CN117029704A - Multi-lens wire drawing die aperture measurement system - Google Patents
Multi-lens wire drawing die aperture measurement system Download PDFInfo
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- CN117029704A CN117029704A CN202311253399.XA CN202311253399A CN117029704A CN 117029704 A CN117029704 A CN 117029704A CN 202311253399 A CN202311253399 A CN 202311253399A CN 117029704 A CN117029704 A CN 117029704A
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- wire drawing
- light source
- lenses
- drawing die
- imaging
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- 238000005491 wire drawing Methods 0.000 title claims abstract description 68
- 238000005259 measurement Methods 0.000 title claims abstract description 34
- 238000003384 imaging method Methods 0.000 claims abstract description 87
- 238000013461 design Methods 0.000 abstract description 2
- 238000004364 calculation method Methods 0.000 description 5
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/08—Measuring arrangements characterised by the use of optical techniques for measuring diameters
- G01B11/12—Measuring arrangements characterised by the use of optical techniques for measuring diameters internal diameters
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/08—Measuring arrangements characterised by the use of optical techniques for measuring diameters
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/24—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
- G01B11/2408—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures for measuring roundness
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/26—Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The invention relates to the technical field of wire drawing die aperture measurement, in particular to a multi-lens wire drawing die aperture measurement system. The multi-lens wire drawing die aperture measuring system comprises a plurality of light source lenses, a plurality of imaging lenses and a computer terminal, wherein the light source lenses are arranged on one side of an inner hole of a wire drawing die to be measured at intervals, the imaging lenses are arranged on the other side of the inner hole of the wire drawing die to be measured at intervals, emitted light rays of the light source lenses penetrate through the center of the inner hole of the wire drawing die to be measured and are received by the imaging lenses in a one-to-one correspondence mode, and the computer terminal is connected with the light source lenses and the imaging lenses respectively. The advantages are that: reasonable in design, use cost is low, and measurement repeatability is high, measurement index is stable, and measurement efficiency is higher.
Description
Technical Field
The invention relates to the technical field of wire drawing die aperture measurement, in particular to a multi-lens wire drawing die aperture measurement system.
Background
The measurement scheme of the 3D aperture measuring instrument of the wire drawing die now consists of an imaging lens b, an angle turntable c and a light source lens D (as shown in fig. 1). The light source lens, the wire drawing die and the imaging lens are positioned on the same axis, the light source lens emits light spots, the light spots pass through holes in the wire drawing die and are finally imaged by an image sensor in the imaging lens, and software obtains the aperture of the wire drawing die to be measured through calculation and analysis of imaging, but only can measure 2D diameter data of the holes; in order to measure the inner hole curve of the wire drawing die, namely, the data such as the compression angle, the bearing length, the diameter, the ellipticity and Kong Pianjiao, the wire drawing die is placed on a turntable capable of rotating at a high precision angle, the wire drawing die is rotated by the angle turntable to move + -15 degrees, 30-degree image data are collected in total, and the data such as the compression angle, the bearing length, the diameter, the ellipticity and Kong Pianjiao of the inner hole of the wire drawing die can be obtained by calculating and analyzing the 30-degree image data through software.
In order to ensure that the precision and the repeatability reach good levels when measuring the 3D data of the inner hole of the wire drawing die, a high-precision micron-level angle rotary turntable is needed, and because the wire drawing die is different in size and is not required to be maintained for long-term use of customers, a high-precision micron-level turntable with a higher requirement for heavy-duty oil seal is needed; the cost is higher, the cost of a single turntable is 1 ten thousand-2 ten thousand different, the precision of the turntable for arriving goods is different, the turntable is required to be screened for use, and the cost is high.
Disclosure of Invention
The invention aims to provide a multi-lens wire drawing die aperture measuring system, which effectively overcomes the defects of the prior art.
The technical scheme for solving the technical problems is as follows:
the utility model provides a wire drawing mould aperture measurement system of multiple lens, includes a plurality of light source lenses, a plurality of imaging lens and computer terminal, and a plurality of above-mentioned light source lenses interval arrangement is in one side of the hole of wire drawing mould that is surveyed, and a plurality of above-mentioned imaging lens interval arrangement is in the opposite side of the hole of wire drawing mould that is surveyed, and the transmission light of a plurality of above-mentioned light source lenses all passes behind the hole center of wire drawing mould that is surveyed by the receipt of a plurality of above-mentioned imaging lens one-to-one, and above-mentioned computer terminal is connected with above-mentioned light source lens and imaging lens respectively.
On the basis of the technical scheme, the invention can be improved as follows.
Further, the light source lenses are arranged on one side of the inner hole of the tested wire drawing die at equal intervals in an arc shape, the emitted light rays of all the light source lenses are distributed in a fan shape, and the corresponding imaging lenses are arranged on the other side of the inner hole of the tested wire drawing die at equal intervals in an arc shape.
Further, the emitted light rays of the plurality of first light source lenses are distributed in a fan shape, and a central angle formed between the emitted light rays of the two first light source lenses at two ends is α, where α=30°.
Further, the two sides of the inner hole of the wire drawing die to be tested are respectively provided with an imaging beam splitter prism, the plurality of light source lenses are equally divided into two groups, wherein the plurality of light source lenses of one group are distributed on one side of the inner hole of the wire drawing die to be tested at equal intervals in an arc shape, the plurality of imaging lenses of the other group are distributed on the other side of the inner hole of the wire drawing die to be tested at equal intervals in an arc shape, the emitted light of the plurality of light source lenses of one group sequentially passes through one of the imaging beam splitter prisms, the inner hole of the wire drawing die to be tested and the other imaging beam splitter prism, the plurality of light source lenses of the other group are received by the plurality of imaging lenses of the one group in a one-to-one correspondence manner, the plurality of light source lenses of the other group are distributed on one side middle area between the light source lenses of the one group and the imaging lenses of the other group at equal intervals in an arc shape, the plurality of imaging lenses of the other group are distributed on the other side middle area between the light source lenses of the one group and the imaging lenses of the other group at equal intervals, the plurality of light source lenses of the one group are sequentially received by the one group of the imaging beam splitter prism, and the plurality of light source lenses of the imaging lenses of the other group are sequentially arranged by the imaging beam splitter prism of the one group and the imaging beam splitter prism.
Further, the imaging beam splitter prism is a cube prism.
Further, the light source lens and the imaging lens are distributed in the same plane.
The beneficial effects of the invention are as follows: reasonable in design, use cost is low, and measurement repeatability is high, measurement index is stable, and measurement efficiency is higher.
Drawings
FIG. 1 is a schematic diagram of a prior art structure involved in a multi-lens wire drawing die aperture measurement system of the present invention;
FIG. 2 is a schematic diagram of an embodiment of a multi-lens wire drawing die aperture measurement system of the present invention;
fig. 3 is a schematic structural diagram of another embodiment of the multi-lens wire drawing die aperture measuring system of the present invention.
In the drawings, the list of components represented by the various numbers is as follows:
1. a light source lens; 2. an imaging lens; 3. a wire drawing die to be tested; 6. imaging beam-splitting prism.
Detailed Description
The principles and features of the present invention are described below with reference to the drawings, the examples are illustrated for the purpose of illustrating the invention and are not to be construed as limiting the scope of the invention.
Example 1
The multi-lens wire drawing die aperture measurement system of this embodiment includes a plurality of light source lenses 1, a plurality of imaging lenses 2 and computer terminals (which are the computer terminals of the existing conventional image processing and computing, and are not described here in detail), a plurality of light source lenses 1 are arranged at intervals on one side of the inner hole of the wire drawing die 3 to be tested, a plurality of imaging lenses 2 are arranged at intervals on the other side of the inner hole of the wire drawing die 3 to be tested, and the emitted light rays of a plurality of light source lenses 1 are received by a plurality of imaging lenses 2 in one-to-one correspondence after passing through the center of the inner hole of the wire drawing die 3 to be tested, and the computer terminals are respectively connected with the light source lenses 1 and the imaging lenses 2.
The multi-lens wire drawing die aperture measurement system of the embodiment has the following advantages:
1) The price cost is low and the problem of goods supply is not worried; the scheme can dispense with an angle turntable with high import price;
2) The measurement repeatability is high, and the measurement index is stable; the angle turntable of the moving part in the original scheme can cause unstable measurement repeatability due to shaft runout; the scheme comprises a plurality of light source lenses and imaging lenses, has no moving parts, and has high and stable measurement repeatability;
3) The rapid measurement can be carried out; in the scheme in the prior art, only a single light source lens and an imaging lens are needed to collect and analyze image data of each angle through rotation of an angle turntable, so that the collection time of a plurality of angles is long; according to the scheme, the plurality of groups of light source lenses and the imaging lens are used for collecting a plurality of angles at the same time, so that second measurement can be realized, and the measurement efficiency is greatly improved.
In the present embodiment, the arrangement of the plurality of light source lenses 1 and the plurality of imaging lenses 2 includes at least two forms:
1) As shown in fig. 2, the light source lenses 1 are arranged at one side of the inner hole of the measured wire drawing die 3 at equal intervals in an arc shape, and all the emitted light rays of the light source lenses 1 are distributed in a fan shape, and the corresponding imaging lenses 2 are arranged at the other side of the inner hole of the measured wire drawing die 3 at equal intervals in an arc shape.
In the scheme 1), the light source lens 1 of each angle emits light beams during measurement, a plurality of light beams pass through the inner hole of the measured wire drawing die 3 positioned at the intersection point of the light beams, and finally imaging is carried out in a plurality of imaging lenses 2, and software can quickly and accurately obtain data such as the compression angle, the bearing length, the diameter, the ellipticity, kong Pianjiao and the like of the measured wire drawing die 3 by carrying out arrangement calculation on images of the imaging lenses 2 corresponding to each angle (in the prior art, the method is the same as a subsequent calculation method in the prior art, and details are omitted).
What needs to be stated is: in the scheme 1), 16 light source lenses 1 are taken as an example (refer to fig. 2), and the central angle of the emission line of the two light source lenses 1 at both ends is α, and α=30° among the 16 light source lenses 1.
As shown in fig. 3, two sides of the inner hole of the measured wire drawing die 3 are respectively provided with an imaging beam splitter prism 6, the plurality of light source lenses 1 are equally divided into two groups, wherein the plurality of light source lenses 1 of one group are distributed at one side of the inner hole of the measured wire drawing die 3 at equal intervals in an arc shape, the plurality of imaging lenses 2 are equally divided into two groups, the plurality of imaging lenses 2 of one group are distributed at the other side of the inner hole of the measured wire drawing die 3 at equal intervals in an arc shape, the emitted light of the plurality of light source lenses 1 of one group sequentially passes through one of the imaging beam splitter prisms 6, the inner hole of the measured wire drawing die 3 and the other imaging beam splitter prism 6, the light source lenses 1 of the other group are distributed in an arc-shaped equidistant way in the middle area on one side between the light source lenses 1 of the other group and the imaging lenses 2 of the one group, the imaging lenses 2 of the other group are distributed in an arc-shaped equidistant way in the middle area on the other side between the light source lenses 1 of the one group and the imaging lenses 2 of the one group, and the emitted light of the light source lenses 1 of the other group sequentially passes through one of the imaging beam splitter prisms 6, the inner hole of the tested wire drawing die 3 and the other imaging beam splitter prism 6 and is received by the imaging lenses 2 of the other group in a one-to-one correspondence way.
Specifically: the number of the plurality of light source lenses 1 in the scheme 2) is equal to the number of the light source lenses 1 in the scheme 1), and the difference is that the plurality of light source lenses 1 are equally divided into two groups (specifically, on the basis of the scheme 1), the plurality of light source lenses 1 in the scheme 1) are divided into one group from one end to the other end, then the divided group of the plurality of light source lenses 1 are rotated around one of the imaging beam splitting prisms 6 on the corresponding side by a certain angle, which can be 90 degrees or other angles, after being divided into two groups, one group is defined as a group, the other group is defined as a group, the orientation of which is identical to the orientation of the light source lens 1 in the scheme 1), and at the same time, the plurality of imaging lenses 2 are equally divided into two groups (on the basis of the scheme 1), dividing the imaging lenses 2 in the scheme 1) into a group from one end to the tommy end, rotating the divided group of the imaging lenses 2 around another imaging beam splitter prism 6 on the corresponding side by a certain angle, wherein the angle can be 90 degrees or other angles, after being split, one group is defined as a group C, the other group is defined as a group D, the direction of the group C is consistent with the direction of the imaging lens 2 in the scheme 1), in the scheme, the emitting rays of the light source lenses 1 of the group A sequentially pass through one group of the imaging beam splitter prisms 6, the inner hole of the tested wire drawing die 3 and the other imaging beam splitter prism 6, then are received by the imaging lenses 2 of the group C in a one-to-one correspondence manner, the emitting rays of the light source lenses 1 of the group C are reflected through the inner hole of the tested wire drawing die 3 after being emitted to the imaging beam splitter prism 6 of the group C, and then reflected again by another imaging beam splitter prism 6, and received by the multiple imaging lenses 2 of the group D in one-to-one correspondence, finally, the software performs permutation calculation on the images of the first imaging lens 2 of the corresponding angle (which is the same as the subsequent calculation method in the prior art and is not described in detail here), so that the data such as the compression angle, the bearing length, the diameter, the ellipticity, kong Pianjiao of the measured wire drawing die 3 can be rapidly and accurately obtained, and the effects of rapid measurement and accurate measurement can be achieved.
What needs to be stated is: in the scheme 2), taking 16 light source lenses 1 as an example, the group a has 8 light source lenses 1, and the central angle between the light rays emitted by two light sources located at two ends of the 8 light source lenses 1 is β, β=28° (because the two groups of light source lenses 1 in the scheme 2) are the angle orientations formed after being split and rotated by a certain angle on the basis of the scheme 1), the distribution of the light source lenses 1 in the group a is equivalent to that of 7 of the light source lenses 1 located at one stage of the end part and distributed at intervals on the basis of the scheme 1), and similarly, the central angle between the light rays emitted by two light sources located at two ends of the 8 light source lenses 1 in the group B is γ, γ=28°. And, the number of imaging lenses 2 in the group C and the group D is equal, and is 8.
In the present embodiment, the imaging beam splitter prism 6 is preferably a cube prism.
In the present embodiment, the light source lens 1 and the imaging lens 2 are distributed in the same plane.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations may be made in the above embodiments by those of ordinary skill in the art within the scope of the invention.
Claims (6)
1. A multi-lens wire drawing die aperture measurement system is characterized in that: including a plurality of light source lens (1), a plurality of imaging lens (2) and computer terminal, a plurality of light source lens (1) interval arrangement is in one side of the hole of survey wire drawing mould (3), a plurality of imaging lens (2) interval arrangement is in the opposite side of the hole of survey wire drawing mould (3), and a plurality of light source lens (1) emission light all passes behind the hole center of survey wire drawing mould (3) by a plurality of imaging lens (2) one-to-one's receipt, computer terminal respectively with light source lens (1) and imaging lens (2) are connected.
2. The multi-lens wire drawing die aperture measurement system of claim 1, wherein: the light source lenses (1) are arranged on one side of an inner hole of the tested wire drawing die (3) at equal intervals in an arc shape, all emitted light rays of the light source lenses (1) are distributed in a fan shape, and the imaging lenses (2) are arranged on the other side of the inner hole of the tested wire drawing die (3) at equal intervals in an arc shape.
3. The multi-lens wire drawing die aperture measurement system of claim 2, wherein: the central angle formed between the emitted light rays of the two light source lenses (1) at the two ends is alpha, and alpha=30°.
4. The multi-lens wire drawing die aperture measurement system of claim 1, wherein: the two sides of the inner hole of the tested wire drawing die (3) are respectively provided with an imaging beam splitter prism (6), a plurality of light source lenses (1) are equally divided into two groups, wherein a plurality of light source lenses (1) of one group are distributed on one side of the inner hole of the tested wire drawing die (3) at equal intervals in an arc shape, a plurality of imaging lenses (2) are equally divided into two groups, a plurality of imaging lenses (2) of one group are distributed on the other side of the inner hole of the tested wire drawing die (3) at equal intervals in an arc shape, the emitted light of a plurality of light source lenses (1) of one group sequentially passes through one imaging beam splitter prism (6), the inner hole of the tested wire drawing die (3) and the other imaging beam splitter prism (6), and the imaging lenses (2) of one group are correspondingly received one by one, the light source lenses (1) of the other group are distributed in one side middle area between the light source lenses (1) of the other group and the imaging lenses (2) of the one group at equal intervals in an arc shape, the imaging lenses (2) of the other group are distributed in the other side middle area between the light source lenses (1) of the one group and the imaging lenses (2) of the one group at equal intervals in an arc shape, and the emitted light rays of the light source lenses (1) of the other group sequentially pass through one of the imaging beam splitting prisms (6), the inner hole of the tested wire drawing die (3) and the other imaging beam splitter prism (6) are received by the imaging lenses (2) of the other group in a one-to-one correspondence mode.
5. The multi-lens wire drawing die aperture measurement system of claim 4, wherein: the imaging beam splitter prism (6) is a cube prism.
6. A multi-lens wire drawing die aperture measurement system as claimed in any one of claims 1 to 5, wherein: the light source lens (1) and the imaging lens (2) are distributed in the same plane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311253399.XA CN117029704A (en) | 2023-09-27 | 2023-09-27 | Multi-lens wire drawing die aperture measurement system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311253399.XA CN117029704A (en) | 2023-09-27 | 2023-09-27 | Multi-lens wire drawing die aperture measurement system |
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| Publication Number | Publication Date |
|---|---|
| CN117029704A true CN117029704A (en) | 2023-11-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311253399.XA Pending CN117029704A (en) | 2023-09-27 | 2023-09-27 | Multi-lens wire drawing die aperture measurement system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118913143A (en) * | 2024-10-14 | 2024-11-08 | 成都曙创大能科技有限公司 | Method, system and electronic equipment for accurately measuring object size |
| CN119492344A (en) * | 2025-01-20 | 2025-02-21 | 成都曙创大能科技有限公司 | A wire drawing die concentricity measuring device and measuring method |
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| FR2261503A1 (en) * | 1974-02-19 | 1975-09-12 | Eastman Kodak Co | Determination of length and diameter of hole - involves generation of two electro-magnetic beams and use of focussing apparatus |
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| US20100284027A1 (en) * | 2007-12-10 | 2010-11-11 | David Scheiner | Optical system and method for measurement of one or more parameters of via-holes |
| US20210033489A1 (en) * | 2018-04-23 | 2021-02-04 | Carl Zeiss Vision International Gmbh | Method and device for measuring an optical lens for individual wearing situations by a user |
| CN113375575A (en) * | 2020-12-17 | 2021-09-10 | 成都曙创大能科技有限公司 | Wire diameter measuring device |
| CN217132983U (en) * | 2021-12-31 | 2022-08-05 | 帝尔激光科技(无锡)有限公司 | Laser micropore check out test set |
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2023
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|---|---|---|---|---|
| SE7313870L (en) * | 1973-10-12 | 1975-04-14 | Aga Ab | |
| FR2261503A1 (en) * | 1974-02-19 | 1975-09-12 | Eastman Kodak Co | Determination of length and diameter of hole - involves generation of two electro-magnetic beams and use of focussing apparatus |
| JPH06294619A (en) * | 1993-04-09 | 1994-10-21 | Mitsutoyo Corp | Microdiameter measuring equipment |
| WO2002014846A2 (en) * | 2000-08-10 | 2002-02-21 | Kla-Tencor Corporation | Multiple beam inspection apparatus and method |
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| US20210033489A1 (en) * | 2018-04-23 | 2021-02-04 | Carl Zeiss Vision International Gmbh | Method and device for measuring an optical lens for individual wearing situations by a user |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN118913143A (en) * | 2024-10-14 | 2024-11-08 | 成都曙创大能科技有限公司 | Method, system and electronic equipment for accurately measuring object size |
| CN119492344A (en) * | 2025-01-20 | 2025-02-21 | 成都曙创大能科技有限公司 | A wire drawing die concentricity measuring device and measuring method |
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Application publication date: 20231110 |