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:
Oct. 13, 2009
Filed:
Jul. 05, 2006
Arnold Allweier, Allensbach, DE;
Arnold Allweier, Allensbach, DE;
Chromasens GmbH, Constance, DE;
Abstract
The invention relates to a device for dark-field illumination for an optical testing device for scanning a plane surface of an object together with a method for optical scanning of a plane surface of an object in which the device according to the invention is used. The illumination device according to the invention has a reflector which has in cross-section the form of a segment of an ellipse, while the illumination device may be arranged with a first focal point of the ellipse on the surface of the object, and the light source located at a point which results from reflection of the second focal point of the ellipse on the surface of the object. By this means, dark-field illumination with a high level of illumination at the first focal point is obtained, even when the light source is located a good distance away from the object.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile