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Hier finden Sie wissenschaftliche Publikationen aus den FraunhoferInstituten. Monte Carlo simulation of threedimensional measurements of translucent objects
 Optical engineering 54 (2015), No.8, Art. 084111 ISSN: 00913286 ISSN: 00361860 ISSN: 15602303 

 English 
 Journal Article 
 Fraunhofer IOF () 
Abstract
In a previous article, we described the deviation between the real and the measured object surface that occurs when a translucent object is scanned by an active triangulation system. This error depends on the angle between the measurement direction and the object's surface normal, the surface reflection behavior, which can be described by a bidirectional reflectance distribution function, and the light penetration behavior. In general, the error is small if the surface is perpendicular to the measurement direction; it increases if the surface is tilted and decreases again for flat angles. This error curve is additionally affected by the surface roughness. The angle dependence is more distinct for smooth surfaces. In order to predict and compensate for the error, it is necessary to understand the errorforming process. Therefore, Monte Carlo simulations of several measurements were performed. As the computational cost is very high for threedimensional simulations, most of the simulations were performed in twodimensional space. We present the results of these simulations and discuss how the measurement error depends on the surface roughness, the measurement direction, and the scattering behavior of the material.