We produce optical tracings with structured light and optomechanical 3D acquisition systems with precision rates of about 0.05 mm. Thanks to the scanning procedure, it is possible to obtain a virtual model, starting from a physical sample, which consists of a cloud of remarkably accurate points that undergo special processing to be converted into tessellated models for triangles.
One of the most important uses of the 3D scanning system is the possibility to obtain a direct comparison between a physical object and the corresponding initial CAD model. This is particularly important for quality control requirements where it is essential to identify and quantify the differences between the theoretical 3D project and the objects which are the result of the manufacturing cycles that, by nature, generate errors.
To assess the geometrical feasibility of a 3D scan of a part without having to resort to dissecting the object or the use of moulds, it must be simultaneously visible from two points at 60 degrees between each other. An initial analysis can be conducted using a set square; if this will not enter the cavities or nooks of the object, this means that a standard scan will not guarantee a complete reconstruction. In such cases it will be necessary to dissect the object. If dissecting is not feasible, as it is obviously a destructive option, it is possible to take silicone casts of the hidden areas that will then be scanned separately and assembled with the object's file.