Metrology pp 1-22 | Cite as

High-Speed Measurement of Complex Shaped Parts by Laser Triangulation for In-line Inspection

  • Alexander Schöch
  • Enrico SavioEmail author
Living reference work entry
Part of the Precision Manufacturing book series (PRECISION)


Measurement of complex shaped parts is of interest in many applications. Complex functional freeform surfaces may have a great influence on the performances of a product. Geometrical deviations in manufacturing can cause waste of large quantities of energy. Testing of parts having freeform surfaces is a key activity during the development of products with better performances. Depending on the workpiece shape, its manufacturing process, and tolerance limits, it is required to measure freeforms densely, for sufficiently high probability to capture crucial regions. This often requires fast measurement processes to keep measurement time feasible low. Fast measurements can be obtained by increasing the speed of acquiring a single point and/or parallelizing this process by acquiring multiple points at the same time. A brief overview of methods with high measurement speed is given. The concept of optical triangulation is discussed in detail, and case study is presented to illustrate an implementation in industry of a dedicated measuring system for high-speed measurement of complex shapes.


Freeform Complex shape Optical measurement Optical triangulation Laser triangulation High-speed measurement Multi-sensor measurement In-line inspection Dense sampling Industrial application 



The authors acknowledge the financial support in the HOTGAUGE project (E!6692), funded in the framework of the Eurostars Programme, and the support and advice from colleagues at authors’ institutions, as well as industrial partners Zumbach Electronic AG (Switzerland) and Pietro Rosa TBM s.r.l. (Italy).


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Copyright information

© Springer Nature Singapore Pte Ltd. 2019

Authors and Affiliations

  1. 1.Institute for Production Metrology, Materials and OpticsNTB University for TechnologyBuchsSwitzerland
  2. 2.Department of Industrial EngineeringUniversity of PadovaPadovaItaly

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