In this contribution, we present new 3D sensor technologies based on three different methods of near-infrared projection technologies in combination with a stereo vision setup of two cameras. We explain the optical principles of an NIR GOBO projector, an array projector and a modified multi-aperture projection method and compare their performance parameters to each other. Further, we show some experimental measurement results of applications where we realized fast, accurate, and irritation-free measurements of human faces.
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Anika Brahm, Roland Ramm, Stefan Heist, Christian Rulff, Peter Kühmstedt, Gunther Notni, "Fast 3D NIR systems for facial measurement and lip-reading," Proc. SPIE 10220, Dimensional Optical Metrology and Inspection for Practical Applications VI, 102200P (1 May 2017);