Abstract: In a method for concretizing a substrate with a code (1, 2) which is applied at least twice by a code reader, the codes (1, 2) are intended to be assigned or matched to one another, this being suitable for restoring an intact code (1, 2) from at least two codes (1, 2) which are not intact per se.

Abstract: In a method for concretizing a substrate with a code (1, 2) which is applied at least twice by a code reader, the codes (1, 2) are intended to be assigned or matched to one another, this being suitable for restoring an intact code (1, 2) from at least two codes (1, 2) which are not intact per se.

Abstract: A method for the optical three dimensional measurement of a tooth without calibration bodies. An optical projection system projects a pattern onto a tooth, and an optical imaging system images the pattern projected thereon, from a first position in space and subsequently from a second position in space, with the images from the two positions in space having a common imaged area of the tooth. The image patterns are evaluated to calculate three dimensional coordinate data of the tooth surface relative to the respective imaging position for each image and also for the two images combined, to produce a single three dimensional tooth surface data record. In this method, points and/or surfaces are selected from the common imaged area with the aid of properties of the tooth surface contour which are invariant under displacement and rotation, so that they can be clearly correlated with each other.

Abstract: 3D tooth measurement by means of an optical probe wherein a prior matting treatment of the tooth to be measured can be dispensed with. The consequential reflection-dependent measuring errors are compensated by an error correction method.

Abstract: An optical oral or mouth probe which is utilized for the three-dimensional measurement or surveying of teeth possesses a highly-resoluting two-dimensional point-by-point freely-programmable projection unit, which generates a digitalized projection pattern from a computer in accordance with a programmed mathematical or graphical method, deposits the pattern in an image storage and is then brought into display through addressing of an LCD matrix plate, and with the aid of a focusing optic is then projected onto the surface which is to be surveyed or measured.

Abstract: The invention relates to a method for optical measurement of objects, in particular teeth, with a projector, with beam path diverging from a projector central point, imaging on the object a pattern of different ranges of brightness, which pattern is imaged on the sensor surface of a camera, arranged in a certain disposition in space at a parallax angle to the projector, with a beam path converging in the direction of a camera central point, and is split up into image points, the light intensities of which are measured and stored, and from the light intensities of the image points the phase position of the latter is determined and stored.