Laser scanners determine the geometry of objects and surfaces using distance measurements. State-of-the-art systems also record the intensity of the light scattered back when doing so. Evaluating the intensity of the light scattered back allows a photo-realistic image of the surrounding area to be generated. Parallel system approaches can be implemented in order to be independent of light source and geometry-measurement receiver electronics. Defined light wavelengths, an ideally shaped measurement beam and parallelized detectors are required for generating an ideal image of the measuring object. This achieves resolutions in the region of one millimeter even for mobile laser-scan systems and with high travel speed.
Systems for pavement profile measurement
In addition to the scan profile, the Pavement Profile Scanner PPS-Plus captures a high-resolution intensity image of the road surface on which even smaller defects, such as cracks, can be detected.