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Simultaneous high-speed measurement of 3D surface shape and temperature
Author(s): Martin Landmann; Stefan Heist; Patrick Dietrich; Peter Lutzke; Ingo Gebhart; Joachim Templin; Peter Kühmstedt; Gunther Notni
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Paper Abstract

Pattern projection-based three-dimensional (3D) measurement systems are widely used for contactless, nondestructive, and full-field optical 3D shape measurements. 3D reconstruction is performed between one camera and the projector or between two cameras by detection and triangulation of corresponding image points. In order to record fast processes, such as people in motion or even explosions and crashes, we have recently developed a 3D stereo sensor consisting of two high-speed cameras and a GOBO projection-based high-speed pattern projector. The system, which works in the visible wavelength range (VIS), enables us to successfully reconstruct 3D point clouds of athletes in action, crash tests, or airbag inflations. However, as such processes usually exhibit local temperature changes, simultaneously measuring the surface temperature would be of great benefit. Therefore, we have extended our existing high-speed 3D sensor by including an additional high-speed longwave infrared (LWIR) camera, which detects radiation in the spectral range between 7.5 and 12 μm. The setup allows us to map the recorded temperature data onto the reconstructed 3D points. We present the design of this novel 5D (three spatial coordinates, temperature, and time) sensor and the process of simultaneously calibrating the VIS cameras and the LWIR camera in a common coordinate system. Moreover, we show first promising measurements of an inflating airbag and a basketball player conducted at a frame rate of 1 kHz.

Paper Details

Date Published: 13 May 2019
PDF: 8 pages
Proc. SPIE 10991, Dimensional Optical Metrology and Inspection for Practical Applications VIII, 109910O (13 May 2019); doi: 10.1117/12.2518211
Show Author Affiliations
Martin Landmann, Friedrich-Schiller-Univ. Jena (Germany)
Fraunhofer-Institut für Angewandte Optik und Feinmechanik (Germany)
Stefan Heist, Friedrich-Schiller-Univ. Jena (Germany)
Fraunhofer-Institut für Angewandte Optik und Feinmechanik (Germany)
Patrick Dietrich, Friedrich-Schiller-Univ. Jena (Germany)
Fraunhofer-Institut für Angewandte Optik und Feinmechanik (Germany)
Peter Lutzke, Fraunhofer-Institut für Angewandte Optik und Feinmechanik (Germany)
Ingo Gebhart, Fraunhofer-Institut für Angewandte Optik und Feinmechanik (Germany)
Joachim Templin, FLIR Systems GmbH (Germany)
Peter Kühmstedt, Fraunhofer-Institut für Angewandte Optik und Feinmechanik (Germany)
Gunther Notni, Fraunhofer-Institut für Angewandte Optik und Feinmechanik (Germany)
Technische Univ. Ilmenau (Germany)


Published in SPIE Proceedings Vol. 10991:
Dimensional Optical Metrology and Inspection for Practical Applications VIII
Kevin G. Harding; Song Zhang, Editor(s)

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