Modeling of imaging fiber bundles and adapted signal processing for fringe projection
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Steffen Matthias
Steffen Matthias is a research associate at the Institute of Measurement and Automatic Control at Leibniz Universität Hannover.
,
Markus Kästner
Markus Kästner is the head of the department for production metrology at the Institute of Measurement and Automatic Control at Leibniz Universität Hannover.
Eduard Reithmeier is the head of the Institute of Measurement and Automatic Control at Leibniz Universität Hannover.
Abstract
Fringe projection profilometry is an established technique for capturing three-dimensional (3-D)-geometry data with high-point densities in short time. By combining fringe projection with endoscopy techniques, it is possible to perform inline inspection of industrial manufacturing processes. A new fringe projection system is presented, which uses flexible image fiber bundles to achieve versatile positioning of a compact sensor head. When measuring specimens with highly varying reflectivity, such as technical surfaces on tool geometries, measurement errors increase especially due to the crosstalk between individual fibers in the bundle. A detailed analysis of the transmission properties of the utilized fiber bundles is presented. It is shown that aliasing is avoided due to the non-regular grid structure of a bundle. Different techniques are demonstrated to reduce the effect of crosstalk on the phase evaluation. Measurements of highly reflective technical surfaces with different geometrical properties are shown.
Funding source: Deutsche Forschungsgemeinschaft
Award Identifier / Grant number: SFB/TR 73
Funding statement: Funding: Deutsche Forschungsgemeinschaft, (Grant/Award Number: ‘SFB/TR 73’).
About the authors
Steffen Matthias is a research associate at the Institute of Measurement and Automatic Control at Leibniz Universität Hannover.
Markus Kästner is the head of the department for production metrology at the Institute of Measurement and Automatic Control at Leibniz Universität Hannover.
Eduard Reithmeier is the head of the Institute of Measurement and Automatic Control at Leibniz Universität Hannover.
Acknowledgment
The authors would like to thank the German Research Foundation (DFG) for funding the project B6 “Endoscopic geometry inspection” within the Collaborative Research Center (CRC)/TR 73. Thanks to Dominic Stangier from TU Dortmund for providing the coated specimens used for the measurements in this article.
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©2016 THOSS Media & De Gruyter
Articles in the same Issue
- Cover and Frontmatter
- Community
- Conference Notes
- Conference Calendar
- News from the European Optical Society EOS
- Topical Issue: Optical 3D Sensing
- Review Articles
- High-speed optical 3D sensing and its applications
- Infrared deflectometry for the inspection of diffusely specular surfaces
- Multi-scale referencing and coordinate unification of optical sensors in multi-axis machines
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- A new form measurement system based on subaperture stitching with a line-scanning interferometer
- Evaluation of pixel-wise geometric constraint-based phase-unwrapping method for low signal-to-noise-ratio (SNR) phase
- Single-shot phase-measuring deflectometry for cornea measurement
- Modeling of imaging fiber bundles and adapted signal processing for fringe projection
- Noncontact three-dimensional quantitative profiling of fast aspheric lenses by optical coherence tomography
- Tutorial
- Aspherics in spectacle lenses
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- Structural noise tolerance of photonic crystal optical properties
Articles in the same Issue
- Cover and Frontmatter
- Community
- Conference Notes
- Conference Calendar
- News from the European Optical Society EOS
- Topical Issue: Optical 3D Sensing
- Review Articles
- High-speed optical 3D sensing and its applications
- Infrared deflectometry for the inspection of diffusely specular surfaces
- Multi-scale referencing and coordinate unification of optical sensors in multi-axis machines
- Research Articles
- 3D shape measurement with thermal pattern projection
- A new form measurement system based on subaperture stitching with a line-scanning interferometer
- Evaluation of pixel-wise geometric constraint-based phase-unwrapping method for low signal-to-noise-ratio (SNR) phase
- Single-shot phase-measuring deflectometry for cornea measurement
- Modeling of imaging fiber bundles and adapted signal processing for fringe projection
- Noncontact three-dimensional quantitative profiling of fast aspheric lenses by optical coherence tomography
- Tutorial
- Aspherics in spectacle lenses
- Research Article
- Structural noise tolerance of photonic crystal optical properties
