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:
May. 26, 2009
Filed:
Apr. 24, 2007
Wolfgang Heine, Taufkirchen, DE;
Dieter Spriegel, München, DE;
Michael Stockmann, Bruckmühl, DE;
Martin Weber, Markt Schwaben, DE;
Wolfgang Heine, Taufkirchen, DE;
Dieter Spriegel, München, DE;
Michael Stockmann, Bruckmühl, DE;
Martin Weber, Markt Schwaben, DE;
Siemens Aktiengesellschaft, Munich, DE;
Abstract
In one aspect, an optical sensor is used to detect defects, which can appear on smooth surfaces, is provided. The sensor includes a telecentric laser scanner and a detection unit. The scanner includes a laser for the approximately perpendicular illumination of a smooth surface, a scanning mirror, and a telecentric optical system for guiding illumination and detection beams the detection unit includes an optical detector system, a central diaphragm, which is concentrically positioned in the vicinity of the optical detector system in the direction toward the telecentric laser scanner, a highly sensitive photomultiplier for detecting scattered light, which emanates from defects on smooth surfaces, and a slit diaphragm arranged upstream of the photomultiplier.