• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A device for three-dimensional recording of objects (10), in particular teeth, has a receiving area (2), in which at least one mirror (26, 27, 28) for deflecting a light or projection beam (23) and / or one of the object ( 10) of the reflected image, and a grip area (3). A camera (32) and / or a projector (14) is / are arranged in the receiving area (2) and the receiving area (2) is opposite to the projection direction at an angle (a) between 10 ° and 40 ° relative to the grip area (3). inclined.
    公开号:AT510554A4
    申请号:T388/2011
    申请日:2011-03-18
    公开日:2012-05-15
    发明作者:
    申请人:A Tron3D Gmbh；Ait Austrian Inst Technology；
    IPC主号:
    专利说明:

    The invention relates to a device for recording images of three-dimensional objects, in particular teeth, with a recording area in which at least one mirror for deflecting a light or projection beam and / or an image reflected by the object is arranged, and with a grip area.
    Such devices are used in particular in the field of three-dimensional recording of teeth. The scope of application extends to the acquisition of digital dental impressions and jaw impressions, assistance with the diagnosis, the monitoring of dental treatments and the reliable control of implants used. In addition to other applications in the field of medical and industrial technology, for example in the field of endoscopy, objects can generally be measured stereometrically, which are difficult to access.
    From the prior art, for example the AT 508 563 B, an apparatus and a method for measuring objects such as teeth are already known, which provide three-dimensional images. These but also other known devices and methods can be used in the present invention to produce three-dimensional images.
    A major disadvantage of known devices is that the recording devices (hand-held scanner), which are for the objects to be imaged, usually bulky, bulky and geometrically not shaped for efficient guidance in the mouth of the patient.
    The object of the invention is therefore to provide a device which is easy to handle and allows an efficient measurement in the mouth.
    This object is achieved in a device of the type mentioned above in that a camera and / or a projector is / are arranged in the receiving area and that the z: ♦ * • * • ·
    Receiving area is inclined against the projection direction by an angle between 10 ° and 40 ° relative to the handle area.
    Due to the angling of the receiving area against the projection direction by an angle between 10e and 40 ° relative to the grip area, the view of the person using the device on the object to be recorded is no longer hindered by the handpiece or the hand holding the handpiece, resulting in a more efficient reception of Objects even in confined areas easier.
    Preferred embodiments of the invention are subject of the dependent claims.
    Further features and advantages of the invention will become apparent from the following description of preferred embodiments of the invention with reference to the accompanying drawings.
    It shows:
    1 shows an embodiment of a handpiece for the invention from the side,
    2 shows the handpiece of Fig. 1 in plan view,
    Fig. 3 shows the handpiece of Fig. 1 from the front
    4 shows the handpiece of FIGS. 1 to 3 in oblique view,
    Fig. 5 is a partial exploded view of a
    Embodiment of the invention,
    6 shows a longitudinal section through the embodiment of FIG. 5, FIG. 7 shows a detail of FIG. 6, FIG.
    Fig. 8 is a section through the device along the line VIII-VIII and
    9 shows a detail of an embodiment of a projector.
    In the drawings, a preferred embodiment of a device 1 for three-dimensional recording of objects 10, in particular teeth is shown, which has a receiving area 2 and a handle portion 3. Between receiving area 2 and handle area 3, a central area 5 is arranged in the illustrated embodiment. Since the middle area 5 smaller
    Outside dimensions than the receiving area 2, the receiving area 2 has a substantially conical transition region 6 to the central region 5 out. At the front end 4 of the receiving area 2 is rounded.
    The receiving region 2 has a central axis 7, the handle portion 3 of the central axis 8 and the central region 5 a central axis 9. The angle α between the central axis 7 and the central axis 8 according to the invention between 10 ° and 40 °, said this angle α in the illustrated Embodiment (with a central region 5) divided into two angles ß and γ, wherein the angle ß between the central axis 7 of the receiving part 2 and the central axis 9 of the central region 5 and the angle γ between the central axis 9 of the central region 5 and the central axis 8 of Handle part 3 is located. The angle β is preferably between 3 ° and 15 ° and the angle γ between 7 ° and 25 °. The length of the receiving area is preferably between 10 and 60 mm, since within these limits, both a good handling of the handpiece 1 and sufficient space for accommodating the projection and / or recording technique is available.
    On its side facing the male object 10, an opening 12 (FIG. 5) is arranged in the receiving part 2, which is closed by a disc 13. By means of this disk 13, light, in particular a random pattern, can be directed onto the object 10 with a projector 14 and images of the object 10 can be taken with a camera system 15. The receiving area 2 is thus inclined relative to the handle 3 by an angle α between 10 ° and 40 ° counter to the direction of projection to the rear.
    FIGS. 5 to 8 show an embodiment of the invention in which the projector 14 emits a light beam 23 with a light source. The light beam 23 passes through one or more transparent supports 36, 37 shown in FIG. 9, for example slides, on which a randomly arranged pattern is arranged. The pattern preferably consists of substantially randomly distributed, possibly irregularly shaped dots and / or lines, which are subsequently projected onto the object 10, for example a tooth.
    In the beam path of the light beam 23 is a deflection mirror 26, which deflects a portion 23a of the light beam 23, in the embodiment of Fig. 7 the lowest part, to a first mirror 27, which directs the light on the object 10 subsequently. Another part 23b of the light beam 23, in the exemplary embodiment of FIG. 7 the middle part, strikes directly on a second mirror 28, from which the light is likewise directed onto the object 10.
    The deflection mirror 26 is preferably a plane mirror, but could also be a convex or concave curved mirror if required. The two mirrors 27 and 28 are preferably biaxially convexly curved mirrors with identical or different radii of curvature in the two axes, with which the respective portion of the radiation beam 23 can be scattered more strongly as required.
    In the illustrated embodiment, the arrangement and curvature of the deflecting mirror 26 and the first mirror 27 is selected so that the part 23a of the light beam 23 in the image plane of the drawing has an opening angle δ of about 30 °. The arrangement and curvature of the second mirror 28 is chosen by way of example so that the part 23b of the light beam 23 in the image plane of the drawing has an opening angle ε of about 25 °. The opening angle of the parts 23a, 23b of the light beam 23 in the direction normal to the image plane of the drawing can, by suitable curvature of the mirrors 27, 28 be equal to or different from the respective opening angle δ, ε lying in the image plane.
    Due to the arrangement of the mirrors 27, 28 exemplarily selected in FIG. 7, their optical axes 29, 30 are inclined relative to one another in such a way that the light beam parts 23a, 23b are made of different ones
    To hit directions on object 10.
    In the projection direction of the projector 14 seen between the two mirrors 27, 28, slightly closer to the second mirror 28 in the illustrated embodiment, a camera system 15 is arranged, which consists in the illustrated embodiment of two cameras 32 which record stereoscopic images for three-dimensional measurement of the object 10 by capturing images from different directions with overlapping shot areas. The two optical axes 29, 30 of the mirrors 27, 28 span a plane ω, the two cameras 32, more precisely their lenses 33, lying symmetrically on both sides of this plane ω.
    By this preferred arrangement, the camera system 15 with the mirrors 26, 27 and their optical axes 29, 30 in a plane ω, which allows a very precise image acquisition and thus measurement of the object. By projecting the light bundle parts 23a, 23b through mirrors 26, 27 which lie on both sides of the camera system 15, an illumination or projection of the random pattern on the object 10 takes place from two sides in this plane ω, whereby - from the viewpoint of the camera system 15, shadows or imperfections on the object 10, which can occur, for example, in molars or incisors, can be avoided very reliably.
    In principle, it would also be possible to position the mirrors - viewed from the projector 14 - next to the two cameras 32 and if necessary to rotate the two cameras 32 by 90 ° so that they both lie in the plane ω. There are also more than two mirrors, both before and / or behind and laterally of the cameras 32 conceivable to obtain the best possible illumination or pattern projection on the object 10.
    In the exemplary embodiment shown, an aperture 34 is arranged in the region above the deflecting mirror 26, which has a third aperture.
    • ♦ • ♦ ♦ ♦ ♦ ♦ ♦ ♦ ♦ ♦ ♦
    Part 23c of the light beam 23 is blocked so that it does not cause unwanted reflections in the optics 33 of the cameras 32 * Depending on the arrangement of the mirrors 26, 27, 28 and the lenses 33, the diaphragm 34 may also be omitted or arranged or shaped differently.
    All the mirrors 26, 27, 28, the diaphragm 34 and optionally also the camera system 15 can be adjustably fastened to corresponding holders 31 so that, if required, simple adjustment and / or calibration of the individual components is possible. In addition, all or even a portion of the components described above may be mounted and preset on a carrier system which may then be inserted into a recorder. The housing of the device 1 preferably consists of two housing halves 16, 17, which are designed mirror-symmetrically, whereby the device can be very easily assembled together.
    By the selected and shown by way of example in the drawing arrangement according to the invention a very compact and slim design is possible, which can for example be very well integrated into a handpiece for three-dimensional recording of teeth.
    Preferably, the arrangement of the mirrors and cameras described in connection with FIGS. 5 to 8 is used for handpieces with an angled receiving area 2 and optionally central area 5, since a particularly good possibility is offered by the mirrors 26, 27, 28 To incorporate the entire projection and recording technique in an angled handpiece 1, which is very slim and is particularly easy to handle due to the kink, especially with oral scanners.
    With the device according to the invention, an optimal degree of sharpness can already be achieved directly from the outer surface of the scanner glass 13 without the risk of shadows or imperfections, in order to be able to rest on an object, e.g. a tooth that can already be measured * * 7 * t ♦ · · · · · · · · · · • • • • • • • • 9 9 9 9 9 9 9 ··· Whereas "known scanners often have to be kept at a certain distance from the teeth, which makes the recording process, in comparison to the possibility according to the invention, also possible to place directly on the teeth, significantly more difficult.
    FIG. 9 schematically shows an embodiment of the invention in which two transparent carriers 36, 37, for example two slides, on which randomly arranged patterns are arranged, lie in the beam path of a light beam 23 coming from a light source 22, for example one LED is broadcast. The pattern may consist essentially of randomly distributed, possibly irregularly shaped, dots and / or lines. The light passes in the illustrated embodiment first through a lens 35, then through the two carriers 36, 37, and subsequently through a symbolically represented by a lens 38 further lens system which serves to align the projection beam 23 and focus adjustment.
    The projector 14 of FIG. 9 can be used, for example, in a device shown in FIGS. 5 to 8, in which the light beam 23 is directed onto an object 10 via two mirrors 27 and 28. Since the light covers paths of different lengths, depending on whether it hits the object 10 either via the deflecting mirror 26 and the mirror 27 or via the mirror 28, blurring of the one can occur when the pattern on a support is projected onto the object 10 or other or both projections.
    Through the use of two carriers 36, 37 can be taken into account and blurring can be compensated individually. This can be done, for example, that the two carriers 36, 37 are offset in the direction of propagation of the light to each other. This is e.g. the carrier 36, which lies in the beam path of the light beam 23b of the mirror 28, farther away from the lens 38 and a subsequent lens system than the carrier 37, which lies in the beam path of the light beam 23a of the mirror 27, so that the total path «· · · · · · · · · · · · · · · · · · * * 37 about the respective mirror 26, 27, 28 to the object 10 is again approximately the same length. Decisive are the different distances of the carriers 36, 37 to the lens system 38, since these distances determine the position and position of the focal plane in the measuring space. If the path difference across the respective mirror 26, 27, 28 to the object 10 is not very large, for example, only a single carrier could be used, which either has stepped portions or which is indeed but strongly inclined to to compensate the difference on average. As a further possibility, a single carrier could be used, which is coated on different areas or sections respectively on the front and on the back with a pattern. The thickness of the carrier material then determines the distance difference.
    In Fig. 9, an inclination of the beams 36, 37 to the propagation direction of the light can be seen, i. that the carriers 36, 37 are not exactly at right angles to the propagation direction of the light. This embodiment of the invention is advantageous when the projector 14 or its optical center axis 39 is aligned as in the embodiment shown in FIGS. 1 to 8 at an angle ß greater than 0 ° to the receiving area 2, in particular the optical center axis 39 not is aligned at right angles to the optical center axis 40 of the camera 32. The arrangement of the projector 14 in the angled transition region between the receiving area 2, in which the cameras are 32, and the central area 5 is particularly advantageous, since in this way the receiving area 2 can be kept relatively short, which significantly improves the handling of the handpiece 1 , Due to the inclination of the carrier 36, 37 caused by the inclination of the projector 14 blurring of projected onto the object 10 pattern can be compensated.
    权利要求:
    Claims (18)
    [1]
    Claims 1. An apparatus for capturing images of three-dimensional objects (10), in particular Teeth, with a receiving region (2) in which at least one mirror (26, 27, 28) for deflecting a light or projection beam (23) and / or an object (10) reflected image is arranged, and with a handle region ( 3), characterized in that a camera (32) and / or a projector (14) in the receiving area (2) is / are arranged and that the receiving area (2) against the projection direction by an angle (ck) between 10 ° and 40 ° is inclined relative to the grip area (3).
    [2]
    2. Apparatus according to claim 1, characterized in that between the handle region (3) and the receiving region (2), a central region (5) is arranged opposite the handle portion (3) and the receiving area (2) by an angle (ß , γ) is inclined by at least 3 °.
    [3]
    3. Apparatus according to claim 1 or 2, characterized in that the central region (5) relative to the handle region (3) by an angle (γ) of 7 ° to 25 ° is inclined.
    [4]
    4. Device according to one of claims 1 to 3, characterized in that the receiving area (2) relative to the central region (5) by an angle (ß) of 3 ° to 15 ° is inclined.
    [5]
    5. Device according to one of claims 1 to 4, characterized in that the receiving area (2) has a length between 10 mm and 60 mm.
    [6]
    6. Device according to one of claims 1 to 5, characterized in that the receiving area (2) has a housing with a preferably of a transparent disc (13) closed opening (12). 7. A device according to any one of claims 1 to 6, characterized in that... it has a housing with two mirror-symmetrical housing halves (16, 17).
    [7]
    8. Device according to one of claims 1 to 7, characterized in that the projector (14) in the transition region between the receiving area (2) and the adjoining central area (5) or handle portion (3) is arranged.
    [8]
    9. Device according to one of claims 1 to 8, characterized in that at least two mirrors (27, 28) each reflect a light beam (23a, 23b) from the projector (14) from different directions on the object (10).
    [9]
    10. The device according to claim 9, characterized in that a first mirror (27) indirectly via a deflecting mirror (26) and a second mirror (28) directly from the projector (14) is illuminated.
    [10]
    11. Device according to one of claims 9 or 10, characterized in that two mirrors (27, 28) lie on different sides of the camera (32).
    [11]
    12. Device according to one of claims 1 to 11, characterized by two cameras (32) with intersecting recording areas, which receive images from different directions.
    [12]
    13. Device according to one of claims 1 to 12, characterized in that the projector (14) projects a pattern arranged on a random pattern on the object (10).
    [13]
    14. The apparatus according to claim 13, characterized in that in the beam path of the projector (14) at least one transparent carrier (36, 37) is arranged with the pattern. ·· ···· t * 11 βΛ ·· ♦ * ·· ·· ·· *
    [14]
    15. The apparatus of claim 13 or 14, characterized in that the pattern consists essentially of randomly distributed, optionally irregularly shaped, points and / or lines.
    [15]
    16. The apparatus of claim 14 or 15, characterized in that the carrier (36, 37) has portions which are offset from one another in the direction of the beam path.
    [16]
    17. The apparatus of claim 14 or 15, characterized in that at least two carriers (36, 37) are offset in the direction of the beam path to each other.
    [17]
    18. The apparatus according to claim 17, characterized in that at least one carrier (36, 37) has portions which are offset from each other in the direction of the beam path.
    [18]
    19. Device according to one of claims 14 to 18, characterized in that at least one carrier (36, 37) is inclined with respect to the propagation direction of the light at an angle not equal to 90 °.
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    引用文献:
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    法律状态:
    2018-11-15| MM01| Lapse because of not paying annual fees|Effective date: 20180318 |
    优先权:
    申请号 | 申请日 | 专利标题
    ATA388/2011A|AT510554B1|2011-03-18|2011-03-18|DEVICE FOR TAKING PICTURES OF THREE-DIMENSIONAL OBJECTS|ATA388/2011A| AT510554B1|2011-03-18|2011-03-18|DEVICE FOR TAKING PICTURES OF THREE-DIMENSIONAL OBJECTS|
    KR1020137027439A| KR20140031868A|2011-03-18|2012-03-12|Device for recording images of three-dimensional objects|
    BR112013023797A| BR112013023797A2|2011-03-18|2012-03-12|device for recording images of three-dimensional objects|
    PCT/AT2012/000061| WO2012126022A1|2011-03-18|2012-03-12|Device for recording images of three-dimensional objects|
    EP12714526.6A| EP2686734A1|2011-03-18|2012-03-12|Device for recording images of three-dimensional objects|
    US14/005,840| US20140015928A1|2011-03-18|2012-03-12|Device for recording images of three-dimensional objects|
    JP2013558267A| JP5912141B2|2011-03-18|2012-03-12|Device for recording images of three-dimensional objects|
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