WO2015169329A1 - Coordinate measuring device for determining geometric properties of a measurement object - Google Patents
Coordinate measuring device for determining geometric properties of a measurement object Download PDFInfo
- Publication number
- WO2015169329A1 WO2015169329A1 PCT/EP2014/059068 EP2014059068W WO2015169329A1 WO 2015169329 A1 WO2015169329 A1 WO 2015169329A1 EP 2014059068 W EP2014059068 W EP 2014059068W WO 2015169329 A1 WO2015169329 A1 WO 2015169329A1
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- WIPO (PCT)
- Prior art keywords
- marking
- coordinate measuring
- measuring machine
- viewing direction
- imaging sensor
- Prior art date
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- 238000005259 measurement Methods 0.000 title claims abstract description 45
- 238000003384 imaging method Methods 0.000 claims abstract description 47
- 238000011156 evaluation Methods 0.000 claims abstract description 29
- 230000003287 optical effect Effects 0.000 claims abstract description 28
- 230000000737 periodic effect Effects 0.000 claims description 10
- 239000003550 marker Substances 0.000 description 21
- 238000013461 design Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 4
- 238000001454 recorded image Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 238000012634 optical imaging Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 241000238631 Hexapoda Species 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000003708 edge detection Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000010191 image analysis Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000000275 quality assurance Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/02—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness
- G01B21/04—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness by measuring coordinates of points
- G01B21/047—Accessories, e.g. for positioning, for tool-setting, for measuring probes
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/18—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors
Definitions
- the present invention relates to a coordinate measuring machine for determining geometric properties of a measurement object, with a workpiece holder for positioning the measurement object, with an imaging sensor having a defined first viewing direction, wherein the imaging sensor is adapted to an image with defined measurement points to be detected on the measurement object, with a holding structure, which positions the imaging sensor in a defined position relative to the workpiece holder, with an evaluation and control unit, which is adapted to determine a geometric property of the measurement object based on the image with the defined measurement points , and with an optical deflection element, which is movably mounted, in order to deflect the first viewing direction to a variable second viewing direction.
- a coordinate measuring machine is known for example from DE 38 34 1 17 A1.
- a coordinate measuring machine according to the present invention is an automated or semi-automated operated measuring device, with the help of two- or three-dimensional coordinates of selected measuring points are determined on a measured object. The coordinates of several measuring points can then be used to determine geometric properties of the measuring object. For example, based on the measuring point coordinates spatial dimensions of holes, protrusions and other workpiece geometries can be determined. A complete SD coordinate measurement also allows a complete 3D reconstruction of a DUT.
- coordinate measuring machines are used in quality assurance in the industrial production of products.
- Coordinate measuring machines have a sensor which can be moved within a measuring volume defined by the holding structure relative to the workpiece holder.
- the sensor is designed to detect defined measuring points on the measuring object on the workpiece holder.
- the coordinates of the detected measuring points in the coordinate system of the coordinate measuring machine are determined based on the position of the sensor relative to the workpiece holder and on the basis of the position of the sensor relative to the detected measuring points.
- Many coordinate measuring machines have tactile sensors, in particular in the form of a movably mounted probe element, with which the selected measuring points on the test object are physically touched.
- non-contact sensors in particular optical sensors that record an image of the measurement object with the defined measurement points and provide for evaluation by the evaluation and control unit of the coordinate measuring machine.
- the position of the sensor relative to the measuring points can be effected, for example, by laser triangulation in combination with the image recording, by a focus measuring method or, in certain cases, solely by means of image evaluation methods, such as edge detection.
- the coordinate measuring machine is calibrated beforehand and the sensor position then results directly from the movement position of the holding structure and / or the workpiece holder. Coordinates in the recorded image, however, are determined using the image analysis. In principle, however, it is also possible for the position of the sensor to be determined from the image data, for example if the workpiece to be measured delivers a scale between two widely separated features which is greater than the size of the field of view of the sensor.
- Optical imaging sensors typically have a defined viewing direction, which is determined by the optical elements of the sensor.
- the entire sensor In order to vary the viewing direction of the sensor, it is known to arrange the entire sensor on a rotary and / or pivot joint, which in turn is attached to the support structure of the coordinate measuring machine. Thus, the entire imaging sensor can be rotated and / or pivoted.
- a coordinate measuring machine is known for example from DE 40 26 942 A1.
- the aforementioned DE 38 34 1 17 A1 discloses a coordinate measuring machine with an imaging sensor which is arranged above the workpiece holder and has a viewing direction vertically downwards.
- the coordinate measuring machine has several front optics with which the viewing direction can be deflected.
- a deflection mirror in the beam path serves to deflect the viewing direction by 90 °.
- the lower part of the front optics with the deflection mirror can still be rotated about a vertical axis, so that the deflected second viewing direction can even be changed.
- Another coordinate measuring machine with an imaging optical sensor whose viewing direction can be varied by means of a deflecting element is known from DE 10 2004 014 153 A1.
- This coordinate measuring machine has an exchangeable optical system with a number of interchangeable lenses with different laser beam exit angles and image acquisition entrance angles.
- the deflector can in some Embodiments be pivotally mounted at the distal end of a pipe section, so that the second, deflected viewing direction can be further varied.
- the position of the rotatable or pivotable part relative to a defined reference point of the coordinate measuring must be determined as accurately as possible, so that the evaluation and control unit Coordinates of the selected measuring points within the coordinate system of the machine can be determined correctly.
- rotary or angle encoders are arranged in or on the pivotable part for this purpose.
- the rotary or angle encoders have a separate detector element, with the help of the rotational or angular position of an encoder disc can be determined.
- Such encoders have proven themselves many times in rotary joints and pivot joints on coordinate measuring machines and also in other machines in which a rotational angle position has to be determined.
- the known encoder systems require installation space in the region of the rotatable or pivotable part and they must be supplied with energy in order to be able to supply the position signals.
- the energy input is unfavorable because the associated heating can affect the accuracy of the measurement results.
- the encoder systems are one of many elements in the signal processing chain of the coordinate measuring machine, the accuracy of each element has an influence on the measurement accuracy of the coordinate measuring machine in total.
- this object is achieved by a coordinate measuring machine of the type mentioned, in which an optically detectable mark along the first viewing direction and is operatively coupled to the deflecting element, wherein the evaluation and control unit is further adapted to determine a current position of the deflecting element based on the marking.
- this object is achieved by an imaging sensor for a coordinate measuring machine for determining geometric properties of a measured object, with a defined first viewing direction, and with an optical deflecting element which is movably mounted to the first viewing direction to a variable deflecting second viewing direction, further comprising an optically detectable marking, which is arranged along the first viewing direction and is operatively coupled to the deflecting element, so that the imaging sensor is capable of taking an image with the marking, wherein the image with the mark is representative of a current position of the deflecting element
- the new coordinate measuring machine and the corresponding imaging sensor thus have an optically detectable mark, which is arranged in the field of view of the imaging sensor whose viewing direction is deflected. Therefore, the imaging sensor can not only take a picture of the measurement object but also an image of the mark. Since the marking is operatively coupled to the movably mounted deflecting element, the image of the marking changes depending on the current position of the deflecting element.
- the evaluation and control unit of the new coordinate measuring machine is able to determine the current position of the deflection element on the basis of the picture taken with the imaging sensor image of the marker. Accordingly, a special rotary or angle encoder for the deflection can be omitted.
- the movably mounted deflecting element is, in preferred embodiments of the invention, a mirror, a half mirror, a prism or other optical element capable of redirecting an observation beam path of the imaging sensor.
- the new optically detectable marking is arranged on this element or in the region of this element such that the shape and / or position of this marking in the recorded image depends on the current position of the deflection element.
- the image of the mark taken with the imaging sensor changes depending on the current position of the movable deflection element. Therefore, the mark in the image is representative of the current operating position of the deflecting element and accordingly, the evaluation and control unit is capable of the current position of the deflecting element based on the Determine the image of the mark taken with the imaging sensor itself.
- the imaging sensor of the new coordinate measuring machine therefore has a dual function. On the one hand, it serves - in a manner known per se - to take a picture of the measurement object.
- the evaluation and control unit is - also in a conventional manner - in a position to determine characteristic properties of the measurement object based on this image.
- the same imaging sensor now also serves to determine a current position of the deflection element, with which the viewing direction of the imaging sensor for receiving the measurement object can be varied.
- the new coordinate measuring machine and a corresponding imaging sensor have the advantage that the current position of the deflecting element is virtually direct, i. without interposed further sensor elements to be determined. This allows high accuracy because the number of elements in the signal processing chain is reduced. The above object is therefore completely solved.
- the marker is arranged on the deflecting element.
- the marking is arranged in the region of the optically active surface of the deflection element and applied in particular on the optically active surface.
- This refinement enables a very space-saving realization and a particularly high measuring accuracy, since the marking directly represents the position of the optical deflecting element. This is particularly true when the mark is applied to the optically active surface, since the position and / or shape of the Mark in the captured image is representative of the deflected second viewing direction directly.
- the deflecting element has an opening, behind which the marking is arranged in the first viewing direction.
- the imaging sensor can see the mark through the opening in the deflection element, the mark can not influence the properties of the optically effective surface of the deflection element.
- the embodiment therefore has the advantage that the image acquisition is decoupled with respect to the measurement object from the position determination of the deflection element.
- the marking can not influence the measuring picture recording.
- the imaging sensor has an optical system with a defined focus area in the object space, wherein the mark is arranged outside the defined focus area, and wherein the evaluation and control unit includes a detection routine to the mark in one with the imaging sensor to identify the captured image.
- the mark in the image recording is outside the range in which the sensor can provide a sharp image.
- the marking is therefore displayed blurred.
- the evaluation and control unit has a special detection routine that can identify and evaluate the features of the marking that are representative of the current position of the deflection element despite the fuzzy image.
- the evaluation and control unit has a database in which a plurality of reference images of the fuzzy imaged mark are stored, so that the evaluation and control unit can identify the characteristic features of the marker using a pattern comparison and evaluate the database.
- the detection routine includes algorithms that, in particular, can detect and evaluate periodic structures in the blurred image. The design has the advantage that the focus area that can be realized with the optics is completely available for the acquisition of the object to be measured. Therefore, this embodiment allows a large work area of the new coordinate measuring machine.
- the imaging sensor has an optical system with a first and a second defined focus area, wherein the first focus area focuses on the marking and the second focus area focuses on the measurement object.
- the coordinate measuring machine is able to selectively focus on the measurement object or on the marker.
- the design facilitates a highly accurate determination of the current position of the deflecting element.
- the optics is a zoom lens with a plurality of different magnifications and with a plurality of different focus areas, wherein a defined magnification and a defined focus area are independently selectable.
- the new coordinate measuring machine offers great flexibility with regard to the performance of different measuring tasks.
- An advantageous zoom optics according to this embodiment is, for example, in US
- this embodiment has the advantage that the use of the variable deflection element considerably increases the field of application of such a zoom lens, because the zoom lens can only be pivoted very heavily due to its weight and its external dimensions.
- the marking allows a very space-saving and highly accurate variation and determination of the viewing direction of such a zoom optics. The advantages of the present invention therefore occur particularly clearly in this embodiment.
- the large working range of such a zoom optics also favors the optional introduction of a deflecting element.
- the marker has a defined two-dimensional shape, in particular a circle and / or a polygon.
- the two-dimensional shape is symmetrical to a rotational or pivot axis of the deflecting element or symmetrical to an axis extending parallel thereto, and / or if the marking has a plurality of marking features, which are arranged at a distance from each other, at least 50% and advantageously at least 70% of the corresponding dimension of the deflecting element (measured parallel to the distance of the marking elements) is.
- the embodiments have the advantage that a distortion / deformation of the marker due to a change in position of the deflector can be detected and evaluated fairly easily and with high reliability and accuracy. This is especially true for a symmetrical shape.
- a circle is advantageous in the case of a pivotable deflection element, since it represents an ellipse at an oblique viewing angle, which provides two orthogonal principal axes for evaluation.
- the accuracy of position determination increases with increasing base length for the measurement, determination of distances between two distant marker features is very advantageous.
- the marker has a periodic structure with at least two periods.
- This embodiment is particularly advantageous when the mark is outside the focus range of the optics, since periodic structures can be identified in blurred images with high accuracy by determining the "fundamental" of the periodic structure, which also in a blurred image.
- a periodic structure contains redundant information that can be advantageously evaluated to increase the accuracy of the measurement.
- the marking has refractive, diffractive and / or holographic-optical structures.
- the markers can be arranged very advantageous in the field of view of the optical sensor.
- the elements make it possible to determine a current position of the deflecting element with a high degree of accuracy, since in these cases even slight changes in position of the deflecting element can cause great changes in the marking in the recorded image.
- the coordinate measuring machine and the imaging sensor have a plurality of different deflection elements which are interchangeable, each deflection of the plurality of deflection elements having an individual marking which identifies the respective deflection element.
- the various deflecting elements each have an optically detectable mark, which is not only designed to determine the current position of the deflecting element as such. Rather, the individual marking allows a unique identification of the respective deflecting element and thus a distinction from the other deflecting elements of the sentence.
- the various deflecting elements taken separately, are rigidly mounted, so that a variation of the viewing direction is achieved solely by the replacement of an individual deflecting element against another. The above-mentioned movable storage is therefore equated with the interchangeability of the deflecting elements.
- the replaceable deflecting elements can themselves be movably mounted, whereby an even greater variety of variations is provided.
- An individual marking for each replaceable deflecting element which is recorded with the aid of the imaging sensor itself and evaluated in the evaluation and control unit, advantageously contributes to reducing measurement errors and ensuring a consistently high measuring accuracy.
- the coordinate measuring machine and the imaging sensor have a light source which selectively illuminates the marking in order to make the marking on the imaging sensor detectable.
- This embodiment has the advantage that the marking can be "hidden” in a simple manner, as soon as the position of the deflecting element is determined. The recording of an image of the measurement object can then take place practically uninfluenced by the marking.
- This embodiment helps to decouple the image recording for the measurement of a measurement object and the image recording for the determination of the current position of the deflection element from each other in order to reduce any influences of the marking on the measurement accuracy when measuring a workpiece.
- FIG. 1 shows an embodiment of the new coordinate measuring machine with an imaging sensor according to the present invention
- FIG. 2 shows a schematic representation of the imaging sensor in the coordinate measuring machine according to FIG. 1, FIG.
- FIG. 3 shows a schematic representation of the optical deflection element with markings for the image sensor according to FIG. 2, FIG.
- Fig. 5 is a schematic representation for explaining a further embodiment.
- a coordinate measuring machine according to an embodiment of the invention is designated in its entirety by the reference numeral 10.
- the coordinate measuring machine 10 has a workpiece holder 12, which is realized here in the form of a cross table (X-Y table).
- the workpiece holder 12 serves to position a measuring object 14 (see FIG. 2), from which geometric properties are determined with the aid of the coordinate measuring machine 10.
- the workpiece holder 12 has in this case an upper part 16 which is movably mounted on two guide rails 18 in a first direction. Typically, this first direction is called the X-axis.
- the guide rails 18 are arranged on a lower part 20 which is movably mounted on further guide rails (not visible in FIG. 1) in a second spatial direction. Typically, this second spatial direction is referred to as Y-axis.
- a workpiece positioned on the workpiece holder 12 can accordingly be moved in two mutually orthogonal spatial directions X and Y.
- the reference numeral 22 denotes a column on which a carriage 24 is movably mounted in a third spatial direction.
- the third spatial direction is usually referred to as the Z direction.
- the carriage 24 carries here an optical sensor 26 and also a tactile sensor 28.
- the coordinate measuring machine 10 is a so-called multi-sensor coordinate measuring machine, which makes it possible to detect selected measuring points on a measuring object in different ways.
- the present invention is not limited to such coordinate measuring machines and can equally be applied to coordinate measuring machines having only an optical imaging sensor.
- the invention is not limited to coordinate measuring machines with the support structure for the optical sensor 26 shown here.
- the reference numeral 30 denotes an evaluation and control unit, which is arranged here on the fixed column 22.
- the evaluation and control unit 30 serves to bring the respectively used sensor 26, 28 into a desired measuring position relative to a measuring object on the workpiece holder 12.
- the evaluation and control unit 30 is able to determine coordinates of selected measuring points on the measuring object 14 and, subsequently, geometric properties of the measuring object.
- the evaluation and control unit can be divided into two separate components, wherein in particular the evaluation unit is then realized as a separate computer.
- the second lens group 42, third lens group 44, fourth lens group 46, and aperture 48 are each slidable parallel to the optical axis / line of sight 40, as indicated by four vertical double-headed arrows.
- the second lens group 42, third lens group 44, fourth lens group 46 and diaphragm 48 are each arranged on a carriage (not shown here in detail).
- the carriages are mounted on one or more guide rails 50 and can be moved via one or more drives 52, so that the respective position of the lens groups 42, 44, 46 and the diaphragm 48 along the optical axis 40 can be varied.
- an advantageous zoom lens in which a plurality of different magnifications and a multiplicity of different focus areas in the object space can be set largely independently of one another.
- this zoom lens again referred to the above-mentioned US 2014/0043470 A1, which is incorporated herein by reference again.
- the third lens group 44 and the diaphragm 48 may in some embodiments be coupled together, which is at the expense of individual adjustability, but allows a simpler and less expensive construction.
- Reference numeral 54 denotes a camera chip having a multiplicity of picture elements, which are arranged in particular like a matrix.
- the camera chip 54 makes it possible to record an object image which is imaged onto the camera chip 54 by the optics formed by the lens groups 38, 42, 44, 46 and the diaphragm 48.
- the first viewing direction 40 of the sensor 26 in the coordinate measuring machine 10 is vertically from top to bottom.
- the image sensor 26 thus sees vertically from top to bottom on the workpiece holder 12. If a workpiece 14 is to be measured, in which selected measuring points 56 are accessible only from the side, the workpiece 14 would have to be positioned on the workpiece holder 12 such that the Point measuring points 56 upwards. This is not possible in all cases without repositioning the measurement object to record all desired measurement points. For this reason, the coordinate measuring machine 10 has an optical deflection element 60, which deflects the first viewing direction 40 to a second viewing direction 62.
- the deflection element 60 is shown here in simplified form as a mirror surface, which is arranged at an angle to the first viewing direction / optical axis 40.
- the deflecting element 60 is pivotable about a pivot axis 64, which is indicated by the double arrow 66. By pivoting the deflecting element 60 about the axis 64, the second viewing direction 62 can be varied, which is indicated by the further double arrow 68.
- the deflecting element 60 may be a prism or a multi-part optical system consisting of prismatic and / or mirror surfaces in further embodiments. Furthermore, it is conceivable in further exemplary embodiments that the deflection element 60 as such is arranged rigidly in the housing 70 of a lens attachment 72. In these embodiments, the new coordinate measuring machine and the corresponding imaging sensor include a plurality of lens attachments 72, 72 ', in each of which different deflecting elements 60 are arranged, which allow different second viewing directions 62. A variation of the second viewing direction can therefore be achieved in these exemplary embodiments in that an optical deflecting element 60 can be attached to the objective body 36 in an exchangeably movable manner.
- the deflection element 60 can be rotatable about an axis which is arranged parallel to the first viewing direction / optical axis 40, which is indicated here by means of the double arrow 74.
- the first viewing direction 40 of the imaging sensor 26 can be deflected to a variable second viewing direction 62 so that the sensor 26 can detect measuring points 56 on a measuring object 14 which are difficult or impossible to access along the first viewing direction 40 ,
- the evaluation and control unit 30 can correctly determine the recorded measuring points 56 in the coordinate system of the coordinate measuring machine 10.
- this is realized with the aid of a marking 80 which, in some embodiments, can be applied directly on the surface of the deflecting element 60 facing the camera chip 54.
- the marker 80 may have a two-dimensional shape including, in particular, a circle 80a, 80d.
- the marking 80 can have further two-dimensional shapes, as shown in FIG. 3 by way of example with reference to the squares 80b, 80e and with reference to the triangles 80c, 80f.
- the marker 80 includes a plurality of different shape elements, as illustrated by the circles 80a, 80d, squares 80b, 80e, and triangles 80c, 80f. At least some of these shaped elements are advantageously symmetrical about an axis 82 which lies parallel to the pivot axis 84 or another movement axis of the deflection element 60.
- the marker 80 includes a grid of mutually orthogonal lines.
- the grating forms a periodic structure with a plurality of periods 88, which is particularly advantageous when the marking 80 on the deflection element 60 is outside the focus area 84 of the sensor 26 (see FIG. 1) and accordingly by the optics of the sensor imaging sensor can only be shown blurred.
- the optics of the sensor 26 has a plurality of different focus areas 84, 86, so that it is possible to selectively focus on the marker 80 by means of the optics , In these cases, a sharp image of the mark 80 can be recorded and evaluated with the aid of the camera chip 54.
- the evaluation and control unit 30 preferably includes a special detection routine (indicated in Fig. 1 by the processor 32) adapted thereto to identify the individual characteristics of the fuzzy imaged marker 80. This can be realized particularly advantageously in combination with a marking 80 having a periodic structure with at least two periods, the optically detectable period in the recorded image of the marking 80 varying as a function of the current position of the deflection element 60.
- the marker 80 is realized with the aid of refractive, diffractive and / or holographic-optical structures. Such structures change the light incident in the optics of the sensor 26 as a function of the current position of the deflection element 60.
- the coordinate measuring device 10 and the corresponding sensor 26 have a special light source 90 for illuminating the marker 80.
- FIG Marker 80 can only be detected using the sensor 26 when the light source 90 is activated so that the marker 80 can optionally be made detectable. This is especially true for those cases in which the mark 80 is realized by means of diffractive structures.
- Fig. 5 shows a schematic representation of another embodiment of a lens attachment 72 with a movably mounted deflecting element 60 according to another embodiment.
- the deflecting element 60 has one or more openings 92.
- the marking 80 is here - as seen in the first viewing direction - arranged behind the opening 92.
- the clear inner diameter of the opening 92 is smaller than the mark 80, so that only a portion of the mark 80 can be received through the opening 92 by means of the sensor 26 in each case.
- the respective recordable section depends on the current position of the deflecting element 60, which can be realized, for example, by the marking 80 having a structure that changes along its lateral extent.
- the marker 80 may include a periodic structure whose period increases or decreases in one or more lateral directions, similar to a frequency modulated signal. Based on the respective section of the marking 80 visible through the opening 92, the current deflection position of the deflection element 60 can then be determined with the aid of the sensor 26.
- the marking visible in each case through the opening 92 can show a section of a continuous periodic structure, the information about the current deflection position of the deflection element being coded in the phase position visible through the opening 92.
- the respectively visible section of the marking may include a digital coding, for example in the form of a binary coded number, which is representative of the current deflection position.
- the sharpness level for the structure 80 is known and largely retained during pivoting of the deflecting element 60.
- marks would remain on the deflector on the axis of rotation in the focal plane, while others outside the axis of rotation then move with increasing rotation from the plane of sharpness of the axis of rotation.
Abstract
Description
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PCT/EP2014/059068 WO2015169329A1 (en) | 2014-05-05 | 2014-05-05 | Coordinate measuring device for determining geometric properties of a measurement object |
DE112014006641.9T DE112014006641A5 (en) | 2014-05-05 | 2014-05-05 | Coordinate measuring device for determining geometric properties of a measurement object |
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PCT/EP2014/059068 WO2015169329A1 (en) | 2014-05-05 | 2014-05-05 | Coordinate measuring device for determining geometric properties of a measurement object |
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Cited By (1)
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CN111527458A (en) * | 2017-11-02 | 2020-08-11 | 费斯托工具有限责任公司 | System for processing workpieces |
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2014
- 2014-05-05 DE DE112014006641.9T patent/DE112014006641A5/en active Pending
- 2014-05-05 WO PCT/EP2014/059068 patent/WO2015169329A1/en active Application Filing
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