Special Section on High-Speed 3-D Optical Metrology and Applications

High-speed three-dimensional measurements with a fringe projection-based optical sensor

[+] Author Affiliations
Christian Bräuer-Burchardt

Fraunhofer IOF Jena, Albert-Einstein-Straße 7, D-07745 Jena, Germany

Andreas Breitbarth

Fraunhofer IOF Jena, Albert-Einstein-Straße 7, D-07745 Jena, Germany

Peter Kühmstedt

Fraunhofer IOF Jena, Albert-Einstein-Straße 7, D-07745 Jena, Germany

Gunther Notni

Fraunhofer IOF Jena, Albert-Einstein-Straße 7, D-07745 Jena, Germany

Opt. Eng. 53(11), 112213 (Jun 06, 2014). doi:10.1117/1.OE.53.11.112213
History: Received February 3, 2014; Revised April 23, 2014; Accepted April 29, 2014
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Abstract.  An optical three-dimensional (3-D) sensor based on a fringe projection technique that realizes the acquisition of the surface geometry of small objects was developed for highly resolved and ultrafast measurements. It realizes a data acquisition rate up to 60 high-resolution 3-D datasets per second. The high measurement velocity was achieved by consequent fringe code reduction and parallel data processing. The reduction of the length of the fringe image sequence was obtained by omission of the Gray code sequence using the geometric restrictions of the measurement objects and the geometric constraints of the sensor arrangement. The sensor covers three different measurement fields between 20mm×20mm and 40mm×40mm with a spatial resolution between 10 and 20 μm, respectively. In order to obtain a robust and fast recalibration of the sensor after change of the measurement field, a calibration procedure based on single shot analysis of a special test object was applied which works with low effort and time. The sensor may be used, e.g., for quality inspection of conductor boards or plugs in real-time industrial applications.

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© 2014 Society of Photo-Optical Instrumentation Engineers

Citation

Christian Bräuer-Burchardt ; Andreas Breitbarth ; Peter Kühmstedt and Gunther Notni
"High-speed three-dimensional measurements with a fringe projection-based optical sensor", Opt. Eng. 53(11), 112213 (Jun 06, 2014). ; http://dx.doi.org/10.1117/1.OE.53.11.112213


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