Patent ID: 7046348

Claim:
A device for measuring color, luster and undulation on enamelled freeform surfaces at a definable setpoint distance and symmetrically to measurement point normals at a measurement point, comprising a measurement head which is movable in three dimensions by at least one motor, a measurement head axis, a video camera, an opto-transmitter with a light pattern which is sent along an emission axis, the video camera having an optical axis, the measurement head axis, the emission axis and the optical axis lying in one plane, and the measurement head axis forming a bisector of an angle which is formed by the emission axis and the optical axis, an evaluation means for the light pattern imaged in the video camera by the opto-transmitter, evaluation means providing a control signal which is dependent on distortion or migration of the light pattern that is caused as a result of an absence of a setpoint distance and/or symmetry to measurement point normals, a motor control for the measurement head including an input of the control signal which causes motion of the measurement head to reduce distortion or migration of the light pattern imaged in the video camera to under a desired amount, such that both the measurement head axis with the measurement point normals and a vertex of the angle formed by an emission axis of the opto-transmitter and the optical axis of the video camera coincides with the measurement point.