公开(公告)日：2024-06-20

    申请号：US18537773

    申请日：2023-12-12

    Applicant: Align Technology, Inc.

    Inventor： Ofer Saphier ,  Pavel Gorodetsky ,  Tal Levy ,  Eddy Pincu ,  Ditza Auerbach ,  Raphael Levy ,  Tal Verker ,  Noam Shekel ,  Eliran Dafna

    IPC: A61C9/00

    CPC classification number: A61C9/006

    Abstract: An apparatus for intraoral scanning comprises an elongate wand comprising a probe at a distal end of the wand, one or more cameras and a computer processor. The one or more cameras are disposed within the probe and arranged within the probe such that the one or more cameras receive rays of light from an intraoral cavity in a non-central manner, wherein the non-central manner in which the one or more cameras receive the rays of light from the intraoral cavity introduces image distortion. The computer processor is configured to generate a three-dimensional model of an intraoral surface based on images from the one or more cameras, wherein the computer processor compensates for the image distortion specifically introduced by the non-central manner in which the one or more cameras receive the rays of light from the intraoral cavity.

    Automatic calibration of intraoral 3D scanner
    5.
    发明授权
    Automatic calibration of intraoral 3D scanner 有权

    公开(公告)号：US12143558B2

    公开(公告)日：2024-11-12

    申请号：US18418209

    申请日：2024-01-19

    Applicant: Align Technology, Inc.

    Inventor： Ofer Saphier ,  Tal Levy ,  Gal Peleg ,  Eliran Dafna ,  Sergei Ozerov ,  Tal Verker ,  Nir Makmel ,  Yossef Atiya

    IPC: H04N13/204 ,  G01B11/25 ,  G06T7/521 ,  H04N1/00

    Abstract: An intraoral scanner comprises one or more structured light projectors and two or more cameras, where each structured light projector projects a pattern of light onto an intraoral three-dimensional (3D) surface and the two or more cameras capture one or more sets of images, wherein each image includes at least a portion of the projected pattern of light. A processor solves a correspondence problem within a set of images of the one or more sets of images such that points in 3D space are determined based on correspondence of captured features in the set of images to projected features of at least the portion of the projected pattern, wherein said points in 3D space form a solution to the correspondence problem. The processor calibrates the intraoral scanner by performing an adjustment to stored calibration data associated with the intraoral scanner based on the solution to the correspondence problem.

    Dental scanning system with structured light projection
    7.
    发明授权
    Dental scanning system with structured light projection 有权

    公开(公告)号：US12178685B2

    公开(公告)日：2024-12-31

    申请号：US18418211

    申请日：2024-01-19

    Applicant: Align Technology, Inc.

    Inventor： Ofer Saphier ,  Yossef Atiya ,  Arkady Rudnitsky ,  Nir Makmel ,  Sergei Ozerov ,  Tal Verker ,  Tal Levy

    IPC: A61C9/00 ,  A61B1/00 ,  A61B1/24 ,  G02B27/42 ,  G06T7/521 ,  G06T7/586 ,  G06T7/80 ,  G06T17/00 ,  H04N9/31

    Abstract: A dental scanning system comprises an intraoral scanner and one or more processors. The intraoral scanner comprises one or more light projectors configured to project a pattern (comprising a plurality of pattern features) on a dental object, and two or more cameras configured to acquire sets of images, each comprising at least one image from each camera. The processor(s) are configured to determine a correspondence between pattern features in the pattern of light and image features in each set of images by determining intersections of projector rays corresponding to one or more of the plurality of pattern features and camera rays corresponding to the one or more image features in three-dimensional (3D) space based on calibration data that associates the camera rays corresponding to pixels on the camera sensor of each of the two or more cameras to the projector rays.

    AUTOMATIC CALIBRATION OF INTRAORAL 3D SCANNER
    8.
    发明公开
    AUTOMATIC CALIBRATION OF INTRAORAL 3D SCANNER 审中-公开

    公开(公告)号：US20240163413A1

    公开(公告)日：2024-05-16

    申请号：US18418209

    申请日：2024-01-19

    Applicant: Align Technology, Inc.

    Inventor： Ofer Saphier ,  Tal Levy ,  Gal Peleg ,  Eliran Dafna ,  Sergei Ozerov ,  Tal Verker ,  Nir Makmel ,  Yossef Atiya

    IPC: H04N13/204 ,  G01B11/25 ,  G06T7/521 ,  H04N1/00

    CPC classification number: H04N13/204 ,  G01B11/25 ,  G06T7/521 ,  H04N1/00018

    Abstract: An intraoral scanner comprises one or more structured light projectors and two or more cameras, where each structured light projector projects a pattern of light onto an intraoral three-dimensional (3D) surface and the two or more cameras capture one or more sets of images, wherein each image includes at least a portion of the projected pattern of light. A processor solves a correspondence problem within a set of images of the one or more sets of images such that points in 3D space are determined based on correspondence of captured features in the set of images to projected features of at least the portion of the projected pattern, wherein said points in 3D space form a solution to the correspondence problem. The processor calibrates the intraoral scanner by performing an adjustment to stored calibration data associated with the intraoral scanner based on the solution to the correspondence problem.

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