“Flying Triangulation“ – acquiring all-around 3D topography on the fly

31.10.2012, 14:20

Newsletter 5

The recently developed optical measurement principle “Flying Triangulation” fills an important gap in 3D metrology, enabling the acquisition of the topography of moving objects. Immunity against relative motion between object and sensor also allows easy acquisition of complex objects – just by free hand-guided motion of the sensor around the object. No external tracking is necessary. The basic principle is as follows: A series of 3D profiles is acquired with a light-sectioning sensor. These profiles are already aligned to each other during the sensor movement, and the result is visualized in real time. Thus the user can spot missing areas and revisit them during the acquisition process. After a few seconds, a dense 3D model of the entire surface of interest is obtained. The sensors work at the physical limits resulting in minimal measurement uncertainty with respect to the underlying measurement volume. The measurement principle is scalable, enabling precise measurements of a wide range of objects in fields such as medicine, art and reverse engineering. 

 

Contact: svenja.ettl(at)physik.uni-erlangen(dot)de
Group: Leuchs Division – Häusler Group
Reference: S. Ettl et al., Appl. Opt. 51, 281-289 (2012).