摘要:
The invention relates to an apparatus and a method for optical 3D measurement, comprising a first beam deflector for deflecting an illuminating beam onto a measurement object and for deflecting the observation beam which is radiated back by the measurement object, wherein the first beam deflector can move along a path distance S.
摘要:
The invention relates to a method and a device for operating an optical transmitting device having a plurality of optical transmitters that can be driven independently. The method includes detecting the parameter values of the individual transmitters, comparing the parameter values determined with one another and/or with a prescribed comparison value, and selecting one of the transmitters for the communication operation of the transmitting device based on the comparison. The method further includes operating the transmitting device with the selected transmitter.
摘要:
A system, apparatus, method, and computer program product for evaluating an object disposed on an upper surface of an object holder. At least one first frame representing a captured portion of the object is acquired, while the object holder is positioned at each of a plurality of locations. At least one second frame representing a captured portion of at least one other surface of the object holder besides the upper surface is acquired, while the object holder is positioned at each of the plurality of locations. At least one spatial characteristic associated with the captured portion of the object is determined, based on at least one of the acquired frames. A three-dimensional representation of the object can be formed based on the first frames and at least one spatial characteristic.
摘要:
In the production of a dental prosthetic item, which dental prosthetic item comprises an at least single-membered framework, as a first component, which framework has an exterior surface to be faced by a veneer, veneering is carried out using a separately produced veneer shell, as a further component, which, optionally with the interposition of further components, has a mating surface for attachment thereof to said exterior surface of said framework and is attached to said framework. Furthermore, a dental prosthetic item produced by the aforementioned method, a component for such a dental prosthetic item, and a blank for the fabrication of such a dental prosthetic item are claimed.
摘要:
The invention relates to a method for the optical three-dimensional measurement of a dental object, wherein a first region of the dental object is measured using a first optical three-dimensional measurement method, wherein the first optical three-dimensional measurement method is based on a triangulation method and on a fringe projection method. According to the invention, a powdering occurs at least on the first region, wherein first image data are generated. Using a less precise, second optical three-dimensional measurement method, a second region of the dental object is subsequently measured without previous powdering, wherein second image data are generated. Afterwards, the first image data are combined with the second image data to form an overlapping three-dimensional exposure.
摘要:
A method for recording an image of an object includes projecting a strip pattern onto the object, recording the projected strip pattern as raw image data using a camera, and calculating an image of the object from the raw image data. A strip pattern having a duty cycle of less than 1 can be used to increase measuring precision during measurement of a translucent object, and can eliminate a need for additional contrast agents for a recording of the object.
摘要:
The invention relates to an apparatus and a method for optical 3 D measurement, comprising a first beam deflector for deflecting an illuminating beam onto a measurement object and for deflecting the observation beam which is radiated back by the measurement object, wherein the first beam deflector can move along a path distance S.
摘要:
The invention relates to a measuring device and a method based on a confocal microscopy principle. The inventive device comprises a light source (1), a diaphragm unit (3) for limiting a beam, an imagine optical system (4) for focusing the light (5) which is irradiated by said source on a measurable object (6) and passes through said diaphragm unit. Said device also comprises an optical system (10) for receiving the light (5) reflected from the object and passing through said optical system or another diaphragm unit disposed in an observation beam (7) and an image receiver (10) which is provided with at least two radiation-sensitive sensor elements (13, 14) (pixel). Said invention is characterised in that, in order to obtain the image of an altitude information-containing measurement, the device is also provided with means (11) for modifying the beam optical path length disposed between the light source (1) and/or the image receiver (10), on one side, and the object (6) on the other and the optical distance (d) of a focal point is modifiable in a predetermined manner. In addition, said intention makes it possible to influence the dependence of an accumulation of charges (Q13, Q14) in at least two sensor elements (13, 14) on the light intensity of the observation beam (7) during the exposure time in such a way that a correlation associated with the optical distance (d) of an image plane can be carried out by the imagine optical system (4), thereby making it possible to reconstitute the altitude co-ordinate (zs) of the object by distributing the intensity values obtained during the exposure time from at least two sensor elements (13, 14).
摘要:
A blank for producing a formed dental part has closely toleranced reference faces being arranged at one end of a blank member lying opposite a retainer projection. The reference faces comprise two surfaces lying opposite one another that have a defined spacing from one another with close tolerances. The surfaces are advantageously formed by a reference part with a cylindrical cross section that is secured onto the blank member.
摘要:
A dental 3D camera for optically scanning a three-dimensional object, and a method for operating a dental 3D camera. The camera operates in accordance with a triangulation procedure to acquire a plurality of images of the object. The method comprises forming at least one comparative signal based on at least two images of the object acquired by the camera while at least one pattern is projected on the object, and determining at least one camera shake index based on the at least one comparative signal.