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Proceedings Paper

Optical 3D sensing and CAD/CAM for medicine and art conservation
Author(s): Gerd Haeusler; M. Benz; Peter Ettl; Stefan Karbacher; X. Laboureux; R. Lampalzer; K. Veit; E. Nkenke
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Paper Abstract

The combination of optical 3D-sensing, CAD/CAM and reverse engineering offers new opportunities for medical diagnosis and therapy, as well as for art conservation. We report our activities on the fields of dental CAD/CAM, face surgery, restoration, and others. We will discuss essential problems and solutions, specifically addressing the physical and technological limits for these applications. One example is that speckle noise limits the dynamical range of optical sensors to about 5000: 1, but a good visualization needs a dynamical range of 100000: 1 . A technical (and commercial) limitation of rapid prototyping is the high cost that prevents mass production. As a consequence, for those "real" applications mentioned above, we do not need only optical 3D-sensors that work at the limits given by physics, we need as well perfect surface reconstruction techniques to automatically smooth the sensor data, without destruction of edges. We have to register many views, automatically, and to visualize the data. The processing chain is only complete with effective technology for rapid prototyping, such as fused deposition modeling or laser sintering.

Paper Details

Date Published: 29 July 2002
PDF: 8 pages
Proc. SPIE 4900, Seventh International Symposium on Laser Metrology Applied to Science, Industry, and Everyday Life, (29 July 2002); doi: 10.1117/12.484492
Show Author Affiliations
Gerd Haeusler, Friedrich-Alexander Univ. Erlangen-Nuernberg (Germany)
M. Benz, Friedrich-Alexander Univ. Erlangen-Nuernberg (Germany)
Peter Ettl, 3D-Shape GmbH (Germany)
Stefan Karbacher, 3D-Shape GmbH (Germany)
X. Laboureux, 3D-Shape GmbH (Germany)
R. Lampalzer, 3D-Shape GmbH (Germany)
K. Veit, Friedrich-Alexander Univ. Erlangen-Nuernberg and 3D-Shape GmbH (Germany)
E. Nkenke, Friedrich-Alexander Univ. Erlangen-Nuernberg (Germany)

Published in SPIE Proceedings Vol. 4900:
Seventh International Symposium on Laser Metrology Applied to Science, Industry, and Everyday Life
Yuri V. Chugui; Sergei N. Bagayev; Albert Weckenmann; P. Herbert Osanna, Editor(s)

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