APPARATUS AND METHOD FOR NON-CONTACT SENSING OF TRANSPARENT ARTICLES

摘要

A laser-based displacement detector 26 is used to detect cosmetic coatings 22 applied to one surface of the transparent article 20 and thereby determine which side is uppermost when loaded into the laser processing system. In particular, articles 20 that are transparent to visible light and are particularly difficult to orient properly in laser processing systems are oriented using a laser-based displacement detector 26 in conjunction with a partial coating 22 on the article 20.