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    Intraoral scanning apparatus
    22.
    发明授权
    Intraoral scanning apparatus 有权

    公开(公告)号：US11622102B2

    公开(公告)日：2023-04-04

    申请号：US17340806

    申请日：2021-06-07

    Applicant: 3SHAPE A/S

    Inventor： Rune Fisker ,  Henrik Öjelund ,  Rasmus Kjaer ,  Mike Van Der Poel ,  Arish A. Qazi ,  Karl-Josef Hollenbeck

    IPC: H04N13/296 ,  A61B5/00 ,  G01B11/25 ,  A61B5/107

    Abstract: A scanner includes a camera, a light source for generating a probe light incorporating a spatial pattern, an optical system for transmitting the probe light towards the object and for transmitting at least a part of the light returned from the object to the camera, a focus element within the optical system for varying a position of a focus plane of the spatial pattern on the object, unit for obtaining at least one image from said array of sensor elements, unit for evaluating a correlation measure at each focus plane position between at least one image pixel and a weight function, a processor for determining the in-focus position(s) of each of a plurality of image pixels for a range of focus plane positions, or each of a plurality of groups of image pixels for a range of focus plane positions, and transforming in-focus data into 3D real world coordinates.

    Focus scanning apparatus
    24.
    发明授权
    Focus scanning apparatus 有权

    公开(公告)号：US10595010B2

    公开(公告)日：2020-03-17

    申请号：US16433369

    申请日：2019-06-06

    Applicant: 3SHAPE A/S

    Inventor： Rune Fisker ,  Henrik Ôjelund ,  Rasmus Kjær ,  Mike van der Poel ,  Arish A. Qazi ,  Karl-Josef Hollenbeck

    IPC: H04N13/296 ,  A61B5/00 ,  G01B11/25 ,  A61B5/107

    Abstract: A scanner includes a camera, a light source for generating a probe light incorporating a spatial pattern, an optical system for transmitting the probe light towards the object and for transmitting at least a part of the light returned from the object to the camera, a focus element within the optical system for varying a position of a focus plane of the spatial pattern on the object, unit for obtaining at least one image from said array of sensor elements, unit for evaluating a correlation measure at each focus plane position between at least one image pixel and a weight function, a processor for determining the in-focus position(s) of each of a plurality of image pixels for a range of focus plane positions, or each of a plurality of groups of image pixels for a range of focus plane positions, and transforming in-focus data into 3D real world coordinates.

    SELECTIVE AMPLIFICATION OF OPTICAL COHERENCE TOMOGRAPHY SIGNALS
    26.
    发明申请
    SELECTIVE AMPLIFICATION OF OPTICAL COHERENCE TOMOGRAPHY SIGNALS 审中-公开

    公开(公告)号：US20190017805A1

    公开(公告)日：2019-01-17

    申请号：US16136426

    申请日：2018-09-20

    Applicant: 3SHAPE A/S

    Inventor： Karl-Josef Hollenbeck ,  Onur Kaya ,  Ashwani Kumard

    IPC: G01B9/02

    Abstract: Presented is an optical coherence tomography system and method to increase imaging depth of optical coherence tomography (OCT) by selective amplification. In a swept-source OCT system with periodically linear wavenumber-vs-time characteristic, the signal in principle is summation of various sinusoidal signals with different frequencies. Each frequency component of the recorded signal carries reflectivity information for a certain depth of the analyzed object. At greater depth inside the analyzed object, the reflectivity information is generally weak due absorption and scattering. An analog or digital electronic circuit selectively filters and amplifies frequencies above some threshold, possibly up to another threshold. In this way, even small signals for relatively larger depths become detectable.

    ENCODER FOR OPTICAL COHERENCE TOMOGRAPHY SCANNER
    27.
    发明申请
    ENCODER FOR OPTICAL COHERENCE TOMOGRAPHY SCANNER 审中-公开

    公开(公告)号：US20190011250A1

    公开(公告)日：2019-01-10

    申请号：US16067337

    申请日：2017-01-20

    Applicant: 3SHAPE A/S

    Inventor： Ashwani Kumar ,  Deepak Vijayakumar Nair ,  Erik Ask ,  Karl-Josef Hollenbeck

    IPC: G01B9/02 ,  G06T5/00

    Abstract: Disclosed is an optical coherence tomography scanner and a method for recording sub-surface scans of an object, wherein a position encoder is arranged in the path of the probing beam of an interferometric system. The encoder pattern is detected in a sequence of A scans at generated for different probing beam positions on the scanned object, the probing beam position and/or inclination for at least one A scan of said sequence of A scans is deducing based on the detected encoder pattern, and the sub-surface scan of the object is generated based on the sequence of A scans taking into account the deduced probing beam position and/or inclination.

    Selective amplification of optical coherence tomography signals
    28.
    发明授权
    Selective amplification of optical coherence tomography signals 有权

    公开(公告)号：US10113857B2

    公开(公告)日：2018-10-30

    申请号：US15054745

    申请日：2016-02-26

    Applicant: 3SHAPE A/S

    Inventor： Karl-Josef Hollenbeck ,  Onur Kaya ,  Ashwani Kumard

    IPC: G01B9/02

    Abstract: Presented is an optical coherence tomography system and method to increase imaging depth of optical coherence tomography (OCT) by selective amplification. In a swept-source OCT system with periodically linear wavenumber-vs-time characteristic, the signal in principle is summation of various sinusoidal signals with different frequencies. Each frequency component of the recorded signal carries reflectivity information for a certain depth of the analyzed object. At greater depth inside the analyzed object, the reflectivity information is generally weak due absorption and scattering. An analog or digital electronic circuit selectively filters and amplifies frequencies above some threshold, possibly up to another threshold. In this way, even small signals for relatively larger depths become detectable.

    FOCUS SCANNING APPARATUS
    29.
    发明申请
    FOCUS SCANNING APPARATUS 审中-公开
    聚焦扫描仪

    公开(公告)号：US20150054922A1

    公开(公告)日：2015-02-26

    申请号：US14502230

    申请日：2014-09-30

    Applicant: 3SHAPE A/S

    Inventor： Rune FISKER ,  Henrik Öjelund ,  Rasmus Kjær ,  Mike Van Der Poel ,  Arish A. Qazi ,  Karl-Josef Hollenbeck

    IPC: H04N13/02 ,  A61B5/00 ,  A61B5/107 ,  G01B11/25

    CPC classification number: H04N13/296 ,  A61B5/0068 ,  A61B5/1075 ,  A61B5/1076 ,  A61B5/1077 ,  A61B5/4547 ,  G01B11/2513 ,  G01B11/2518 ,  G01B2210/58

    Abstract: A scanner includes a camera, a light source for generating a probe light incorporating a spatial pattern, an optical system for transmitting the probe light towards the object and for transmitting at least a part of the light returned from the object to the camera, a focus element within the optical system for varying a position of a focus plane of the spatial pattern on the object, unit for obtaining at least one image from said array of sensor elements, unit for evaluating a correlation measure at each focus plane position between at least one image pixel and a weight function, a processor for determining the in-focus position(s) of each of a plurality of image pixels for a range of focus plane positions, or each of a plurality of groups of image pixels for a range of focus plane positions, and transforming in-focus data into 3D real world coordinates.

    Abstract translation: 扫描器包括相机，用于产生包含空间图案的探测光的光源，用于将探测光发送到物体并用于将从物体返回的光的至少一部分传输到相机的光学系统，焦点 在所述光学系统内用于改变所述物体上的空间图案的聚焦平面的位置的单元，用于从所述传感器元件阵列获得至少一个图像，用于评估在至少一个 图像像素和加权函数的处理器，用于针对焦距平面位置的范围确定多个图像像素中的每一个的对焦位置的处理器或用于焦距范围的多组图像像素中的每一个 平面位置，并将对焦数据转换为3D现实世界坐标。

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