| 摘要 |
Method for measuring the shape of at least one section of an object (8), in particular a semi-transparent object such as at least one section of a tooth, using a light source (1) for generating light with preferably a broadband spectrum in a device (3) for generating a multifocal illumination pattern, a lens (6) with a large chromatic aberration for imaging foci of the illumination pattern onto the object, and a detection device (12) 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, wherein the multifocal illumination pattern is formed via optical waveguides (5) arranged between the light source (1) and the lens (6) with a large chromatic aberration, wherein the lens (6) images object-side ends of the optical waveguides onto the object and images light remitted by the object onto the object-side ends of the optical waveguides, and wherein light guided and remitted by the optical waveguides is guided to the detection device (12). In order to make it possible to carry out highly accurate measurements with structurally simple measures, wherein the intention is to enable both the best possible distribution of measuring points on the sample and optimum spectrum distribution in the detection device, provision is made for the object-side illumination pattern to be formed via the optical waveguides (5) in such a manner that an object-side distribution of measuring points is independent of an illumination-side and detection-side microlens or pinhole distribution. |
