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    3D-DENTALKAMERA ZUR ERFASSUNG VON OBERFLÄCHENSTRUKTUREN EINES MESSOBJEKTS MITTELS TRIANGULATION
    2.
    发明公开
    3D-DENTALKAMERA ZUR ERFASSUNG VON OBERFLÄCHENSTRUKTUREN EINES MESSOBJEKTS MITTELS TRIANGULATION 审中-公开
    3D DENTAL相机被测物体记录表面结构通过三角测量来

    公开(公告)号：EP2309948A1

    公开(公告)日：2011-04-20

    申请号：EP09781389.3

    申请日：2009-08-03

    申请人： Sirona Dental Systems GmbH

    发明人： SCHMIDT, Volker

    IPC分类号： A61C19/04 ,  G01B11/25

    CPC分类号： G01B11/25 ,  A61C9/0053 ,  A61C19/04

    摘要： The invention relates to a 3D dental camera for recording surface structures of a measuring object (2) by means of triangulation, said camera comprising a light source (3) for producing an illumination beam (7.1, 7.2, 7.3), means for focusing the illumination beam (7.1, 7.2, 7.3) onto the surface of the measuring object, an image sensor (6) for receiving an illumination beam (7.1, 7.2, 7.3) reflected by the surface of the measuring object (2) in the form of an observation beam (9.1, 9.2, 9.3), and means (5) for focusing the observation beam (9.1, 9.2, 9.3) onto the image sensor (6). The light source (3) is split into a plurality of regions (3.1, 3.2, 3.3) that can be independently regulated in terms of the light intensity thereof, in such a way that a light centre position (10.1, 10.2, 10.3) of the illumination beam (7.1, 7.2, 7.3) changes in at least two switching modes.

    CAMERA FOR RECORDING SURFACE STRUCTURES, SUCH AS FOR DENTAL PURPOSES
    3.
    发明公开
    CAMERA FOR RECORDING SURFACE STRUCTURES, SUCH AS FOR DENTAL PURPOSES 有权
    照相机记录表面结构，如牙科的

    公开(公告)号：EP2375967A1

    公开(公告)日：2011-10-19

    申请号：EP09805923.1

    申请日：2009-12-18

    申请人： Sirona Dental Systems GmbH

    发明人： SCHWOTZER, Axel ,  SCHMIDT, Volker

    IPC分类号： A61B5/00 ,  A61B1/24

    CPC分类号： A61C9/006 ,  A61B1/00163 ,  A61B1/00193 ,  A61B1/04 ,  A61B1/0646 ,  A61B1/0669 ,  A61B1/24 ,  A61B5/0084 ,  A61B5/4547 ,  A61C1/088

    摘要： A 3-D camera for obtaining an image of at least one surface of at least one object 1(14)1. The camera comprises a light source (3), arranged to illuminate the object, wherein a light beam emitted from the light source defines a projection optical path. The camera also includes at least one first aperture (9a, 21a) having a first predetermined size, interposed in the projection optical path such that the light beam passes through it. An image sensor receives light back-scattered by the object, the back-scattered light defining an observation optical path. At least one second aperture (9b, 21b) having a second predetermined size, is interposed in the observation optical path such that the back- scattered light passes through it. In one example embodiment of the invention, the first predetermined size is greater than the second predetermined size, and at least one optic is arranged in both the projection and observation optical paths.

    OBJEKTIV FÜR EINE DENTALKAMERA UND VERFAHREN ZUR ERSTELLUNG EINER AUFNAHME
    4.
    发明公开
    OBJEKTIV FÜR EINE DENTALKAMERA UND VERFAHREN ZUR ERSTELLUNG EINER AUFNAHME 有权
    DENTALKAMERA

    公开(公告)号：EP2310897A2

    公开(公告)日：2011-04-20

    申请号：EP09781392.7

    申请日：2009-08-03

    申请人： Sirona Dental Systems GmbH

    发明人： SCHMIDT, Volker

    IPC分类号： G02B27/00 ,  A61B1/247 ,  G02B13/22 ,  G02B23/24 ,  G06T5/00

    CPC分类号： G02B27/0018 ,  A61B1/00188 ,  A61B1/0615 ,  A61B1/0669 ,  A61B1/247 ,  G02B13/22 ,  G02B23/243 ,  G06T5/006

    摘要： The invention relates to an objective (4) and a method for designing said objective (4) for a dental camera (1), the objective (4) comprising at least two lenses (9, 10, 20, 21) and the dental camera (1) comprising a light source (3) and an image sensor (7). An illumination beam emitted by the light source (3) is focused by the objective (4), imaged onto an object (8) to be measured, and reflected by the measuring object (8) as an observation beam (12). The observation beam (12) penetrates the objective (4) and is oriented towards the image sensor (7), the illumination beam (11) being partially reflected by surfaces (9', 9', 9'', 10', 10", 20', 20", 21', 21") of the lenses (9, 10, 20, 21) as reflection beams (17.1 to 17.8). The objective (4) comprises means (27) for tilting each lens (9, 10, 20, 21) towards the illumination beam (11) in such a way that an optical axis (9'", 10'", 15.1, 15.2) of each lens (9, 10, 20, 21) forms a tilting angle (α) with the illumination beam (11), the size of the angle being selected in such a way that the reflection beams (17.1 bis 17.8) can be reflected in a direction outside a pupil of the observation beam (12).