摘要:
The invention relates to a device and to a method for reconstruction of a surface of an object (0) by means of a structured illumination, comprising at least one projector device (1) for diffractive projection onto the surface of the object of measuring patterns (MM1, MM2, MM3) having measuring elements, in particular measuring points (P); at least one detecting device (3) for detecting the measuring patterns (MM1, MM2, MM3) on the surface of the object; a computer device (5) for reconstruction, performed in particular by means of triangulation, of the surface of the object from a respective distortion of a measuring pattern. The invention is characterised in that all possible positions of measuring elements in repeating groups (G) are represented in a measuring pattern, in which a respective combination of generated and/or non-generated measuring elements encodes the respective location in the overall pattern (GM).
摘要:
A device and a method for determining three-dimensional surface coordinates of an object by means of optical colour triangulation are proposed, wherein all lines (3) of a colour fringe pattern (1) in each case have a width (BR) set in such a way that, in a recorded image (7) of the line (3), all contrast maxima (CMax), of all spectral components of a line (3) are equal to a minimum contrast value (CMin). Proceeding from an invariable smallest width of a pattern line (3a) with a spectral component of highest contrast, further lines (3) can be correspondingly widened. The invention is particularly advantageously suitable for a 3D measurement for biological tissue.
摘要:
The invention relates to an endoscope and to a method for measuring the topography of a surface (4) by means of an endoscope (30, 33, 40, 44, 44'). Projection beams (12) are thereby emitted from a projection unit (6), wherein an image generating unit associated with the projection unit (6) generates phase-structured image sequences in close-up by means of a light-emitting display (42) or at a distance by means of a projection module (46) and downstream image guides (32, 50), and transmits said sequences to the projection unit (6). In this manner, both alternatives according to the invention allow sequences of phase-structured images, phase-shifted relative to each other, to be projected onto the surface to be measured and imaged by means of the projection unit, even under very spatially limited conditions. The slide changes previously required for such a procedure for generating phase-shifted images is thereby eliminated, and replaced by generating at a distance, subject only to easily controllable spatial restrictions, or generating in close-up by means of the light-emitting display (micro-display). The latter alternative in particular allows a battery-powered, capsule-shaped 3D measurement head to be inserted into cavities to be measured without any feeds (other than the guide wire). In this case, the battery powers both the micro display and the image sensor, wherein the image sensor data representing the reflection of the projected image can be either transmitted wirelessly to an analysis unit, such as a visualization computer, or stored intermediately in the capsule-shaped measurement head itself.
摘要:
The invention relates to an endoscope for measuring the topography of a surface (4), comprising a projection unit (6) and an imaging unit (8), said projection unit and imaging unit being arranged successively in relation to an axis (10) of the endoscope.
摘要:
The invention relates to a 3-D measuring device (M) and to a method for three-dimensionally sensing elongate cut-outs, in particular grooves, in particular rotor grooves. The invention is characterized in that (S0; S1) positioning and fastening of an assembly on an elongate cut-out of a body, in particular a rotor, wherein a 3-D measuring head is connected to the assembly and is oriented toward the elongate cut-out for 3-D surface measurement, and (S2) three-dimensional scanning of the surface of the elongate cut-out by linearly guiding the 3-D measuring head along the longitudinal axis of the elongate cut-out are performed.
摘要:
The invention relates to a method for measuring the depth of a surface of a test object. According to said method, a colored fringe pattern formed by a sequence of colored fringes (4) is projected onto a surface of the test object, and a fringe pattern (7) reflected by the surface of the test object is detected and evaluated by means of an evaluation device, the colored fringe pattern and the evaluation device being designed such that the depth of the surface of the test object is measured based on the sequence of colored fringes (4) of the reflected fringe pattern (7) and based on a sequence of fringe (5) widths of the reflected fringe pattern (7).