The main component of the 3D-laser digitising system used in the presented study is a laser sensor (Kre ´on KLS 50). The laser is attached to a coordinatemeasuring machine (CMM), which moves the scanner
along three orthogonal axes (Fig. 1). A computer program controls the equipment and processes the generated data to be used for further calculations. The laser sensor projects a light strip 25-mm wide onto the surface of the object; this defines a ‘‘laser plane’’. Two charge-coupled device (CCD) cameras capture the images of the object cut by the laser plane. For coordinate calculation, the technique of fine triangulation is used, and since the position of the cameras with respect to the laser source is known, it is possible to project the images back into the plane by mathematical transformation. The scanner picks 600 points along the laser strips, which are 50 Am apart from each other (Fig. 2). The scanner has an accuracy of F20 Am and a resolution