Intraoral scanner that compensates for non-fixed magnification

    公开(公告)号:US11439483B2

    公开(公告)日:2022-09-13

    申请号:US17492453

    申请日:2021-10-01

    Abstract: A system comprises alight source to provide light, an optical system comprises focusing optics to focus the light onto a focal surface, a detector to measure returning light that is reflected off of a three dimensional object, a translation mechanism to displace the focal surface along an imaging axis defined by the optical path, and one or more processor. The one or more processor is to generate measurement data comprising coordinates of a plurality of surface points of the three dimensional object based on the measured returning light; adjust the coordinates of the subset of the plurality of surface points along up to three axes to correct the measurement data so as to remove inaccuracies caused by changes in magnification at the focal surface; and generate a three dimensional model of the three dimensional object using corrected measurement data.

    Apparatus for dental imaging
    25.
    发明授权

    公开(公告)号:US11202574B2

    公开(公告)日:2021-12-21

    申请号:US17191579

    申请日:2021-03-03

    Abstract: An apparatus for dental imaging comprises a light source for generating light, an optics system for focusing the light, and a probe head. The light source, the optics system and the probe head are arranged such that the light passes through the optics system, passes through the probe head, and exits the probe head. The optics system is configured such that, upon entering the probe head, an outermost chief ray of the light with respect to an optical axis of the optics system is divergent to the optical axis and an outermost marginal ray of the light with respect to the optical axis is parallel or divergent to the optical axis.

    Intraoral scanner that compensates for optical inaccuracies

    公开(公告)号:US11135039B2

    公开(公告)日:2021-10-05

    申请号:US17161503

    申请日:2021-01-28

    Abstract: A non-transitory medium includes instructions for generating a three-dimensional virtual model of an intraoral object by receiving surface scan data of the intraoral object while changing a position of at least one lens of focusing optics of an intraoral scanner, wherein the surface scan data comprises data for a plurality of points of the intraoral object, and adjusting the data for one or more of the plurality of points to compensate for one or more inaccuracies associated with at least one of a) different temperatures or b) different positions of the at least one lens. A three-dimensional virtual model of the intraoral object is generated using the adjusted data.

    INTRAORAL SCANNER THAT COMPENSATES FOR OPTICAL INACCURACIES

    公开(公告)号:US20210145551A1

    公开(公告)日:2021-05-20

    申请号:US17161503

    申请日:2021-01-28

    Abstract: A non-transitory medium includes instructions for generating a three-dimensional virtual model of an intraoral object by receiving surface scan data of the intraoral object while changing a position of at least one lens of focusing optics of an intraoral scanner, wherein the surface scan data comprises data for a plurality of points of the intraoral object, and adjusting the data for one or more of the plurality of points to compensate for one or more inaccuracies associated with at least one of a) different temperatures or b) different positions of the at least one lens. A three-dimensional virtual model of the intraoral object is generated using the adjusted data.

    Calibration of an intraoral scanner

    公开(公告)号:US10952827B2

    公开(公告)日:2021-03-23

    申请号:US16823156

    申请日:2020-03-18

    Abstract: A method of generating a three-dimensional virtual model of an intraoral object includes capturing, by an intraoral scanner for performing intraoral scans, surface scan data of the intraoral object while changing a position of at least one lens of focusing optics of the intraoral scanner, wherein the surface scan data comprises depth data for a plurality of points of the intraoral object. The method further includes adjusting the depth data for one or more of the plurality of points based at least in part on a value associated with a temperature of at least a portion of the imaging apparatus. The method further includes generating the three-dimensional virtual model of the intraoral object using the adjusted depth data.

    Compact confocal dental scanning apparatus

    公开(公告)号:US10918286B2

    公开(公告)日:2021-02-16

    申请号:US16586744

    申请日:2019-09-27

    Abstract: Described herein are apparatuses for dental scanning and components of apparatuses for dental scanning. A component of a dental scanning apparatus may include a beam splitter, a transparency and an image sensor. The component may have a first surface and a second surface. The transparency may be affixed to the first surface of the beam splitter, and may comprise a spatial pattern disposed thereon and be configured to be illuminated by a light source of the dental scanning apparatus. The image sensor may be affixed to the second surface of the beam splitter, wherein as a result of the transparency being affixed to the first surface of the beam splitter and the image sensor being affixed to the second surface of the beam splitter, the image sensor maintains a stable relative position to the spatial pattern of the transparency.

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