A high resolution CCD video camera (6) is positioned and aligned with respect to an illuminated article (7) so that a straight edge of the article, or a straight line junction between a bright zone and a dark zone of its surface, crosses the field of view of the camera in a direction substantially parallel...http://www.google.fr/patents/US5033096?utm_source=gb-gplus-shareBrevet US5033096 - Non-contact determination of the position of a rectilinear feature of an article
Non-contact determination of the position of a rectilinear feature of an article
