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Proceedings Paper

Indication of deformations on the surface of toroidal objects by an optoelectronic method
Author(s): Hans Rottenkolber; Werner P. O. Jueptner
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Paper Abstract

Laser light was revolutionary to optical testing methods. An optical method, shearography in combination with phase-shifting, has prooved as suited, easy- to- handle method to indicate deformations. Cartesian coordinates are usually applied, which are only an approximation when testing sections of toroidal objects. Tires approximative have a toroidal shape. By using polar shearing method deformations of the complete circumference of toroidal objects can be analyzed. An example of a defect in a tire will be shown. A small deformation of the tire by lowering the inner pressure permits dropping the critical unwrapping procedure. The pure modulo-2pi-image is used. The image processing procedure is modified to receive an absolute threshold for defect indication.

Paper Details

Date Published: 7 March 2006
PDF: 8 pages
Proc. SPIE 4101, Laser Interferometry X: Techniques and Analysis, (7 March 2006); doi: 10.1117/12.498393
Show Author Affiliations
Hans Rottenkolber, International Consultant (Germany)
Werner P. O. Jueptner, Bremer Institut fuer angewandte Strahltechnik (Germany)

Published in SPIE Proceedings Vol. 4101:
Laser Interferometry X: Techniques and Analysis
Gordon M. Brown; Malgorzata Kujawinska; Werner P. O. Jueptner; Ryszard J. Pryputniewicz; Ryszard J. Pryputniewicz; Mitsuo Takeda, Editor(s)

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