METROLOGICAL CONCEPTS AND APPLICATIONS OF 3D OPTICAL SCANNING

• DOI: https://doi.org/10.22533/at.ed.3174102425033

• Palavras-chave: 3D scanning; 3D optical scanners; metrology.

• Keywords: 3D scanning; 3D optical scanners; metrology.

• Abstract:

  This text presents some of the state of the art and technical and metrological aspects of 3D optical scanners (also commonly called digitizers). Optical digitizers create point clouds from data on an object's surface, which are used to build digital three-dimensional models. It has become essential equipment for dimensional analysis, reverse engineering, free-form surface evaluation, quality control, prototyping, etc. Some physical principles of the types of optical scanners are presented, and important aspects in the calibration of a 3D optical scanning system. Comments on surface texture and color are provided, as well as the difficulties inherent in scanning reflective surfaces and translucent objects. At the end, examples of scans with metrological applications are presented.