Abstract: A workpiece holder, measuring device, and a method for executing a measurement by using the workpiece holder. The workpiece holder is configured to hold a workpiece with two opposite arranged workpiece surfaces to be measured in a way that both are accessible by a moveable probe unit and can thus be measured in one setting of the workpiece. For this the workpiece holder comprises a support and a holding body. The holding body has a holding end away from the support with at least one holding surface at which the workpiece is held. In the holding body a free space is formed that adjoins the workpiece surface facing the support when a workpiece is held and makes the workpiece surface accessible for measuring or probing. The accessibility for the probe unit is provided by a transverse channel extending obliquely or orthogonally to the longitudinal axis of the workpiece holder.

Abstract: A measurement arm receptacle device of a measurement system for releasably arranging a measurement arm. The measurement arm receptacle device comprises a holding device that cooperates with a counter holding device of the measurement arm. The holding and counter holding devices may each comprise at least one retaining magnet. The measurement arm receptacle device comprises an electric contact part movable between a rest position and a working position. In the rest position the contact part is electrically connected with an electric reference potential and in the working position the electric contact part is electrically connected with a measurement arm contact of the measurement arm. Thus it can be unambiguously determined via the contact part, if a measurement arm is arranged at the measurement arm receptacle device and additionally a data carrier of the measurement arm electrically connected with the measurement arm contact can be read out.

Abstract: An objective lens mount and a connection device are releasably connected. The connection device is part of an objective lens or an adapter. The objective lens mount has at least one abutment surface that cooperates with at least one counter abutment surface at the connection device. At least two V-shaped first positioning bodies with at least one positioning surface are arranged such that the positioning surfaces face the longitudinal axis. At least one counter positioning surface at the connection device abuts the positioning surfaces of the objective lens mount. The relative position in the circumferential direction is defined via a rotation stop of the objective lens mount that cooperates with a counter rotation stop of the connection device. A locking device retains the connection device at the objective lens mount and effects a force component in the axial direction and preferably a force component in circumferential direction.

Abstract: A measuring system (15) includes a measuring arm receiving unit (18) mounted on the housing (49) or on an axial pin (30) connected to the housing (49) for conjoint rotation so as to be rotatable or pivotable about the axis of rotation (D). A measuring arm (16) can be arranged on the measuring arm receiving unit (18). A motor unit (24) generates a motor torque about the axis of rotation (D) on the measuring arm receiving unit (18). A rotary angle specifying the rotary angle position of the measuring arm receiving unit (18) about the axis of rotation (D) is detected by a measuring device (67) having a scale part (68) and a detection unit (69). The scale part (68) is arranged in the form of a circular arc, annularly, or in the form of a disc about or coaxially with the axis of rotation (D).

Abstract: A measuring system (15) includes a measuring arm receiving unit (18) mounted on the housing (49) or on an axial pin (30) connected to the housing (49) for conjoint rotation so as to be rotatable or pivotable about the axis of rotation (D). A measuring arm (16) can be arranged on the measuring arm receiving unit (18). A motor unit (24) generates a motor torque about the axis of rotation (D) on the measuring arm receiving unit (18). The measuring arm unit (18) is mounted by a ball bearing guide unit (39) to be rotatable about the axis of rotation (D) in the peripheral direction and displaceably along the axis of rotation (D) in the axial direction A. An axial position of the measuring arm unit (18) in the axial direction is defined with the aid of a magnetic axial bearing device (46) and is maintained during operation.

Abstract: A method for adjusting a measuring device having an interferometer unit with an optical axis, an optical distance measuring device with a measuring axis and a support slide that is moveable along a slide axis. The measuring axis is first aligned parallel to the slide axis. An adjustment body with a first spherical reflection and/or diffraction surface and a retro reflector at the back side is arranged at the support slide. It is brought into a first confocal position, in which a first center point of the first spherical reflection/diffraction surface coincides with the focus of the spherical wavefront that is emitted from the interferometer unit. The retro reflector defines a vertex that is located close to the first center point, such that the measuring axis of the distance measuring device extends close to the focus of the emitted spherical wavefront. In doing so, Abbe-faults can be reduced or eliminated.

Abstract: A measuring device (10) has two measuring units (12), (13), each having a probe unit (16), (35). Each probe unit has a probe element (18), (37) having, in a probing direction (x), an outer probe side (18a) or (37a) and an inner probe side (18i) or (37i). To determine a zero position or a reference plane (B) at right angles to the probing direction (x), the two probe elements can be brought into contact via their respective outer probe sides (18a), (37a) or their respective inner probe sides (18i, (37i). As soon as contact between the associated probe sides (18a), (37a) or (18i), (37i) is detected, a reference plane (B) is defined as zero position in the probing direction (x) using the point of contact between the two probe elements. The zero position can thus be determined without calibrated standards or block gauges.

Abstract: The invention relates to a method for calibrating a measuring device, comprising the following steps: moving, with finite accuracy and thus with positioning error, to various points that lie in a testing volume of the measuring device and that can be characterized by spatial and/or angular coordinates, generating measurement signals at the respective points, and determining parameters of a computing model of the measuring device from the measurement signals and the spatial and/or angular coordinates. The method is characterized in that a coordinate system to which the coordinates of the points of the testing volume relate is defined from points moved to with error, by associating predetermined coordinate values with exactly six coordinates of three points.

Abstract: A workpiece contour (13) at least first and second contour geometries (K1-K2) adjoining one another tangentially at a first transition point (U1). Measurement points (M) are recorded along the geometries (K1-K2). Using some measurement points within the first geometry (K1), a first replacement element (G1) is determined and assigned to the first geometry (K1). Analogously, using some measurement points (M) of the second geometry (K2) a second geometry element (G2) assigned to the latter is determined. The size and/or the position of the second geometry element (G2) are calculated under the boundary condition that the second replacement element (G2) adjoins the first replacement element (G1) tangentially. The tangential transition point between the two replacement elements (G1), (G2) forms the first transition point (U1). This method can be iterated using additional or other measurement points (M), until the first transition point (U1) is determined with sufficient accuracy.

Abstract: A metrological apparatus (15) is disposed for adjustment of an attitude of a workpiece (16) having an arcuate upper surface (17) relative to a rotary axis (C) of the metrological apparatus (15). The workpiece (16) is brought into a first rotary position (c1). A plurality of measured points within a measuring plane on the upper surface (17) is recorded. The workpiece (16) is moved into a further rotary position (c2) about the rotary axis (C), and again measured points in the measuring plane (E) on the upper surface (17) of the workpiece (16) are recorded. Based on these recorded measured points, the actual attitude (Li) of the workpiece (16) deviation from a specified target attitude (Ls) are determined. Adjustment parameters are determined, and an adjustment assembly (24) of the metrological apparatus (15) is activated as a function of the calculated adjustment parameters to adjust the workpiece (16).

Abstract: An inductive rotary transmitter includes a rotor and a stator, which form a rotary transmitter. A rotor winding is arranged on the rotor, and a stator winding is arranged on the stator. Apart from the rotor winding, the rotor does not have any ferromagnetic or soft-magnetic material parts for inductive coupling to the stator or the stator winding. The annularly closed magnetic field lines for inductive coupling are formed on the stator side via the stator winding and a plurality of separate stator elements, which are produced from ferromagnetic or soft-magnetic material. The stator elements overlap both the rotor winding and the stator winding at a respective mounting point of the stator element and direct the magnetic field lines (M) around the rotor winding and around the stator winding to effect a magnetic coupling.

Abstract: The invention relates to a holding apparatus for an optical measurement device. The holding apparatus has two holding units for two preferably telecentric optics units of the measurement device. Each holding unit has a first bearing device and a second bearing device. The two bearing devices are arranged at a distance from one another in the direction of an optical axis of the optics unit. A three-point bearing by three bearing elements for the associated optics unit is provided on each bearing device. At least two of the bearing elements can be positioned along a relevant adjustment axis. The adjustment axes extend substantially at right angles to the relevant optical axis. The optics unit can thus be displaced in a plane spanned by the adjustment axes and can be inclined or tilted on account of the two bearing devices distanced from one another.

Abstract: The invention relates to a measuring device (10) and a method for determining a length measurand of a workpiece. A carrier part (13), on which a probe unit (18) is arranged immovably in a first spatial direction (x), can be moved or positioned by means of a positioning arrangement (12). At least one laser interferometer (24) is connected to the carrier part (13) immovably in the first spatial direction (x). By means of a first laser measuring beam (L1) and a second laser measuring beam (L2), the laser interferometer (24) generates a first measurement signal (S1), which measurement signal describes the distance of the laser interferometer (24) from a first reflector (25) in the first spatial direction (x), and a second measurement signal (S2), which describes the distance of the laser interferometer (24) from a second reflector (26) in the first spatial direction (x).

Abstract: The invention relates to a measuring device (10) and a method for operation thereof. The measuring device (10) has two measuring units (12), (13), each having a probe unit (16), (35). Each probe unit has a probe element (18), (37). Each probe element (18), (37) has, in a probing direction (x), an outer probe side (18a) or (37a) and an inner probe side (18i) or (37i) opposite the outer probe side. In order to determine a zero position or a reference plane (B) at right angles to the probing direction (x), the two probe elements can be brought into contact via their respective outer probe sides (18a), (37a) or their respective inner probe sides (18i, (37i). As soon as one of the two probe units (16) or (35) detects the contact between the associated probe sides (18a), (37a) or (18i), (37i), a reference plane (B) is defined as zero position in the probing direction (x) by means of the point of contact between the two probe elements.

Abstract: The invention is a contour standard, which consists of a body having a rotationally symmetrical calibration region. The rotationally symmetrical calibration region encompasses a plurality of non-cylindrical axial sections, which can be concave, convex, by forming a predefined angle as radial projection or as radial depression. The calibration region has at least one measuring section, which runs parallel to the longitudinal axis of the body and which provides for axial calibration variables, as well as radial calibration variables. These calibration variables are compared with the sensed values to the calibration of a measuring instrument and the measuring instrument is adjusted based on the basis of the determined deviation. Due to the rotationally symmetrical calibration region, the contour standard is suitable both for the calibration of touch contour measuring instruments and also for the calibration of contour measuring instruments, which measure optically.

Abstract: A method for ascertaining the position of an edge in or on an object surface region of interest by optical scanning. The reflectivity of the object surface region is evaluated. Light is emitted onto the object surface region under different illumination conditions, in particular different light incidence directions, and in each illumination condition a sequence S1 to Sn of camera images B is recorded. Each camera image B of a sequence S1 to Sn is recorded at another illumination intensity I. Subsequently in each case one reflectivity image R1 to Rn is produced from a plurality of or from all camera images B of a sequence S1 to Sn. Thereafter, a resulting reflectivity image E is produced from a plurality of or from all reflectivity images R1 to Rn by weighted addition, in which resulting reflectivity image E the position of an edge is determined.

Abstract: A measuring arrangement in the form of a measuring counter, a measuring slide or a measuring screw. The measuring arrangement comprises a housing in which a measuring unit, a transmission circuit and a receiving circuit are arranged on a common conductor plate. The transmission circuit and the receiving circuit use a common conductor plate antenna which is also provided on the conductor plate. A voltage supply circuit for supplying a voltage to the measuring unit, the transmission circuit and the receiving circuit is also arranged on the conductor plate. Via a measurement value sensor at the housing a measurement value is detected and converted by the measuring unit into an electrical measurement signal and transmitted via the transmission circuit wirelessly to an external central unit.

Abstract: A workpiece contour (13) at least first and second contour geometries (K1-K2) adjoining one another tangentially at a first transition point (U1). Measurement points (M) are recorded along the geometries (K1-K2). Using some measurement points within the first geometry (K1), a first replacement element (01) is determined and assigned to the first geometry (K1). Analogously, using some measurement points (M) of the second geometry (K2) a second geometry element (G2) assigned to the latter is determined. The size and/or the position of the second geometry element (G2) are calculated under the boundary condition that the second replacement element (G2) adjoins the first replacement element (G1) tangentially. The tangential transition point between the two replacement elements (G1), (G2) forms the first transition point (U1). This method can be iterated using additional or other measurement points (M), until the first transition point (U1) is determined with sufficient accuracy.

Abstract: A first thread feature is measured by detecting with an optical sensor 2 light that reaches from a light source 21 located on the opposite side of a pipe axis and runs substantially in parallel to thread grooves A4. A contact probe 31 of a contact sensor 3 is contacted with a thread flank surface A8 to detect the space coordinates of the contact probe 31 at the time of contact, so that a second thread feature is measured. The first and second thread features thus detected are combined with each other by a processor 4, and thread features of the thread provided as a measurement object are thereby calculated.

Abstract: A measuring device (10) and method for measuring a surface profile of a workpiece. A measuring carriage (15) is moved in a straight line at a distance from the workpiece surface in a moving direction (x), without accelerating a carried probe tip (25). The free probe end (40) of the probe tip (25) rests on the workpiece surface (11) with a measuring force (Fm) and is deflected during the measurement in a measuring direction (z), transverse to moving direction (x), the surface profile causes a track-dependent deflection (zT) of the probe end (49). A measured value receiver (45) detects the deflecting value (s) describing the deflection of the probe end (40) in measuring direction (z). In an analyzing unit (21), a measuring force change value describing the change of the measuring force (Fm) between the probe end (40) and the workpiece surface (11) is formed for detecting measuring errors/inaccuracies.