WO2009153067A3 - Device for contactless distance measurement - Google Patents
Device for contactless distance measurement Download PDFInfo
- Publication number
- WO2009153067A3 WO2009153067A3 PCT/EP2009/004481 EP2009004481W WO2009153067A3 WO 2009153067 A3 WO2009153067 A3 WO 2009153067A3 EP 2009004481 W EP2009004481 W EP 2009004481W WO 2009153067 A3 WO2009153067 A3 WO 2009153067A3
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- light
- wavelength
- optical interface
- source
- spectral
- Prior art date
Links
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
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
- G01B11/06—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness for measuring thickness ; e.g. of sheet material
- G01B11/0608—Height gauges
-
- 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
- G01B11/026—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness by measuring distance between sensor and object
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B2210/00—Aspects not specifically covered by any group under G01B, e.g. of wheel alignment, caliper-like sensors
- G01B2210/50—Using chromatic effects to achieve wavelength-dependent depth resolution
Abstract
A device for the measurement of the distance to an optical interface comprises a first light source (18a) generating polychromatic light. A first spectral source function (SFa), which is associated with the first light source (18a) and describes the dependence of the intensity of the generated light on the wavelength, includes a wavelength interval in which it is non-constant. The device further comprises a second light source (18b) which also generates polychromatic light, but to which a second spectral source function (SFb) is associated differing from the first spectral source function. An optical fiber (20) receives at one end the light generated by the light source. Imaging optics (26, 28) produces an image of the other fiber end (24) on the optical interface (12). This image is chromatically blurred along the optical axis due to chromatic longitudinal aberration of the imaging optics. A sensor (32) measures the intensity of light reflected from the optical interface (12). An evaluation unit (34) calculates the wavelength of the reflected light from the intensity measured by the sensor using the first and the second spectral source functions (SFa, SFb), and from the wavelength the distance to the optical interface.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102008029459.4 | 2008-06-20 | ||
DE200810029459 DE102008029459B4 (en) | 2008-06-20 | 2008-06-20 | Method and device for non-contact distance measurement |
Publications (3)
Publication Number | Publication Date |
---|---|
WO2009153067A2 WO2009153067A2 (en) | 2009-12-23 |
WO2009153067A8 WO2009153067A8 (en) | 2010-03-04 |
WO2009153067A3 true WO2009153067A3 (en) | 2010-05-06 |
Family
ID=41264192
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2009/004481 WO2009153067A2 (en) | 2008-06-20 | 2009-06-22 | Device for contacltess distance measurement |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE102008029459B4 (en) |
WO (1) | WO2009153067A2 (en) |
Families Citing this family (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101957179B (en) * | 2010-08-27 | 2012-02-01 | 清华大学 | Optical fiber displacement measurement system and method |
JP2012154765A (en) * | 2011-01-26 | 2012-08-16 | Rexxam Co Ltd | Optical measurement device |
GB2497792A (en) * | 2011-12-21 | 2013-06-26 | Taylor Hobson Ltd | Metrological apparatus comprising a confocal sensor |
DE102012009836A1 (en) * | 2012-05-16 | 2013-11-21 | Carl Zeiss Microscopy Gmbh | Light microscope and method for image acquisition with a light microscope |
DE102013008582B4 (en) * | 2013-05-08 | 2015-04-30 | Technische Universität Ilmenau | Method and apparatus for chromatic-confocal multipoint measurement and their use |
DE102013008645B3 (en) | 2013-05-21 | 2014-08-21 | Alsitec S.A.R.L. | Machining head for laser processing apparatus used for processing workpiece, has light sensors to detect emerged measurement light that is partially incident on areas of optical surfaces of focusing lens and impinged on laser radiation |
DE202013004725U1 (en) | 2013-05-21 | 2013-06-04 | Alsitec Sarl | Processing head for a laser processing device |
DE102013113265B4 (en) * | 2013-11-29 | 2019-03-07 | Grintech Gmbh | Device for non-contact optical distance measurement |
US9706094B2 (en) | 2014-12-05 | 2017-07-11 | National Security Technologies, Llc | Hyperchromatic lens for recording time-resolved phenomena |
JP6202035B2 (en) * | 2015-04-07 | 2017-09-27 | コニカミノルタ株式会社 | Image inspection apparatus and image forming apparatus |
US10408676B2 (en) | 2015-10-01 | 2019-09-10 | Mission Support and Test Services, LLC | Long-pulse-width variable-wavelength chirped pulse generator and method |
WO2017059879A1 (en) * | 2015-10-08 | 2017-04-13 | Baden-Württemberg Stiftung Ggmbh | Method for an optical distance measurement, sensor assembly, and use thereof |
DE102016115827A1 (en) * | 2016-08-25 | 2018-03-01 | Nanofocus Ag | Method and device for optical surface measurement with the aid of a chromatic confocal sensor |
JP6819362B2 (en) * | 2017-03-02 | 2021-01-27 | オムロン株式会社 | Confocal measuring device |
DE102017208290A1 (en) | 2017-05-17 | 2018-11-22 | Schott Ag | Apparatus and method for processing a workpiece along a predetermined processing line |
US11892279B2 (en) | 2018-11-05 | 2024-02-06 | Trinamix Gmbh | Detector and method for determining a position of at least one object |
JP7031626B2 (en) | 2019-03-13 | 2022-03-08 | オムロン株式会社 | The sensor head |
EP3992562A1 (en) * | 2020-11-03 | 2022-05-04 | KIMA Process Control GmbH | Optical measuring device with trigonometric evaluation |
US20230369090A1 (en) * | 2022-05-10 | 2023-11-16 | Sandisk Technologies Llc | Optical measurement tool containing chromatic aberration enhancement component and optical alignment method using the same |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2077421A (en) * | 1980-05-31 | 1981-12-16 | Rolls Royce | Displacement sensing |
EP1117129A2 (en) * | 2000-01-12 | 2001-07-18 | Tokyo Seimitsu Co.,Ltd. | Semiconductor wafer inspection machine |
DE10325942A1 (en) * | 2003-06-07 | 2005-01-05 | Jurca Optoelektronik Gmbh & Co. Kg | Contactless method for measuring the thickness of a transparent body, e.g. a lens, using a spectrograph, whereby the evaluation unit also considers the dispersion characteristics of the material of the object being measured |
EP1647799A1 (en) * | 2004-10-12 | 2006-04-19 | Precitec Optronik GmbH | Calibration of a surface measurement system |
DE102006007170A1 (en) * | 2006-02-08 | 2007-08-16 | Sirona Dental Systems Gmbh | Method and arrangement for fast and robust chromatic confocal 3D metrology |
US20080030743A1 (en) * | 2004-05-06 | 2008-02-07 | Carl Mahr Holding Gmbh | Measuring Device Having An Optical Probe Tip |
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2008
- 2008-06-20 DE DE200810029459 patent/DE102008029459B4/en active Active
-
2009
- 2009-06-22 WO PCT/EP2009/004481 patent/WO2009153067A2/en active Application Filing
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2077421A (en) * | 1980-05-31 | 1981-12-16 | Rolls Royce | Displacement sensing |
EP1117129A2 (en) * | 2000-01-12 | 2001-07-18 | Tokyo Seimitsu Co.,Ltd. | Semiconductor wafer inspection machine |
DE10325942A1 (en) * | 2003-06-07 | 2005-01-05 | Jurca Optoelektronik Gmbh & Co. Kg | Contactless method for measuring the thickness of a transparent body, e.g. a lens, using a spectrograph, whereby the evaluation unit also considers the dispersion characteristics of the material of the object being measured |
US20080030743A1 (en) * | 2004-05-06 | 2008-02-07 | Carl Mahr Holding Gmbh | Measuring Device Having An Optical Probe Tip |
EP1647799A1 (en) * | 2004-10-12 | 2006-04-19 | Precitec Optronik GmbH | Calibration of a surface measurement system |
DE102006007170A1 (en) * | 2006-02-08 | 2007-08-16 | Sirona Dental Systems Gmbh | Method and arrangement for fast and robust chromatic confocal 3D metrology |
Also Published As
Publication number | Publication date |
---|---|
DE102008029459B4 (en) | 2011-07-14 |
WO2009153067A8 (en) | 2010-03-04 |
DE102008029459A1 (en) | 2010-02-04 |
WO2009153067A2 (en) | 2009-12-23 |
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