Patent ID: 7298468
Filing Date: 2007-11-20
Classification: G01B,G01M

Abstract:
1. A method for contactless measurement of angles or angle changes on objects comprising: generating a beam bundle; transilluminating a screen using the beam bundle, the screen acting simultaneously as an aperture screen and a field screen and having an adjustable or variable screen opening in order to allow adaptation of the size of the screen image on a detector corresponding to a predefined measurement distance; imaging the transilluminated screen through an optical system on the detector surface after reflection on a distal reflecting element which is subjected to the angle changes to be measured; detecting the image of the screen on the detector surface; ascertaining the position of the screen image in relation to a reference position of the original screen image or to a reference point on the detector surface; and determining the measured value of the angle change α on the basis of the position displacement to the reference position and to the reference point respectively.