OptiMe is a new family of optical measuring systems based on stereo vision and photogrammetry, comprising two high resolution digital cameras, an illuminator or structured light projector and a PC running proprietary software for data acquisition and processing.
Depending on the arrangement of the cameras and the lenses used, the field of measure can range from a few square centimetres up to square metres; it is also possible to extend the field of measure even more by patching together several overlapping scans, using markers or simply relying on the features of the object.
OptiMe can work in two different modes:
Active mode: structured patterns of light are projected onto the surface and read back by the cameras. In this way OptiMe can acquire dense clouds of millions points and obtain a 3D representation of the surface, even if the surface is smooth and lacks recognizable features. The clouds can be converted to meshes and exported in several formats, including STL and PLY. This is useful both for reverse engineering – obtaining a CAD representation from a physical model – and for quality control – eg checking that the shape of a car body meets its CAD model.
Passive mode: if what has to be measured is not the surface itself but edges (holes, slots, margins) on it, unstructured lighting is sufficient to make such features readable by the cameras
Thanks to modern metrologic software it's possible to compare nominal values of cad models with measured data. Can be also prepared any kind of report as well as measurments of geometrical elements.