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Proceedings Paper

Non-Contact Surface Flaw Detection By Fiber Optic Reflection Sensors
Author(s): P Wagli; R Huber; E Morger
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Paper Abstract

Optical sensors can be used for the non-contact control of mechanical parameters (e.g. surface quality) in fully automated production and assembly systems. The applicability of such optical sensor systems to a particular production line mainly depends on the detection limits (i.e. which size of scratches can be detected on a particular surface). A simple dimensionless number, D, was found describing the detection limit (D>1). The important parameters within D are: the reflectivity of both, the unperturbed surface and the defect, the area of the surface flaw and the noise generated by the statistical surface structure. The detection limits for different common flaws on various characteristic surfaces often present in the metal processing industry will be discussed together with examples of fiber optic sensor designs.

Paper Details

Date Published: 23 October 1986
PDF: 8 pages
Proc. SPIE 0665, Optical Techniques for Industrial Inspection, (23 October 1986); doi: 10.1117/12.938774
Show Author Affiliations
P Wagli, VOLPI AG (Switzerland)
R Huber, VOLPI AG (Switzerland)
E Morger, VOLPI AG (Switzerland)

Published in SPIE Proceedings Vol. 0665:
Optical Techniques for Industrial Inspection
Paolo G. Cielo, Editor(s)

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