4 June 2012 Three-dimensional scanning of specular and diffuse metallic surfaces using an infrared technique
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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.
© 2012 Society of Photo-Optical Instrumentation Engineers (SPIE)
Alban Bajard, Alban Bajard, Olivier Aubreton, Olivier Aubreton, Youssef Bokhabrine, Youssef Bokhabrine, Benjamin Verney, Benjamin Verney, Frédéric Truchetet, Frédéric Truchetet, Gönen Eren, Gönen Eren, Aytul Erçil, Aytul Erçil, } "Three-dimensional scanning of specular and diffuse metallic surfaces using an infrared technique," Optical Engineering 51(6), 063603 (4 June 2012). https://doi.org/10.1117/1.OE.51.6.063603 . Submission:


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