Imagery and Techniques for 3d Non-Contact Metrology

Figure 1:FPGA board driving a triple profile sensing unit.

Figure 2:Optical set-up to test a partially coherent super-luminescent diode.

 Open air laser metrology systems, in particular for the measurement of thermo-mechanical deformation of structures, have an important role both in research and industrial fields. The aim of this project is to exploit the long-term know-how developed in the implementation of metrology and mechanisms for the alignment and monitoring of active optical systems in optical telescopes and transfer it to the industrial ambient. Different phases of the project are: the implementation of FPGA (field programmable gate arrays) driven sensing units based on non-conventional CMOS detectors like two-dimensional profile sensors and extremely fast imagers (see Fig. 1). the implementation of sensing units able to monitor structural deformations both rigid (by optical alignment and auto-collimation) and elastic making use of partially-coherent light (SLD emitting diodes) and structured light (see Fig. 2). the implementation of autonomous sensing and measuring units, communicating with a collecting station also in a wireless way, a crucial argument when large areas are involved (i.e. antennae arrays) The project was funded for the next year by INAF through the "Ufficio di Trasferimento Tecnologico".

People: F. Bortoletto, C. Bonoli, M. D'Alessandro, A. Frigo, E. Giro, D. Magrin, L. Traverso

Collaboration: C. Pernechele (INAF OA Cagliari)

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