Centro de Desarrollo de Sensores, Instrumentación y Sistemas

Universitat Politècnica de Catalunya

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Actualidad

26/10/2015
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Robert L. Kersman Award of Excellence for the Best Paper

En la última edición de la Aluminum Anodizers Annual Conference & Exhibition, el artículo titulado "Using Optical areal measurement methods to assess the surface shape and texture on aluminium anodized surfaces", recibió el Robert L. Kersman Award of Excellence for the Best Paper. El artículo ha sido fruto del trabajo de un equipo mixto formado por Andrés Arasanz, Niels Schwarz, Aitor Matilla y Jordi Mariné de la empresa Sensofar-Tech, spin-off del CD6 y por Roger Artigas y Cristina Cadevall del CD6.


http://www.sensofar.com/news/aac-awards-best-paper-to-sensofar/


Abstract:
 
Any optical system used for the surface finish measurement of an anodized part needs to recover the signal from the air/ano layer, which is very weak in comparison to the signal on the ano/aluminum layer. Confocal based optical systems work very well for this purpose, but they have the drawback of having to use high numerical aperture objectives, only possible with high magnification, and thus the need to use stitching to recover millimeter scale. This makes the measurement a slow task and not suitable for production environments. On the other hand, Coherence Scanning Interferometry (CSI) based systems can evaluate larger areas while keeping good signal separation between both interfaces. Some optical measurement systems can combine both, Confocal and CSI, for the evaluation of surface texture in the aluminum and the oxide layer at the same time. This makes it possible to characterize defects in 3D prior to the anodization process as well as assessing the quality of the final product.
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