Small Object

Small objects scanners are used for scanning small elements. They are really accurate, rather than terrestrial systems, with an accuracy under millimeters. The object to scan must be within a small distance from the scanner. The operation is based on the illumination of the object with a laser sweep which is taken from a CCD calibrated camera. The distance between the camera that captures the laser and the object is known, and also the angle of incidence of the beam captured by the CCD camera is known, so it allows to calculate very accurated the points that form the whole body scanned. Equipped with an optical camera as part of its operation, and together with the short acting distance, they are able to capture the texture of any element with better resolution. Appart from it, the restricted acting distance (about 2 meters) represents a limitation of the visual field of scanning. Another specific casuistry are the difficulties faced when capturing bodies which texture is brilliant or too dark, because the camera does not capture correctly the laser light with which these types of bright or dark bodies are lighted.

For bigger dimensional objects, its application can be combined with other scanning systems (phase-shift and time-of-flight). In this eay, it is possible to ensure that the point clouds are unified and equally simplified, improving the overall geometric registration. From this combination, a differentation or balance between each part of the structure and detail and the precision required for each zone it is set.

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