Optical digitizing and strategies to combine different views of an optical sensor

Hans Peter Duwe

doi:10.1117/12.281302

25 September 1997 Optical digitizing and strategies to combine different views of an optical sensor

Hans Peter Duwe

Proceedings Volume 3102, Rapid Prototyping and Flexible Manufacturing; (1997) https://doi.org/10.1117/12.281302
Event: Lasers and Optics in Manufacturing III, 1997, Munich, Germany

Abstract

Non-contact digitization of objects and surfaces with optical sensors based on fringe or pattern projection in combination with a CCD-camera allows a representation of surfaces with pointclouds equals x, y, z data points. To digitize the total surface of an object, it is necessary to combine the different measurement data obtained by the optical sensor from different views. Depending on the size of the object and the required accuracy of the measured data, different sensor set-ups with handling system or a combination of linear and rotation axes are described. Furthermore, strategies to match the overlapping pointclouds of a digitized object are introduced. This is very important especially for the digitization of large objects like 1:1 car models, etc. With different sensor sizes, it is possible to digitize small objects like teeth, crowns, inlays, etc. with an overall accuracy of 20 micrometer as well as large objects like car models, with a total accuracy of 0.5 mm. The various applications in the field of optical digitization are described.

Citation Download Citation

Hans Peter Duwe "Optical digitizing and strategies to combine different views of an optical sensor", Proc. SPIE 3102, Rapid Prototyping and Flexible Manufacturing, (25 September 1997); https://doi.org/10.1117/12.281302

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