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:
Jun. 03, 2003
Filed:
Dec. 12, 2001
Thomas F. Long, Corbett, OR (US);
LSI Logic Corporation, Milpitas, CA (US);
Abstract
A system for identifying a substrate based on indicia formed in a surface of the substrate. The method includes forming the indicia having edge features and substantially flat features. The indicia is illuminated with incident illumination from an illumination source while moving the illumination source relative to the substrate, thereby scanning the incident illumination over the indicia. Reflected illumination having a first intensity level is received from the edge features of the indicia, and reflected illumination having a second intensity level is received from the substantially flat features of the indicia. The reflected illumination is detected to produce at least one output signal having a first amplitude level corresponding to the first intensity level and a second amplitude level corresponding to the second intensity level. The output signal is processed based at least in part upon the first and second intensity levels to form at least one image portion of the indicia. The indicia is recognized based at least in part upon the at least one image portion. The substrate is then identified based on the indicia.