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Proceedings Paper

Use of Fresnel diffraction for the measurement of rotational symmetrical workpieces
Author(s): Hans Kurt Toenshoff; Andreas Tuennermann; Joern Korthals
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Paper Abstract

The shadow projection method is used in industrial applications for quality control of turned workpieces. The workpiece is illuminated with collimated laser radiation, and the shadow of the workpiece is detected by a scan using CCD lines without lenses. The movement and rotation of the workpiece allow the control diameters and lengths at different positions, and the determination of eccentricity. Together with the measurement of surface roughness by analysis of the diffraction pattern, the complete monitoring of turned workpieces is possible, using only one scan. Results show how the extension of the shadow projection method for roughness measurement can be done.

Paper Details

Date Published: 25 October 1999
PDF: 10 pages
Proc. SPIE 3784, Rough Surface Scattering and Contamination, (25 October 1999); doi: 10.1117/12.366717
Show Author Affiliations
Hans Kurt Toenshoff, Laser Zentrum Hannover e.V. (Germany)
Andreas Tuennermann, Friedrich-Schiller-Univ. Jena (Germany)
Joern Korthals, Laser Zentrum Hannover e.V. (Germany)


Published in SPIE Proceedings Vol. 3784:
Rough Surface Scattering and Contamination
Zu-Han Gu; Philip T. C. Chen; Zu-Han Gu; Alexei A. Maradudin; Alexei A. Maradudin, Editor(s)

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