Telecentric scanner for 3D profilometry of very large objects

Simon Thibault; Ermanno F. Borra; Stan Szapiel

doi:10.1117/12.287747

25 September 1997 Telecentric scanner for 3D profilometry of very large objects

Simon Thibault, Ermanno F. Borra, Stan Szapiel

Proceedings Volume 3100, Sensors, Sensor Systems, and Sensor Data Processing; (1997) https://doi.org/10.1117/12.287747
Event: Lasers and Optics in Manufacturing III, 1997, Munich, Germany

Abstract

Triangulation systems that are based on an autosynchronized scanning principle to provide accurate and fast acquisition of 3D shapes are able to scan large fields. It is done generally by a coordinate measuring machine (CMM) carrying a small-volume 3D camera. However the acquisition speed is limited by the CMM movement and also by the image fusion time required to get the complete 3D shape. This paper describes some practical consideration for large volume 3D inspections with emphasis on telecentric scanning. We present the analytical and the optical design of a large telecentric scanner using a large reflective surface. Some results of the laboratory prototype will be presented. We also discuss applications and the viability of this new approach.

Citation Download Citation

Simon Thibault, Ermanno F. Borra, and Stan Szapiel "Telecentric scanner for 3D profilometry of very large objects", Proc. SPIE 3100, Sensors, Sensor Systems, and Sensor Data Processing, (25 September 1997); https://doi.org/10.1117/12.287747

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