ALGORITHMS FOR THE CALIBRATION OF LASER-PLANE SENSORS ON CMMS

This paper deals with a method for the calibration of optical sensors on CMMs that relies on the measurement of specific artefacts. The calibration process consists of establishing the global transfer function between the 2D data given in the 2D space of the sensor and the 3D coordinates of points in the CMM space. The identification of the transfer function parameters requires the measurement of geometrical artefacts. In the paper, we suggest a specific artefact, the facet sphere. Algorithms for parameter identification are thus developed, based on the extraction of interest points belonging to the artefact. An estimation of dispersions associated with the method highlights the effect of some configuration parameters of the measuring system such as the position in the 2D space.