LASER SCANNING MEASUREMENT SYSTEMS AND METHODS FOR SURFACE SHAPE MEASUREMENT OF HIDDEN SURFACES

摘要

Laser scanning measurement systems and methods are disclosed that allow for surface shape measurements of otherwise hidden portions of an object's surface. The system includes a laser system that scans a laser beam over a scan path, a photodetector that detects light reflected from the object's surface, and a processor adapted to process detector signals from the photodetector to determine a two-dimensional (2D) surface shape representation and a three-dimensional (3D) surface shape profile representation. The system includes a mirror(s) configured to direct the scanned laser beam to one or more portions of the object surface that cannot be directly irradiated by the laser, and that allows the photodetector to detect light reflected from the one or more hidden portions via the mirror(s). The laser scanning measurement system is able to measure, in a single laser beam scan, some or all of the hidden portion(s) of an object rather having to rotate the object or having to use multiple scanned laser beams or multiple scanning systems.