Three-dimensional scanning of specular and diffuse metallic surfaces using an infrared technique

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Bajard, Alban and Aubreton, Olivier and Bokhabrine, Youssef and Verney, Benjamin and Eren, Gönen and Erçil, Aytül and Truchetet, Frederic (2012) Three-dimensional scanning of specular and diffuse metallic surfaces using an infrared technique. Optical Engineering, 51 (6). ISSN 0091-3286 (Print) 1560-2303 (Online)

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Abstract

For the past two decades, the need for three-dimensional (3-D) scanning of industrial objects has increased significantly and many experimental techniques and commercial solutions have been proposed. However, difficulties remain for the acquisition of optically non-cooperative surfaces, such as transparent or specular surfaces. To address highly reflective metallic surfaces, we propose the extension of a technique that was originally dedicated to glass objects. In contrast to conventional active triangulation techniques that measure the reflection of visible radiation, we measure the thermal emission of a surface, which is locally heated by a laser source. Considering the thermophysical properties of metals, we present a simulation model of heat exchanges that are induced by the process, helping to demonstrate its feasibility on specular metallic surfaces and predicting the settings of the system. With our experimental device, we have validated the theoretical modeling and computed some 3-D point clouds from specular surfaces of various geometries. Furthermore, a comparison of our results with those of a conventional system on specular and diffuse parts will highlight that the accuracy of the measurement no longer depends on the roughness of the surface.
Item Type: Article
Additional Information: Article Number: 063603
Uncontrolled Keywords: three-dimensional scanning; infrared; heat transfer; specular surfaces; roughness
Subjects: T Technology > T Technology (General)
Divisions: Faculty of Engineering and Natural Sciences > Academic programs > Electronics
Faculty of Engineering and Natural Sciences
Depositing User: Aytül Erçil
Date Deposited: 27 Oct 2012 23:24
Last Modified: 26 Apr 2022 08:59
URI: https://research.sabanciuniv.edu/id/eprint/19899

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