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Proceedings Paper

Telecentric scanner for 3D profilometry of very large objects
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Paper 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.

Paper Details

Date Published: 25 September 1997
PDF: 9 pages
Proc. SPIE 3100, Sensors, Sensor Systems, and Sensor Data Processing, (25 September 1997);
Show Author Affiliations
Simon Thibault, National Optics Institute and Univ. Laval (Canada)
Ermanno F. Borra, Univ. Laval (Canada)
Stan Szapiel, COM DEV Ltd. (Canada)

Published in SPIE Proceedings Vol. 3100:
Sensors, Sensor Systems, and Sensor Data Processing
Otmar Loffeld, Editor(s)

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