Patent ID: 6386042
Filing Date: 2002-05-14
Classification: G01H

Abstract:
A method for contact-free, measurement of one of a displacement, a vibration, and both a displacement and vibration of an object (3) by at least one scanning interferometer (1) having at least one laser and at least one control unit that guides a laser beam emitted from the laser to actual positions of a plurality of measurement points on the object (3), the measurement being displayed at high resolution on at least one output unit (5), the method comprising the steps of:selecting the actual positions of the plurality of measurement points, recording the actual positions of the plurality of measurement points, displaying in the output unit (5) display positions of the plurality of measurement points, based on one of a stored image of the object and a video image of the object, and correcting errors in congruency between the actual positions of the plurality of measurement points and the display positions of the plurality of measurement points.