The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 02, 2004
Filed:
Mar. 15, 2002
Bradley L. Quist, Lakeville, MN (US);
PPT Vision, Inc., Eden Prairie, MN (US);
Abstract
A machine-vision system and method are described for simultaneously imaging different sides of an object. The system includes an imager and optics that images two or more views of the first side of the object and of the second side. The views of the first side and the views of the second side of the object are each from different angles. A divider background surface is placed near a major surface of the object to obtain separate images of features of the object on the first side of the object and on the second side. In one embodiment, the divider diffuses light to back light the features on the object on the first side and back light the features on the second side of the object. In some embodiments, the information obtained is used to fix manufacturing problems in a semiconductor fabrication plant.