WO2002057755A1 - Messeinrichtung - Google Patents
Messeinrichtung Download PDFInfo
- Publication number
- WO2002057755A1 WO2002057755A1 PCT/EP2002/000322 EP0200322W WO02057755A1 WO 2002057755 A1 WO2002057755 A1 WO 2002057755A1 EP 0200322 W EP0200322 W EP 0200322W WO 02057755 A1 WO02057755 A1 WO 02057755A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- measuring
- measuring device
- units
- light
- detector
- Prior art date
Links
- 230000003287 optical effect Effects 0.000 claims abstract description 16
- 238000005259 measurement Methods 0.000 claims description 28
- 238000005286 illumination Methods 0.000 claims description 17
- 230000008878 coupling Effects 0.000 claims description 8
- 238000010168 coupling process Methods 0.000 claims description 8
- 238000005859 coupling reaction Methods 0.000 claims description 8
- 239000013307 optical fiber Substances 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 3
- 239000000835 fiber Substances 0.000 description 10
- 230000005540 biological transmission Effects 0.000 description 7
- 238000005452 bending Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000003973 paint Substances 0.000 description 3
- 230000003595 spectral effect Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 229910052736 halogen Inorganic materials 0.000 description 2
- 150000002367 halogens Chemical class 0.000 description 2
- 239000004922 lacquer Substances 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052724 xenon Inorganic materials 0.000 description 1
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/47—Scattering, i.e. diffuse reflection
- G01N21/4738—Diffuse reflection, e.g. also for testing fluids, fibrous materials
- G01N21/474—Details of optical heads therefor, e.g. using optical fibres
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/46—Measurement of colour; Colour measuring devices, e.g. colorimeters
- G01J3/50—Measurement of colour; Colour measuring devices, e.g. colorimeters using electric radiation detectors
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/46—Measurement of colour; Colour measuring devices, e.g. colorimeters
- G01J3/50—Measurement of colour; Colour measuring devices, e.g. colorimeters using electric radiation detectors
- G01J3/504—Goniometric colour measurements, for example measurements of metallic or flake based paints
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/251—Colorimeters; Construction thereof
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/55—Specular reflectivity
- G01N21/57—Measuring gloss
Definitions
- the invention relates to a measuring device with at least one measuring unit having at least one optical transmitter and at least one optical receiver and at least one light source connected to the measuring unit via an optical fiber and a detector connected to the measuring unit via an optical fiber.
- Known color measurement systems have a single fixed transmission and reception arrangement. Usually only one light source and only one detector are used. The lighting is often done with halogen light sources or xenon light sources in pulse or continuous operation.
- the light source illuminates the test sample directly, but mostly it is coupled to a light guide.
- the light guide then illuminates the sample either directly by means of a round fiber bundle, a ring light arrangement of fibers or several fiber bundles which illuminate the measurement sample from different directions. It is also known to parallelize the light emerging from the light guide via an optical transmitter in order to achieve a defined direction of illumination. Often three photocells with corresponding optical filters according to the three-range method are used as detectors, or a three-element photocell with vapor-deposited optical filters is used.
- spectrophotometers with a rotating grating or to use diode line or CCD line spectrometers with a fixed grating.
- the detector is usually connected via an optical fiber.
- a parallelizing optical measuring head which is also referred to as a receiving measuring head, can be located between the measuring sample and the light guide. In the arrangements mentioned, only a fixed illumination or reception geometry is used for the color measurement on the sample.
- measuring devices for color measurement systems which measure characteristics, in particular the color of a measurement object, from several angles.
- measuring systems either measured with a fixed illumination angle and several fixed reception angles or with a fixed reception angle and several fixed illumination angles.
- measuring systems of this type are inadequate when used to measure the angle-dependent color characteristics of novel lacquers and paints.
- a single illumination angle nor a single reception angle can be predefined.
- detector units such as. B. spectrometer
- lighting units must be used, which leads to higher costs due to the increased component costs.
- all measurement geometries must be arranged over the sample at the same time, as a result of which the geometric possibilities for arranging the measurement heads are restricted and not all the desired illumination angles and reception angles can be measured.
- the illumination angle and the reception angle can be set manually or in a motorized manner.
- a goniometer offers the possibility of setting any illumination angle and reception angle by means of two movable measuring heads.
- goniometers are difficult to adjust and, due to their susceptibility to adjustment, they can only be used for laboratory applications, but not for routine production controls. Furthermore, the outlay in terms of apparatus for automated goniometers with motor control is high, which makes the devices expensive.
- the light source and detector are generally coupled to the measuring heads via light guides, so that movement of the measuring heads leads to a change in the bending curves of the light guides and changes in the spectral transmission of the optical fibers. Therefore, inaccuracies in goniometers result from a movement of the measuring heads relative to the light source and the detector, which has a disadvantageous effect on the accuracy of the color value determination. Due to the increasing use of coatings and paints with waving ⁇ lcomber color characteristic, ie, a color characteristic that depends on the angle of illumination as well as on the viewing or reception angle, the demand for precise Mehrwinkelfarbmeßtechnikn.
- the invention is therefore based on the object of providing a measuring device with which the above-mentioned disadvantages of conventional measuring systems are avoided and in particular to determine the most accurate possible color characteristics as a function of the angle, and this with different illumination and reception geometries.
- the measuring device in that at least two measuring units are combined to form a measuring arrangement, the measuring units each have light guide connections and these connections with a light source which can be connected together for at least two measuring units or a detector which can be connected together for at least two measuring units are optionally connectable.
- the illumination and reception angle of the transmitter and receiver of a measurement unit with respect to a measurement object is different for each measurement unit in order to implement different illumination and reception angles for the color measurement in one and the same measurement device.
- each transmitter and receiver of a measuring unit is connected to the respective connection of the measuring unit via a transmitter or receiving light guide, and these are advantageously rigidly laid in the measuring unit.
- a further very advantageous embodiment of the invention who is a contact-free coupled ⁇ which the light source and detector light guides to the respective terminal of a measuring unit.
- an optical coupling device is provided between the light source and detector light guide on the one hand and the connection of the measuring unit on the other hand. This enables a precise and reliable coupling between the light guides.
- measuring arrangement is arranged to be movable with respect to the measurement object. Any measuring unit can be moved to the sample by moving the measuring units combined in the measuring arrangement. This is known as measuring head multiplexing.
- the movement of the measuring arrangement is linear or alternatively a rotary movement.
- the light source and detector light guides are preferably coupled to respective connections of different measuring units when the measuring arrangement is moving, in order to ensure the aforementioned fiber multiplexing.
- the respective measuring unit is located at the same location with respect to the measurement object during the measurement process. This ensures that only specific illumination angles and reception angles of the measuring unit are the only variable measurement parameters.
- the measuring units of the measuring arrangement are arranged in a circle, which enables the measuring units to be moved by a rotary movement.
- the measuring units of the measuring arrangement are arranged linearly in order to displace the measuring units by means of a linear transverse movement.
- Another very advantageous embodiment of the invention is that a plurality of light sources can be coupled to the measuring units via respective light lines, as a result of which greater flexibility in construction is achieved.
- a plurality of detectors are advantageously coupled to the measuring units via respective light lines, in order to read different measuring parameters simultaneously from several measuring units and / or different measuring units.
- FIG. 1 is a schematic view of an embodiment of the measuring device according to the invention.
- Fig. 3 is a sketch of another embodiment of the measuring device.
- the measuring device 1 has several measuring units 2, which are combined in a measuring arrangement 3 (see FIGS. 2 and 3).
- the measuring device device 1 also has a light source 4 and a detector 5.
- the light source 4 is a halogen light source 4, which couples light into one end 15 of a light guide 6.
- the light guide 6 serves as an illumination fiber and can be coupled at its other end 7 to a light guide 8 of the measuring unit 2.
- the detector 5 is a diode line spectrometer.
- the spectrometer 5 is coupled to one end 9 of an optical fiber 10.
- the light guide 10 serves as a receiving fiber and its other end 11, similar to the light guide 6, is coupled to a light guide 12 of the measuring unit 2.
- the measuring unit 2 comprises two optical measuring heads, an illuminating measuring head or transmitter 13 and a receiving measuring head or receiver 14.
- the transmitter 13 is connected to a transmission light guide 8 at 19, the transmission light guide 8 connecting the transmitter to light guide connections 16, 17 of the measuring unit 2.
- the receiver 14 is connected to one end 18 of a receiver light guide 12, the receiver light guide 12 leading to a light guide connection 17 of the measuring unit.
- the ends 7, 11 of the light source and detector light guides 6, 10 lie in front of the corresponding ends 16, 17 of the transmitter and receiver light guides 8, 12. In this configuration, light from the light source light guide 6 into the transmitter light guide 8 and light coupled from the receiver light guide 12 into the detector light guide 10.
- the coupling could also be carried out via imaging optics.
- the light emerging from the transmitter light guide 8 is parallelized via an optical system 20 in the transmitter 13 and illuminates a measurement object 2 located in front of the measurement unit 2
- the color values can thus be determined as a function of the illumination angle ⁇ and the reception angle ⁇ .
- the number of measuring units 2 is in principle arbitrary.
- the measuring units 2 combined in the measuring arrangement 3 can, as shown in FIG. 2, form a stack.
- the measuring units 2 are arranged in a ring shape, as can be seen in FIG. 3, to the measuring arrangement 3.
- the individual measuring units 2 are in principle identical in construction, but differ in the illumination and reception angle of the transmitter 13 and receiver 14 with respect to the measuring object 21 for each measuring unit 2.
- the measuring arrangement 3 is arranged so as to be movable and can be transversely arranged as a whole rigid unit from a linear unit 23 in the z direction (see Fig. 1), d. H. be moved perpendicular to the plane of the drawing.
- any measuring unit 2 can be moved beneath the measuring object 22 (also called measuring head multiplex), with the free light guide ends 16, 17 of the transmitter and receiver light guides 8, 12 of the measuring unit 2 simultaneously leading to the light source and detector light guides 6, 10 due to this displacement be coupled (what is called fiber multiplexing).
- a rotary unit (not shown) which rotates a measuring arrangement 3, as shown in FIG. 3, can also be used for the combination of measuring head multiplexing and fiber multiplexing described above.
- the maximum number of measuring units 2 is limited by the total rotation angle of 360 ° available.
- the measuring device 1 described above thus offers the possibility of switching quickly and optionally also automatically between different measurement geometries.
- different measuring units 2 are coupled to the detector 5 and the light source 4 and used for the measurement.
- the components of each measuring unit 2 form a rigid unit.
- the transmission and receptions and seminars ⁇ are gerlichtleiter 8, 12 fixedly mounted within the measuring unit. 2
- the measuring device 1 according to the invention thus enables multi-angle color measurement by using the individually configured measuring units 2, without causing changes in the bending curves of the same by any changes in the position of the light guides. Changes in the spectral transmission of the light guides 6, 10, 8, 12, which have an adverse effect on the accuracy of the color value determination, are therefore excluded.
- a plurality of light sources 4 or detectors 5 can be coupled with respective light guides to the measuring units 2 and their respective connections 16, 17 in order to provide different types of light sources 4, different detectors 5 for measuring a large number of parameters, and / or to provide redundancy in a measurement.
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP02702267A EP1352229B1 (de) | 2001-01-19 | 2002-01-15 | Messeinrichtung |
DE50201098T DE50201098D1 (de) | 2001-01-19 | 2002-01-15 | Messeinrichtung |
US10/466,582 US7023555B2 (en) | 2001-01-19 | 2002-01-15 | Measuring apparatus |
AT02702267T ATE277345T1 (de) | 2001-01-19 | 2002-01-15 | Messeinrichtung |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10103163A DE10103163A1 (de) | 2001-01-19 | 2001-01-19 | Meßeinrichtung |
DE10103163.7 | 2001-01-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2002057755A1 true WO2002057755A1 (de) | 2002-07-25 |
Family
ID=7671615
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2002/000322 WO2002057755A1 (de) | 2001-01-19 | 2002-01-15 | Messeinrichtung |
Country Status (5)
Country | Link |
---|---|
US (1) | US7023555B2 (de) |
EP (1) | EP1352229B1 (de) |
AT (1) | ATE277345T1 (de) |
DE (2) | DE10103163A1 (de) |
WO (1) | WO2002057755A1 (de) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1890556A (zh) * | 2003-10-07 | 2007-01-03 | 纳幕尔杜邦公司 | 用于测定薄膜或者涂层中效应-粒子取向的方法和装置 |
DE10356729B4 (de) * | 2003-12-02 | 2011-08-11 | Deutsches Zentrum für Luft- und Raumfahrt e.V., 51147 | Farbsensor |
DE102004030546A1 (de) * | 2004-06-24 | 2006-01-19 | Mahlo Gmbh & Co. Kg | Farbmessvorrichtung und Farbmessverfahren |
US7944561B2 (en) * | 2005-04-25 | 2011-05-17 | X-Rite, Inc. | Measuring an appearance property of a surface using a bidirectional reflectance distribution function |
US8345252B2 (en) | 2005-04-25 | 2013-01-01 | X-Rite, Inc. | Method and system for enhanced formulation and visualization rendering |
CN101184986B (zh) * | 2005-04-25 | 2012-06-13 | 爱色丽公司 | 使用空间欠采样双向反射分布功能测量表面的外观属性 |
JP5399050B2 (ja) * | 2008-11-17 | 2014-01-29 | 株式会社フジクラ | 光ファイバ曲げ受光器 |
WO2013031917A1 (ja) * | 2011-08-30 | 2013-03-07 | 関西ペイント株式会社 | 顔料分散体の評価方法および評価装置 |
US9336465B2 (en) | 2013-03-15 | 2016-05-10 | Electronics For Imaging, Inc. | Method and apparatus for color print management |
US9232112B2 (en) | 2013-07-18 | 2016-01-05 | Electronics For Imaging, Inc. | Method and apparatus for effecting color separation, color variation, color characterization, and gamut mapping in color printing |
US10054549B2 (en) | 2014-01-09 | 2018-08-21 | Electronics For Imaging, Inc. | Method and apparatus for automatic measurement of various qualities of printed sheets |
US9885668B2 (en) * | 2014-08-29 | 2018-02-06 | Konica Minolta, Inc. | Surface inspection device, surface inspection method, and program |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH07218344A (ja) * | 1992-09-04 | 1995-08-18 | X Rite Inc | カラー特性測定装置 |
WO1996013709A1 (en) * | 1994-10-26 | 1996-05-09 | Byk-Gardner Usa | Portable color measuring device |
US6097025A (en) * | 1997-10-31 | 2000-08-01 | Ljl Biosystems, Inc. | Light detection device having an optical-path switching mechanism |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3145633A1 (de) * | 1981-11-17 | 1983-08-11 | Byk-Mallinckrodt Chemische Produkte Gmbh, 4230 Wesel | Vorrichtung zur farbmessung |
US5196906A (en) * | 1990-06-29 | 1993-03-23 | Tma Technologies, Inc. | Modular scatterometer with interchangeable scanning heads |
DE19950588B4 (de) * | 1999-10-20 | 2013-07-18 | Byk Gardner Gmbh | Vorrichtung und Verfahren zur Qualitätskontrolle von insbesondere lackierten Oberflächen |
-
2001
- 2001-01-19 DE DE10103163A patent/DE10103163A1/de not_active Withdrawn
-
2002
- 2002-01-15 US US10/466,582 patent/US7023555B2/en not_active Expired - Fee Related
- 2002-01-15 EP EP02702267A patent/EP1352229B1/de not_active Expired - Lifetime
- 2002-01-15 DE DE50201098T patent/DE50201098D1/de not_active Expired - Fee Related
- 2002-01-15 AT AT02702267T patent/ATE277345T1/de not_active IP Right Cessation
- 2002-01-15 WO PCT/EP2002/000322 patent/WO2002057755A1/de not_active Application Discontinuation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH07218344A (ja) * | 1992-09-04 | 1995-08-18 | X Rite Inc | カラー特性測定装置 |
WO1996013709A1 (en) * | 1994-10-26 | 1996-05-09 | Byk-Gardner Usa | Portable color measuring device |
US5754283A (en) * | 1994-10-26 | 1998-05-19 | Byk-Gardner Usa, Division Of Atlana | Color measuring device having interchangeable optical geometries |
US6097025A (en) * | 1997-10-31 | 2000-08-01 | Ljl Biosystems, Inc. | Light detection device having an optical-path switching mechanism |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 1998, no. 07 31 March 1998 (1998-03-31) * |
Also Published As
Publication number | Publication date |
---|---|
EP1352229B1 (de) | 2004-09-22 |
EP1352229A1 (de) | 2003-10-15 |
US20040051874A1 (en) | 2004-03-18 |
DE10103163A1 (de) | 2002-08-01 |
DE50201098D1 (de) | 2004-10-28 |
ATE277345T1 (de) | 2004-10-15 |
US7023555B2 (en) | 2006-04-04 |
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