Comparison of optical and laser 3D scanners

Abstract

Various types of 3D scanners are used for digitalization of objects. These are mostly different types of optical or laser 3D scanners. The presented article deals with the comparison of the Steinbichler Comet L3D optical scanner and the Creaform HandyScan EXAscan laser scanner. For scanners comparison, a specimen was designed that satisfies scanning criteria for both 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 exported to STL files. The data was evaluated in VolumeGraphics VGStudio MAX 2.2. In the comparison selected dimensions, shape and orientational deviations were evaluated and the scanned image obtained was compared to the CAD model.