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AssigneeDegudent GmbH
InventorsKarl Stock, Michael Zint, Rainer Graser, Raimund Hibst
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Method for measuring the shape of a section of a semi-transparent object such as one section of a tooth, using a light source for generating light with a broadband spectrum in a device for generating a multifocal illumination pattern, a lens with a large chromatic aberration for imaging foci of the illumination pattern onto the object, and a detection device for determining the wavelength spectra of the foci confocally imaged onto the object via the lens, wherein a spectral peak position of each focus is determined from the respective wavelength spectrum, from which position the extent of the object in the direction of the imaging beam (Z coordinate) is calculated.
A method for measuring the shape of at least a section of an object (8), in particular of a semi-transparent object such as at least a section of a tooth, using at least one light source to generate light with preferably a broad-band spectrum, a device to generate a multi-focus illumination pattern, an objective lens with high chromatic aberration to image the foci of the illumination pattern onto the object, and a detector unit to determine the wavelength spectra of the foci imaged confocally onto the object by the objective lens, whereby for each focus the spectral peak position of each focus is determined from the corresponding wavelength spectrum, from which the spatial extent of the object along the direction of the imaging beam (z coordinate) is computed, whereby the multi-focal illumination pattern is generated by light guides that are arranged between the light source and the objective lens with high chromatic aberration, whereby the object lens images the ends of the light guides on the objective side onto the object and images light returned by the object onto the ends of the light guides on the object side, and whereby returned light that is conducted through the light guides is directed onto the detector device,
A measuring arrangement for the three-dimensional measuring of at least part of an object, in particular of a semi-transparent object, such as a tooth or section thereof, comprising a light source with a continuous in particular wide-band spectrum, a device to generate a multi-focus illumination pattern, an objective lens with high chromatic aberration to image foci of the illumination pattern onto the object, a detector unit, such as a camera chip, to determine the wavelength spectra of the foci imaged onto the object by the objective lens, as well as a spectrum-dispersing device, onto which light returning from the object can be imaged, whereby arranged between the light source and the objective lens are light guides, which generate the illumination pattern and possess ends on the object side that are arranged in an imaging plane or range of imaging planes of the objective lens, whereby between the ends of the light guides on the illumination side and the detector device is arranged a deviating device for the light emerging from the light guide and the light returning from the object,
Dependencies are inferred from the claim text.