Calibration tool and method

A calibration tool for calibrating a laser-triangulation measuring system,

• wherein the calibration tool comprises a tool body that is rotatable relative to the measuring system about a rotation axis perpendicular to a reference plane,
• wherein the tool body is provided with one or more calibration surfaces that define a pattern of calibration positions,
• wherein the pattern comprises at least three columns distributed in a circumferential direction about the rotation axis and each extending in a radial direction away from the rotation axis and at least three rows distributed in the radial direction and each extending in the circumferential direction about the rotation axis,
• wherein for each of the at least three columns the calibration positions within said respective column vary in height relative to the reference plane in a height direction perpendicular to said reference plane, and
• wherein for each of the at least three rows the calibration positions within the respective row vary in height in the height direction relative to the reference plane.