A Comparison of the Outputs of 3D Scanners

Various types of 3D scanners are used for digitalization of objects (products, space). These are mostly different types of optic or laser 3D scanners. The presented article deals with the comparison of the Steinbichler Comet L3D optical scanner and the Creaform EXAscan laser scanner. Determination of parameters of both scanners is necessary if we need measure on obtained data and not only use the scanned shape. To make this comparison, a specimen was designed that satisfies scanning criteria using the two types of the 3D scanners; i.e. it does not contain complicated shapes or parts that are not possible to scan using the chosen technologies (deep apertures with a small diameter, corners, etc.). The designed specimen was scanned 3 times using both types of 3D scanners. The obtained images were then cleaned (elimination of unwanted artifacts) and STL files were generated. The obtained scanned data were evaluated using VolumeGraphics VGStudio MAX 2.2 software with the necessary modules. In the comparison selected dimensions, shape and orientational deviations were evaluated and the scanned image obtained was compared to the CAD model.