The GBC-INOA laser scanning prototype, is realized mounting a optical head on a motorised slide, in order to make it possible to scan objects like statues and architectural details.

The light source is a laser diode, projecting a line of light with aperture angle of 60°;
the detector is a high resolution CCD camera equipped with a objective and an interferential filter, allowing the system to work in any lighting conditions.

The optical head and motorised slide system has been calibrated using reference surfaces, and has been corrected for distortions introduced by the objective.

For a typical working distance of about 50 cm, the scanning area is about 30X30 cm2. The consequent depth resolution, limited by the speckles, is 50 µm, and the final data accuracy is less then 0.3 mm.

In order to scan fine details like those of the clothing, or to scan parts which are particularly difficult to reach, like the arm in the Minerva statue (see figure) the system has been mounted on a frame, which can be moved and tilted in any direction.